Threads.cpp revision 0818b0921ef6cda07f41b56d2ef19b2849dfefd1
1edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 2edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 3edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 4edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * you may not use this file except in compliance with the License. 6edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * You may obtain a copy of the License at 7edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 8edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 10edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * See the License for the specific language governing permissions and 14edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * limitations under the License. 15edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 16edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 179adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project// #define LOG_NDEBUG 0 18edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define LOG_TAG "libutils.threads" 19edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 20edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/threads.h> 21edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/Log.h> 22edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 238c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#include <cutils/sched_policy.h> 247b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn#include <cutils/properties.h> 258c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 26edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdio.h> 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdlib.h> 28edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <memory.h> 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <errno.h> 30edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <assert.h> 31edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <unistd.h> 32edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 33edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PTHREADS) 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <pthread.h> 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <sched.h> 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <sys/resource.h> 37ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#ifdef HAVE_ANDROID_OS 38ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten# include <bionic_pthread.h> 39ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#endif 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <windows.h> 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <stdint.h> 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <process.h> 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# define HAVE_CREATETHREAD // Cygwin, vs. HAVE__BEGINTHREADEX for MinGW 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PRCTL) 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/prctl.h> 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Thread wrappers 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectusing namespace android; 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PTHREADS) 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 647b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn * Create and run a new thread. 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * We create it "detached", so it cleans up after itself. 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projecttypedef void* (*android_pthread_entry)(void*); 70edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 719c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackbornstatic pthread_once_t gDoSchedulingGroupOnce = PTHREAD_ONCE_INIT; 729c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackbornstatic bool gDoSchedulingGroup = true; 739c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn 749c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackbornstatic void checkDoSchedulingGroup(void) { 759c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn char buf[PROPERTY_VALUE_MAX]; 769c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn int len = property_get("debug.sys.noschedgroups", buf, ""); 779c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn if (len > 0) { 789c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn int temp; 799c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn if (sscanf(buf, "%d", &temp) == 1) { 809c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn gDoSchedulingGroup = temp == 0; 819c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } 829c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } 839c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn} 849c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn 85edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstruct thread_data_t { 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_func_t entryFunction; 87edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* userData; 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int priority; 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char * threadName; 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // we use this trampoline when we need to set the priority with 92ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // nice/setpriority, and name with prctl. 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project static int trampoline(const thread_data_t* t) { 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_func_t f = t->entryFunction; 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* u = t->userData; 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int prio = t->priority; 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char * name = t->threadName; 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete t; 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project setpriority(PRIO_PROCESS, 0, prio); 1009c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 1019c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn if (gDoSchedulingGroup) { 1029c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn if (prio >= ANDROID_PRIORITY_BACKGROUND) { 1039c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn set_sched_policy(androidGetTid(), SP_BACKGROUND); 1049c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } else { 1059c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn set_sched_policy(androidGetTid(), SP_FOREGROUND); 1069c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } 1079c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } 1089c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (name) { 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PRCTL) 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Mac OS doesn't have this, and we build libutil for the host too 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int hasAt = 0; 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int hasDot = 0; 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char *s = name; 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project while (*s) { 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (*s == '.') hasDot = 1; 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project else if (*s == '@') hasAt = 1; 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s++; 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int len = s - name; 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (len < 15 || hasAt || !hasDot) { 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s = name; 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s = name + len - 15; 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project prctl(PR_SET_NAME, (unsigned long) s, 0, 0, 0); 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project free(name); 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return f(u); 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateRawThreadEtc(android_thread_func_t entryFunction, 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_t attr; 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_init(&attr); 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#ifdef HAVE_ANDROID_OS /* valgrind is rejecting RT-priority create reqs */ 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadPriority != PRIORITY_DEFAULT || threadName != NULL) { 147ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // Now that the pthread_t has a method to find the associated 148ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // android_thread_id_t (pid) from pthread_t, it would be possible to avoid 149ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // this trampoline in some cases as the parent could set the properties 150ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // for the child. However, there would be a race condition because the 151ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // child becomes ready immediately, and it doesn't work for the name. 152ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // prctl(PR_SET_NAME) only works for self; prctl(PR_SET_THREAD_NAME) was 153ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // proposed but not yet accepted. 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_data_t* t = new thread_data_t; 155edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->priority = threadPriority; 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->threadName = threadName ? strdup(threadName) : NULL; 157edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->entryFunction = entryFunction; 158edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->userData = userData; 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project entryFunction = (android_thread_func_t)&thread_data_t::trampoline; 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project userData = t; 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadStackSize) { 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_setstacksize(&attr, threadStackSize); 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project errno = 0; 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_t thread; 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int result = pthread_create(&thread, &attr, 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (android_pthread_entry)entryFunction, userData); 1723919950de8b54d4781c09e711fd2afabab452e69Le-Chun Wu pthread_attr_destroy(&attr); 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0) { 174e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("androidCreateRawThreadEtc failed (entry=%p, res=%d, errno=%d)\n" 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project "(android threadPriority=%d)", 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project entryFunction, result, errno, threadPriority); 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 180d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten // Note that *threadID is directly available to the parent only, as it is 181d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten // assigned after the child starts. Use memory barrier / lock if the child 182d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten // or other threads also need access. 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadId != NULL) { 184edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project *threadId = (android_thread_id_t)thread; // XXX: this is not portable 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 1; 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 189ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#ifdef HAVE_ANDROID_OS 190ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kastenstatic pthread_t android_thread_id_t_to_pthread(android_thread_id_t thread) 191ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten{ 192ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten return (pthread_t) thread; 193ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten} 194ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#endif 195ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten 196edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectandroid_thread_id_t androidGetThreadId() 197edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 198edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (android_thread_id_t)pthread_self(); 199edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 200edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 201edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 202edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 203edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 204edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 205edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 206edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Trampoline to make us __stdcall-compliant. 207edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 208edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * We're expected to delete "vDetails" when we're done. 209edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 210edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstruct threadDetails { 211edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int (*func)(void*); 212edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* arg; 213edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 214edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic __stdcall unsigned int threadIntermediary(void* vDetails) 215edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 216edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct threadDetails* pDetails = (struct threadDetails*) vDetails; 217edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int result; 218edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 219edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = (*(pDetails->func))(pDetails->arg); 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete pDetails; 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 2239f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_VERBOSE, "thread", "thread exiting\n"); 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (unsigned int) result; 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Create and run a new thread. 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic bool doCreateThread(android_thread_func_t fn, void* arg, android_thread_id_t *id) 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hThread; 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct threadDetails* pDetails = new threadDetails; // must be on heap 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project unsigned int thrdaddr; 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pDetails->func = fn; 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pDetails->arg = arg; 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE__BEGINTHREADEX) 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hThread = (HANDLE) _beginthreadex(NULL, 0, threadIntermediary, pDetails, 0, 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project &thrdaddr); 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (hThread == 0) 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_CREATETHREAD) 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hThread = CreateThread(NULL, 0, 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (LPTHREAD_START_ROUTINE) threadIntermediary, 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (void*) pDetails, 0, (DWORD*) &thrdaddr); 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (hThread == NULL) 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 2509f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: thread create failed\n"); 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_CREATETHREAD) 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project /* close the management handle */ 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(hThread); 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (id != NULL) { 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project *id = (android_thread_id_t)thrdaddr; 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return true; 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateRawThreadEtc(android_thread_func_t fn, 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return doCreateThread( fn, userData, threadId); 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectandroid_thread_id_t androidGetThreadId() 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (android_thread_id_t)GetCurrentThreadId(); 279edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 280edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 281edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 282edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 283edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Threads not supported" 284edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThread(android_thread_func_t fn, void* arg) 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 290edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return createThreadEtc(fn, arg); 291edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThreadGetID(android_thread_func_t fn, void *arg, android_thread_id_t *id) 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return createThreadEtc(fn, arg, "android:unnamed_thread", 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project PRIORITY_DEFAULT, 0, id); 297edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 298edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 299edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic android_create_thread_fn gCreateThreadFn = androidCreateRawThreadEtc; 300edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 301edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThreadEtc(android_thread_func_t entryFunction, 302edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 303edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 304edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 305edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 306edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 307edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 308edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gCreateThreadFn(entryFunction, userData, threadName, 309edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project threadPriority, threadStackSize, threadId); 310edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 311edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid androidSetCreateThreadFunc(android_create_thread_fn func) 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 314edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project gCreateThreadFn = func; 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 316edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 3178c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornpid_t androidGetTid() 3188c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3198c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#ifdef HAVE_GETTID 3208c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return gettid(); 3218c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#else 3228c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return getpid(); 3238c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#endif 3248c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3258c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3260818b0921ef6cda07f41b56d2ef19b2849dfefd1Jeff Brown#ifdef HAVE_ANDROID_OS 3278c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornint androidSetThreadSchedulingGroup(pid_t tid, int grp) 3288c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3298c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (grp > ANDROID_TGROUP_MAX || grp < 0) { 3308c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return BAD_VALUE; 3318c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3328c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 333d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#if defined(HAVE_PTHREADS) 3347b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 3357b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (gDoSchedulingGroup) { 336ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten // set_sched_policy does not support tid == 0 337ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten if (tid == 0) { 338ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten tid = androidGetTid(); 339ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten } 3407b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (set_sched_policy(tid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ? 3417b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn SP_BACKGROUND : SP_FOREGROUND)) { 3427b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn return PERMISSION_DENIED; 3437b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } 3448c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 345d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#endif 3468c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3478c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return NO_ERROR; 3488c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3498c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3508c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornint androidSetThreadPriority(pid_t tid, int pri) 3518c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3528c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn int rc = 0; 353d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn 354d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#if defined(HAVE_PTHREADS) 3558c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn int lasterr = 0; 3568c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3577b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 3587b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (gDoSchedulingGroup) { 359f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten // set_sched_policy does not support tid == 0 360f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten int policy_tid; 361f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten if (tid == 0) { 362f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten policy_tid = androidGetTid(); 363f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten } else { 364f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten policy_tid = tid; 365f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten } 3667b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (pri >= ANDROID_PRIORITY_BACKGROUND) { 367f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten rc = set_sched_policy(policy_tid, SP_BACKGROUND); 3687b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) { 369f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten rc = set_sched_policy(policy_tid, SP_FOREGROUND); 3707b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } 3718c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3728c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3738c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (rc) { 3748c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn lasterr = errno; 3758c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3768c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3778c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (setpriority(PRIO_PROCESS, tid, pri) < 0) { 3788c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn rc = INVALID_OPERATION; 3798c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } else { 3808c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn errno = lasterr; 3818c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 382c5b138995e68910cfa95f88f12a1c69a102aa997Dianne Hackborn#endif 3838c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3848c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return rc; 3858c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3868c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3871d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huberint androidGetThreadPriority(pid_t tid) { 3889dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#if defined(HAVE_PTHREADS) 3891d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber return getpriority(PRIO_PROCESS, tid); 3909dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#else 3919dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber return ANDROID_PRIORITY_NORMAL; 3929dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#endif 3931d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber} 3941d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber 3954fb24275919aab88d0ce346f530c9911d6c08422Glenn Kastenint androidGetThreadSchedulingGroup(pid_t tid) 3964fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten{ 3974fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten int ret = ANDROID_TGROUP_DEFAULT; 3984fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 3994fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten#if defined(HAVE_PTHREADS) 4004fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten // convention is to not call get/set_sched_policy methods if disabled by property 4014fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 4024fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten if (gDoSchedulingGroup) { 4034fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten SchedPolicy policy; 4044fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten // get_sched_policy does not support tid == 0 4054fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten if (tid == 0) { 4064fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten tid = androidGetTid(); 4074fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4084fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten if (get_sched_policy(tid, &policy) < 0) { 4094fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = INVALID_OPERATION; 4104fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } else { 4114fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten switch (policy) { 4124fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten case SP_BACKGROUND: 4134fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = ANDROID_TGROUP_BG_NONINTERACT; 4144fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten break; 4154fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten case SP_FOREGROUND: 4164fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = ANDROID_TGROUP_FG_BOOST; 4174fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten break; 4184fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten default: 4194fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten // should not happen, as enum SchedPolicy does not have any other values 4204fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = INVALID_OPERATION; 4214fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten break; 4224fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4234fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4244fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4254fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten#endif 4264fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 4274fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten return ret; 4284fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten} 4290818b0921ef6cda07f41b56d2ef19b2849dfefd1Jeff Brown#endif 4304fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 431edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 432edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 433edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 434edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 435edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Mutex class 436edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 437edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 438edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 439ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 440ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 441edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 442edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 443edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex() 444edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 445edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 446edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 447edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project assert(sizeof(hMutex) == sizeof(mState)); 448edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 449edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 450edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 451edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 452edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 453edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex(const char* name) 454edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 455edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX: name not used for now 456edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 457edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 458429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 459429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 460429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner hMutex = CreateMutex(NULL, FALSE, NULL); 461429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner mState = (void*) hMutex; 462429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner} 463429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 464429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' TurnerMutex::Mutex(int type, const char* name) 465429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner{ 466429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner // XXX: type and name not used for now 467429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex; 468429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 469429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 470429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 471edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 472edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 473edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 474edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 475edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::~Mutex() 476edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 477edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle((HANDLE) mState); 478edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 479edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 480edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::lock() 481edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 482edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 483edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, INFINITE); 484edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return dwWaitResult != WAIT_OBJECT_0 ? -1 : NO_ERROR; 485edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 486edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 487edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Mutex::unlock() 488edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 489edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!ReleaseMutex((HANDLE) mState)) 4909f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: bad result from unlocking mutex\n"); 491edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 492edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 493edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::tryLock() 494edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 495edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 496edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 497edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, 0); 498edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (dwWaitResult != WAIT_OBJECT_0 && dwWaitResult != WAIT_TIMEOUT) 4999f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: bad result from try-locking mutex\n"); 500edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (dwWaitResult == WAIT_OBJECT_0) ? 0 : -1; 501edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 502edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 503edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 504edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Somebody forgot to implement threads for this platform." 505edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 506edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 507edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 508edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 509edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 510edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Condition class 511edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 512edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 513edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 514ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 515ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 516edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 517edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 518edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 519edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Windows doesn't have a condition variable solution. It's possible 520edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to create one, but it's easy to get it wrong. For a discussion, and 521edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * the origin of this implementation, see: 522edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 523edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.cs.wustl.edu/~schmidt/win32-cv-1.html 524edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 525edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * The implementation shown on the page does NOT follow POSIX semantics. 526edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * As an optimization they require acquiring the external mutex before 527edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * calling signal() and broadcast(), whereas POSIX only requires grabbing 528edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * it before calling wait(). The implementation here has been un-optimized 529edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to have the correct behavior. 530edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 531edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projecttypedef struct WinCondition { 532edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Number of waiting threads. 533edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int waitersCount; 534edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 535edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Serialize access to waitersCount. 536edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CRITICAL_SECTION waitersCountLock; 537edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 538edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Semaphore used to queue up threads waiting for the condition to 539edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // become signaled. 540edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE sema; 541edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 542edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // An auto-reset event used by the broadcast/signal thread to wait 543edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // for all the waiting thread(s) to wake up and be released from 544edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // the semaphore. 545edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE waitersDone; 546edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 547edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This mutex wouldn't be necessary if we required that the caller 548edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lock the external mutex before calling signal() and broadcast(). 549edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // I'm trying to mimic pthread semantics though. 550edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE internalMutex; 551edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 552edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Keeps track of whether we were broadcasting or signaling. This 553edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // allows us to optimize the code if we're just signaling. 554edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool wasBroadcast; 555edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 556edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t wait(WinCondition* condState, HANDLE hMutex, nsecs_t* abstime) 557edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 558edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Increment the wait count, avoiding race conditions. 559edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 560edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount++; 561edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: incr waitersCount to %d (tid=%ld)\n", 562edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // condState->waitersCount, getThreadId()); 563edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 564edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 565edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD timeout = INFINITE; 566edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (abstime) { 567edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project nsecs_t reltime = *abstime - systemTime(); 568edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (reltime < 0) 569edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project reltime = 0; 570edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project timeout = reltime/1000000; 571edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 572edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 573edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically release the external mutex and wait on the semaphore. 574edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD res = 575edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(hMutex, condState->sema, timeout, FALSE); 576edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 577edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: awake (tid=%ld)\n", getThreadId()); 578edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 579edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reacquire lock to avoid race conditions. 580edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 581edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 582edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // No longer waiting. 583edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount--; 584edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 585edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Check to see if we're the last waiter after a broadcast. 586edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool lastWaiter = (condState->wasBroadcast && condState->waitersCount == 0); 587edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 588edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: lastWaiter=%d (wasBc=%d wc=%d)\n", 589edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lastWaiter, condState->wasBroadcast, condState->waitersCount); 590edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 591edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 592edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 593edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If we're the last waiter thread during this particular broadcast 594edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // then signal broadcast() that we're all awake. It'll drop the 595edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // internal mutex. 596edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (lastWaiter) { 597edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically signal the "waitersDone" event and wait until we 598edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // can acquire the internal mutex. We want to do this in one step 599edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // because it ensures that everybody is in the mutex FIFO before 600edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // any thread has a chance to run. Without it, another thread 601edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // could wake up, do work, and hop back in ahead of us. 602edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(condState->waitersDone, condState->internalMutex, 603edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project INFINITE, FALSE); 604edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 605edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Grab the internal mutex. 606edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 607edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 608edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 609edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release the internal and grab the external. 610edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 611edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(hMutex, INFINITE); 612edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 613edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return res == WAIT_OBJECT_0 ? NO_ERROR : -1; 614edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 615edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} WinCondition; 616edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 617edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 618edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Constructor. Set up the WinCondition stuff. 619edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 620edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::Condition() 621edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 622edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = new WinCondition; 623edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 624edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount = 0; 625edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = false; 626edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // semaphore: no security, initial value of 0 627edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->sema = CreateSemaphore(NULL, 0, 0x7fffffff, NULL); 628edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project InitializeCriticalSection(&condState->waitersCountLock); 629edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // auto-reset event, not signaled initially 630edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersDone = CreateEvent(NULL, FALSE, FALSE, NULL); 631edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // used so we don't have to lock external mutex on signal/broadcast 632edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->internalMutex = CreateMutex(NULL, FALSE, NULL); 633edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 634edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = condState; 635edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 636edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 637edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 638edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Destructor. Free Windows resources as well as our allocated storage. 639edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 640edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::~Condition() 641edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 642edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 643edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState != NULL) { 644edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->sema); 645edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->waitersDone); 646edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete condState; 647edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 648edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 649edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 650edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 651edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::wait(Mutex& mutex) 652edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 653edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 654edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex = (HANDLE) mutex.mState; 655edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 656edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return ((WinCondition*)mState)->wait(condState, hMutex, NULL); 657edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 658edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 659edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::waitRelative(Mutex& mutex, nsecs_t reltime) 660edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 661429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner WinCondition* condState = (WinCondition*) mState; 662429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex = (HANDLE) mutex.mState; 663429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner nsecs_t absTime = systemTime()+reltime; 664429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 665429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner return ((WinCondition*)mState)->wait(condState, hMutex, &absTime); 666edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 667edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 668edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 669edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing one thread to continue. 670edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 671edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::signal() 672edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 673edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 674edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 675edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This ensures that we don't clash with 676edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // broadcast(). 677edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 678edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 679edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 680edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = (condState->waitersCount > 0); 681edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 682edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 683edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If no waiters, then this is a no-op. Otherwise, knock the semaphore 684edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // down a notch. 685edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) 686edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, 1, 0); 687edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 688edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 689edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 690edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 691edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 692edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 693edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing all threads to continue. 694edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 695edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * First we have to wake up all threads waiting on the semaphore, then 696edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * we wait until all of the threads have actually been woken before 697edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * releasing the internal mutex. This ensures that all threads are woken. 698edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 699edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::broadcast() 700edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 701edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 702edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 703edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This keeps the guys we're waking up 704edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // from getting too far. 705edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 706edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 707edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 708edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = false; 709edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 710edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState->waitersCount > 0) { 711edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project haveWaiters = true; 712edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = true; 713edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 714edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 715edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) { 716edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wake up all the waiters. 717edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, condState->waitersCount, 0); 718edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 719edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 720edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 721edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wait for all awakened threads to acquire the counting semaphore. 722edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // The last guy who was waiting sets this. 723edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->waitersDone, INFINITE); 724edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 725edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reset wasBroadcast. (No crit section needed because nobody 726edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // else can wake up to poke at it.) 727edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = 0; 728edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 729edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // nothing to do 730edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 731edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 732edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 733edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 734edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 735edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 736edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 737edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 738edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "condition variables not supported on this platform" 739edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 740edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 741edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 742edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 743edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 744edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * This is our thread object! 745edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 746edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 747edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::Thread(bool canCallJava) 748edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mCanCallJava(canCallJava), 749edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread(thread_id_t(-1)), 750edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock("Thread::mLock"), 751edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus(NO_ERROR), 752edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending(false), mRunning(false) 7537e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten#ifdef HAVE_ANDROID_OS 7547e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten , mTid(-1) 7557e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten#endif 756edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 757edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 758edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 759edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::~Thread() 760edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 761edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 762edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 763edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::readyToRun() 764edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 765edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 766edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 767edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 768edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::run(const char* name, int32_t priority, size_t stack) 769edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 770edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(mLock); 771edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 772edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mRunning) { 773edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // thread already started 774edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return INVALID_OPERATION; 775edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 776edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 777edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reset status and exitPending to their default value, so we can 778edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // try again after an error happened (either below, or in readyToRun()) 779edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = NO_ERROR; 780edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = false; 781edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 782edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 783edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // hold a strong reference on ourself 784edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mHoldSelf = this; 785edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 7869adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mRunning = true; 7879adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 788edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool res; 789edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mCanCallJava) { 790edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = createThreadEtc(_threadLoop, 791edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 792edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 793edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = androidCreateRawThreadEtc(_threadLoop, 794edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 795edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 796edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 797edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (res == false) { 798edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = UNKNOWN_ERROR; // something happened! 799edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mRunning = false; 800edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 8019adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mHoldSelf.clear(); // "this" may have gone away after this. 8029adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8039adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return UNKNOWN_ERROR; 804edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 805edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 8069adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Do not refer to mStatus here: The thread is already running (may, in fact 8079adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // already have exited with a valid mStatus result). The NO_ERROR indication 8089adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // here merely indicates successfully starting the thread and does not 8099adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // imply successful termination/execution. 8109adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return NO_ERROR; 8117e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten 8127e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // Exiting scope of mLock is a memory barrier and allows new thread to run 813edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 814edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 815edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint Thread::_threadLoop(void* user) 816edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 817edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Thread* const self = static_cast<Thread*>(user); 8187e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten 819edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> strong(self->mHoldSelf); 820edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<Thread> weak(strong); 821edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mHoldSelf.clear(); 822edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 823af1cf07134dccc884c654da0e713c9213d7be3f4Kenny Root#ifdef HAVE_ANDROID_OS 8244de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // this is very useful for debugging with gdb 8254de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mTid = gettid(); 8264de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian#endif 8274de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian 8289adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool first = true; 829edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 830edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project do { 8319adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool result; 8329adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (first) { 8339adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project first = false; 8349adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project self->mStatus = self->readyToRun(); 8359adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = (self->mStatus == NO_ERROR); 8369adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8377e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten if (result && !self->exitPending()) { 8389adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Binder threads (and maybe others) rely on threadLoop 8399adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // running at least once after a successful ::readyToRun() 8409adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (unless, of course, the thread has already been asked to exit 8419adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // at that point). 8429adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // This is because threads are essentially used like this: 8439adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (new ThreadSubclass())->run(); 8449adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // The caller therefore does not retain a strong reference to 8459adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // the thread and the thread would simply disappear after the 8469adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // successful ::readyToRun() call instead of entering the 8479adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // threadLoop at least once. 8489adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 8499adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 8509adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } else { 8519adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 8529adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 8539adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8547e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // establish a scope for mLock 8557e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten { 8567e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(self->mLock); 857edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == false || self->mExitPending) { 858edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mExitPending = true; 859edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mRunning = false; 860a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent // clear thread ID so that requestExitAndWait() does not exit if 861a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent // called by a new thread using the same thread ID as this one. 862a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent self->mThread = thread_id_t(-1); 8637e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // note that interested observers blocked in requestExitAndWait are 8647e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // awoken by broadcast, but blocked on mLock until break exits scope 8654de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mThreadExitedCondition.broadcast(); 866edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project break; 867edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 8687e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten } 869edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 870edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release our strong reference, to let a chance to the thread 871edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to die a peaceful death. 872edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong.clear(); 8734de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // And immediately, re-acquire a strong reference for the next loop 874edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong = weak.promote(); 875edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } while(strong != 0); 876edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 877edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 878edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 879edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 880edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Thread::requestExit() 881edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 8827e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(mLock); 883edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = true; 884edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 885edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 886edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::requestExitAndWait() 887edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 888d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten Mutex::Autolock _l(mLock); 8899adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (mThread == getThreadId()) { 89032397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW( 8919adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread (this=%p): don't call waitForExit() from this " 8929adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread object's thread. It's a guaranteed deadlock!", 8939adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project this); 894edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 8959adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return WOULD_BLOCK; 896edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 8979adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 898d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten mExitPending = true; 8999adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 9009adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project while (mRunning == true) { 9019adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mThreadExitedCondition.wait(mLock); 9029adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 9037e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // This next line is probably not needed any more, but is being left for 9047e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // historical reference. Note that each interested party will clear flag. 9059adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mExitPending = false; 9069adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 907edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mStatus; 908edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 909edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 91058e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kastenstatus_t Thread::join() 91158e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten{ 91258e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten Mutex::Autolock _l(mLock); 91358e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten if (mThread == getThreadId()) { 91432397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW( 91558e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten "Thread (this=%p): don't call join() from this " 91658e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten "Thread object's thread. It's a guaranteed deadlock!", 91758e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten this); 91858e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 91958e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten return WOULD_BLOCK; 92058e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten } 92158e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 92258e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten while (mRunning == true) { 92358e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten mThreadExitedCondition.wait(mLock); 92458e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten } 92558e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 92658e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten return mStatus; 92758e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten} 92858e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 929ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#ifdef HAVE_ANDROID_OS 930ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kastenpid_t Thread::getTid() const 931ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten{ 932ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // mTid is not defined until the child initializes it, and the caller may need it earlier 933ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten Mutex::Autolock _l(mLock); 934ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten pid_t tid; 935ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten if (mRunning) { 936ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten pthread_t pthread = android_thread_id_t_to_pthread(mThread); 937ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten tid = __pthread_gettid(pthread); 938ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten } else { 939ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten ALOGW("Thread (this=%p): getTid() is undefined before run()", this); 940ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten tid = -1; 941ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten } 942ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten return tid; 943ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten} 944ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#endif 945ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten 946edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool Thread::exitPending() const 947edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 9487e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(mLock); 949edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mExitPending; 950edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 951edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 952edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 953edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 954edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 955