Threads.cpp revision ba699cb0f7f95f665593541d2b37e12fb10b85f1
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 3268c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornint androidSetThreadSchedulingGroup(pid_t tid, int grp) 3278c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3288c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (grp > ANDROID_TGROUP_MAX || grp < 0) { 3298c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return BAD_VALUE; 3308c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3318c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 332d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#if defined(HAVE_PTHREADS) 3337b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 3347b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (gDoSchedulingGroup) { 335ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten // set_sched_policy does not support tid == 0 336ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten if (tid == 0) { 337ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten tid = androidGetTid(); 338ce63396effb32212501658c25f2ec6d1bd8b0307Glenn Kasten } 3397b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (set_sched_policy(tid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ? 3407b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn SP_BACKGROUND : SP_FOREGROUND)) { 3417b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn return PERMISSION_DENIED; 3427b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } 3438c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 344d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#endif 3458c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3468c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return NO_ERROR; 3478c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3488c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3498c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornint androidSetThreadPriority(pid_t tid, int pri) 3508c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3518c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn int rc = 0; 352d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn 353d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#if defined(HAVE_PTHREADS) 3548c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn int lasterr = 0; 3558c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3567b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 3577b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (gDoSchedulingGroup) { 358f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten // set_sched_policy does not support tid == 0 359f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten int policy_tid; 360f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten if (tid == 0) { 361f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten policy_tid = androidGetTid(); 362f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten } else { 363f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten policy_tid = tid; 364f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten } 3657b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (pri >= ANDROID_PRIORITY_BACKGROUND) { 366f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten rc = set_sched_policy(policy_tid, SP_BACKGROUND); 3677b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) { 368f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten rc = set_sched_policy(policy_tid, SP_FOREGROUND); 3697b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } 3708c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3718c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3728c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (rc) { 3738c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn lasterr = errno; 3748c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3758c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3768c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (setpriority(PRIO_PROCESS, tid, pri) < 0) { 3778c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn rc = INVALID_OPERATION; 3788c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } else { 3798c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn errno = lasterr; 3808c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 381c5b138995e68910cfa95f88f12a1c69a102aa997Dianne Hackborn#endif 3828c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3838c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return rc; 3848c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3858c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3861d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huberint androidGetThreadPriority(pid_t tid) { 3879dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#if defined(HAVE_PTHREADS) 3881d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber return getpriority(PRIO_PROCESS, tid); 3899dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#else 3909dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber return ANDROID_PRIORITY_NORMAL; 3919dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#endif 3921d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber} 3931d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber 3944fb24275919aab88d0ce346f530c9911d6c08422Glenn Kastenint androidGetThreadSchedulingGroup(pid_t tid) 3954fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten{ 3964fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten int ret = ANDROID_TGROUP_DEFAULT; 3974fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 3984fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten#if defined(HAVE_PTHREADS) 3994fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten // convention is to not call get/set_sched_policy methods if disabled by property 4004fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 4014fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten if (gDoSchedulingGroup) { 4024fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten SchedPolicy policy; 4034fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten // get_sched_policy does not support tid == 0 4044fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten if (tid == 0) { 4054fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten tid = androidGetTid(); 4064fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4074fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten if (get_sched_policy(tid, &policy) < 0) { 4084fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = INVALID_OPERATION; 4094fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } else { 4104fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten switch (policy) { 4114fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten case SP_BACKGROUND: 4124fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = ANDROID_TGROUP_BG_NONINTERACT; 4134fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten break; 4144fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten case SP_FOREGROUND: 4154fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = ANDROID_TGROUP_FG_BOOST; 4164fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten break; 4174fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten default: 4184fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten // should not happen, as enum SchedPolicy does not have any other values 4194fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten ret = INVALID_OPERATION; 4204fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten break; 4214fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4224fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4234fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten } 4244fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten#endif 4254fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 4264fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten return ret; 4274fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten} 4284fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 429edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 430edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 431edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 432edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 433edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Mutex class 434edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 435edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 436edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 437ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 438ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 439edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 440edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 441edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex() 442edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 443edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 444edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 445edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project assert(sizeof(hMutex) == sizeof(mState)); 446edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 447edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 448edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 449edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 450edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 451edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex(const char* name) 452edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 453edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX: name not used for now 454edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 455edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 456429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 457429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 458429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner hMutex = CreateMutex(NULL, FALSE, NULL); 459429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner mState = (void*) hMutex; 460429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner} 461429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 462429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' TurnerMutex::Mutex(int type, const char* name) 463429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner{ 464429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner // XXX: type and name not used for now 465429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex; 466429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 467429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 468429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 469edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 470edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 471edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 472edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 473edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::~Mutex() 474edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 475edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle((HANDLE) mState); 476edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 477edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 478edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::lock() 479edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 480edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 481edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, INFINITE); 482edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return dwWaitResult != WAIT_OBJECT_0 ? -1 : NO_ERROR; 483edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 484edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 485edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Mutex::unlock() 486edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 487edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!ReleaseMutex((HANDLE) mState)) 4889f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: bad result from unlocking mutex\n"); 489edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 490edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 491edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::tryLock() 492edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 493edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 494edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 495edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, 0); 496edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (dwWaitResult != WAIT_OBJECT_0 && dwWaitResult != WAIT_TIMEOUT) 4979f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: bad result from try-locking mutex\n"); 498edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (dwWaitResult == WAIT_OBJECT_0) ? 0 : -1; 499edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 500edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 501edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 502edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Somebody forgot to implement threads for this platform." 503edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 504edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 505edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 506edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 507edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 508edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Condition class 509edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 510edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 511edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 512ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 513ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 514edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 515edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 516edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 517edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Windows doesn't have a condition variable solution. It's possible 518edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to create one, but it's easy to get it wrong. For a discussion, and 519edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * the origin of this implementation, see: 520edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 521edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.cs.wustl.edu/~schmidt/win32-cv-1.html 522edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 523edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * The implementation shown on the page does NOT follow POSIX semantics. 524edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * As an optimization they require acquiring the external mutex before 525edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * calling signal() and broadcast(), whereas POSIX only requires grabbing 526edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * it before calling wait(). The implementation here has been un-optimized 527edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to have the correct behavior. 528edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 529edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projecttypedef struct WinCondition { 530edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Number of waiting threads. 531edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int waitersCount; 532edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 533edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Serialize access to waitersCount. 534edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CRITICAL_SECTION waitersCountLock; 535edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 536edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Semaphore used to queue up threads waiting for the condition to 537edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // become signaled. 538edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE sema; 539edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 540edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // An auto-reset event used by the broadcast/signal thread to wait 541edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // for all the waiting thread(s) to wake up and be released from 542edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // the semaphore. 543edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE waitersDone; 544edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 545edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This mutex wouldn't be necessary if we required that the caller 546edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lock the external mutex before calling signal() and broadcast(). 547edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // I'm trying to mimic pthread semantics though. 548edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE internalMutex; 549edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 550edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Keeps track of whether we were broadcasting or signaling. This 551edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // allows us to optimize the code if we're just signaling. 552edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool wasBroadcast; 553edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 554edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t wait(WinCondition* condState, HANDLE hMutex, nsecs_t* abstime) 555edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 556edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Increment the wait count, avoiding race conditions. 557edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 558edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount++; 559edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: incr waitersCount to %d (tid=%ld)\n", 560edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // condState->waitersCount, getThreadId()); 561edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 562edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 563edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD timeout = INFINITE; 564edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (abstime) { 565edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project nsecs_t reltime = *abstime - systemTime(); 566edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (reltime < 0) 567edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project reltime = 0; 568edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project timeout = reltime/1000000; 569edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 570edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 571edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically release the external mutex and wait on the semaphore. 572edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD res = 573edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(hMutex, condState->sema, timeout, FALSE); 574edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 575edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: awake (tid=%ld)\n", getThreadId()); 576edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 577edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reacquire lock to avoid race conditions. 578edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 579edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 580edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // No longer waiting. 581edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount--; 582edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 583edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Check to see if we're the last waiter after a broadcast. 584edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool lastWaiter = (condState->wasBroadcast && condState->waitersCount == 0); 585edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 586edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: lastWaiter=%d (wasBc=%d wc=%d)\n", 587edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lastWaiter, condState->wasBroadcast, condState->waitersCount); 588edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 589edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 590edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 591edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If we're the last waiter thread during this particular broadcast 592edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // then signal broadcast() that we're all awake. It'll drop the 593edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // internal mutex. 594edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (lastWaiter) { 595edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically signal the "waitersDone" event and wait until we 596edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // can acquire the internal mutex. We want to do this in one step 597edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // because it ensures that everybody is in the mutex FIFO before 598edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // any thread has a chance to run. Without it, another thread 599edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // could wake up, do work, and hop back in ahead of us. 600edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(condState->waitersDone, condState->internalMutex, 601edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project INFINITE, FALSE); 602edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 603edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Grab the internal mutex. 604edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 605edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 606edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 607edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release the internal and grab the external. 608edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 609edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(hMutex, INFINITE); 610edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 611edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return res == WAIT_OBJECT_0 ? NO_ERROR : -1; 612edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 613edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} WinCondition; 614edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 615edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 616edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Constructor. Set up the WinCondition stuff. 617edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 618edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::Condition() 619edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 620edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = new WinCondition; 621edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 622edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount = 0; 623edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = false; 624edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // semaphore: no security, initial value of 0 625edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->sema = CreateSemaphore(NULL, 0, 0x7fffffff, NULL); 626edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project InitializeCriticalSection(&condState->waitersCountLock); 627edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // auto-reset event, not signaled initially 628edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersDone = CreateEvent(NULL, FALSE, FALSE, NULL); 629edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // used so we don't have to lock external mutex on signal/broadcast 630edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->internalMutex = CreateMutex(NULL, FALSE, NULL); 631edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 632edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = condState; 633edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 634edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 635edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 636edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Destructor. Free Windows resources as well as our allocated storage. 637edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 638edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::~Condition() 639edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 640edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 641edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState != NULL) { 642edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->sema); 643edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->waitersDone); 644edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete condState; 645edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 646edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 647edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 648edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 649edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::wait(Mutex& mutex) 650edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 651edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 652edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex = (HANDLE) mutex.mState; 653edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 654edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return ((WinCondition*)mState)->wait(condState, hMutex, NULL); 655edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 656edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 657edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::waitRelative(Mutex& mutex, nsecs_t reltime) 658edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 659429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner WinCondition* condState = (WinCondition*) mState; 660429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex = (HANDLE) mutex.mState; 661429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner nsecs_t absTime = systemTime()+reltime; 662429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 663429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner return ((WinCondition*)mState)->wait(condState, hMutex, &absTime); 664edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 665edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 666edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 667edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing one thread to continue. 668edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 669edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::signal() 670edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 671edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 672edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 673edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This ensures that we don't clash with 674edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // broadcast(). 675edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 676edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 677edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 678edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = (condState->waitersCount > 0); 679edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 680edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 681edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If no waiters, then this is a no-op. Otherwise, knock the semaphore 682edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // down a notch. 683edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) 684edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, 1, 0); 685edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 686edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 687edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 688edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 689edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 690edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 691edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing all threads to continue. 692edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 693edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * First we have to wake up all threads waiting on the semaphore, then 694edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * we wait until all of the threads have actually been woken before 695edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * releasing the internal mutex. This ensures that all threads are woken. 696edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 697edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::broadcast() 698edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 699edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 700edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 701edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This keeps the guys we're waking up 702edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // from getting too far. 703edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 704edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 705edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 706edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = false; 707edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 708edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState->waitersCount > 0) { 709edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project haveWaiters = true; 710edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = true; 711edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 712edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 713edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) { 714edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wake up all the waiters. 715edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, condState->waitersCount, 0); 716edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 717edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 718edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 719edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wait for all awakened threads to acquire the counting semaphore. 720edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // The last guy who was waiting sets this. 721edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->waitersDone, INFINITE); 722edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 723edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reset wasBroadcast. (No crit section needed because nobody 724edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // else can wake up to poke at it.) 725edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = 0; 726edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 727edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // nothing to do 728edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 729edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 730edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 731edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 732edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 733edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 734edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 735edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 736edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "condition variables not supported on this platform" 737edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 738edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 739edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 740edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 741edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 742edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * This is our thread object! 743edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 744edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 745edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::Thread(bool canCallJava) 746edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mCanCallJava(canCallJava), 747edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread(thread_id_t(-1)), 748edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock("Thread::mLock"), 749edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus(NO_ERROR), 750edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending(false), mRunning(false) 7517e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten#ifdef HAVE_ANDROID_OS 7527e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten , mTid(-1) 7537e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten#endif 754edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 755edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 756edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 757edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::~Thread() 758edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 759edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 760edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 761edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::readyToRun() 762edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 763edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 764edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 765edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 766edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::run(const char* name, int32_t priority, size_t stack) 767edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 768edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(mLock); 769edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 770edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mRunning) { 771edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // thread already started 772edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return INVALID_OPERATION; 773edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 774edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 775edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reset status and exitPending to their default value, so we can 776edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // try again after an error happened (either below, or in readyToRun()) 777edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = NO_ERROR; 778edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = false; 779edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 780edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 781edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // hold a strong reference on ourself 782edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mHoldSelf = this; 783edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 7849adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mRunning = true; 7859adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 786edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool res; 787edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mCanCallJava) { 788edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = createThreadEtc(_threadLoop, 789edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 790edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 791edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = androidCreateRawThreadEtc(_threadLoop, 792edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 793edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 794edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 795edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (res == false) { 796edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = UNKNOWN_ERROR; // something happened! 797edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mRunning = false; 798edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 7999adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mHoldSelf.clear(); // "this" may have gone away after this. 8009adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8019adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return UNKNOWN_ERROR; 802edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 803edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 8049adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Do not refer to mStatus here: The thread is already running (may, in fact 8059adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // already have exited with a valid mStatus result). The NO_ERROR indication 8069adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // here merely indicates successfully starting the thread and does not 8079adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // imply successful termination/execution. 8089adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return NO_ERROR; 8097e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten 8107e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // Exiting scope of mLock is a memory barrier and allows new thread to run 811edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 812edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 813edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint Thread::_threadLoop(void* user) 814edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 815edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Thread* const self = static_cast<Thread*>(user); 8167e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten 817edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> strong(self->mHoldSelf); 818edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<Thread> weak(strong); 819edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mHoldSelf.clear(); 820edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 821af1cf07134dccc884c654da0e713c9213d7be3f4Kenny Root#ifdef HAVE_ANDROID_OS 8224de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // this is very useful for debugging with gdb 8234de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mTid = gettid(); 8244de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian#endif 8254de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian 8269adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool first = true; 827edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 828edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project do { 8299adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool result; 8309adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (first) { 8319adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project first = false; 8329adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project self->mStatus = self->readyToRun(); 8339adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = (self->mStatus == NO_ERROR); 8349adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8357e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten if (result && !self->exitPending()) { 8369adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Binder threads (and maybe others) rely on threadLoop 8379adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // running at least once after a successful ::readyToRun() 8389adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (unless, of course, the thread has already been asked to exit 8399adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // at that point). 8409adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // This is because threads are essentially used like this: 8419adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (new ThreadSubclass())->run(); 8429adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // The caller therefore does not retain a strong reference to 8439adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // the thread and the thread would simply disappear after the 8449adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // successful ::readyToRun() call instead of entering the 8459adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // threadLoop at least once. 8469adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 8479adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 8489adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } else { 8499adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 8509adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 8519adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8527e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // establish a scope for mLock 8537e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten { 8547e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(self->mLock); 855edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == false || self->mExitPending) { 856edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mExitPending = true; 857edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mRunning = false; 858a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent // clear thread ID so that requestExitAndWait() does not exit if 859a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent // called by a new thread using the same thread ID as this one. 860a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent self->mThread = thread_id_t(-1); 8617e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // note that interested observers blocked in requestExitAndWait are 8627e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // awoken by broadcast, but blocked on mLock until break exits scope 8634de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mThreadExitedCondition.broadcast(); 864edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project break; 865edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 8667e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten } 867edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 868edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release our strong reference, to let a chance to the thread 869edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to die a peaceful death. 870edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong.clear(); 8714de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // And immediately, re-acquire a strong reference for the next loop 872edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong = weak.promote(); 873edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } while(strong != 0); 874edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 875edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 876edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 877edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 878edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Thread::requestExit() 879edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 8807e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(mLock); 881edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = true; 882edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 883edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 884edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::requestExitAndWait() 885edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 886d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten Mutex::Autolock _l(mLock); 8879adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (mThread == getThreadId()) { 88832397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW( 8899adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread (this=%p): don't call waitForExit() from this " 8909adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread object's thread. It's a guaranteed deadlock!", 8919adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project this); 892edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 8939adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return WOULD_BLOCK; 894edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 8959adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 896d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten mExitPending = true; 8979adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8989adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project while (mRunning == true) { 8999adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mThreadExitedCondition.wait(mLock); 9009adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 9017e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // This next line is probably not needed any more, but is being left for 9027e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // historical reference. Note that each interested party will clear flag. 9039adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mExitPending = false; 9049adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 905edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mStatus; 906edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 907edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 90858e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kastenstatus_t Thread::join() 90958e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten{ 91058e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten Mutex::Autolock _l(mLock); 91158e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten if (mThread == getThreadId()) { 91232397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW( 91358e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten "Thread (this=%p): don't call join() from this " 91458e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten "Thread object's thread. It's a guaranteed deadlock!", 91558e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten this); 91658e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 91758e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten return WOULD_BLOCK; 91858e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten } 91958e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 92058e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten while (mRunning == true) { 92158e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten mThreadExitedCondition.wait(mLock); 92258e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten } 92358e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 92458e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten return mStatus; 92558e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten} 92658e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 927ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#ifdef HAVE_ANDROID_OS 928ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kastenpid_t Thread::getTid() const 929ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten{ 930ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // mTid is not defined until the child initializes it, and the caller may need it earlier 931ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten Mutex::Autolock _l(mLock); 932ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten pid_t tid; 933ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten if (mRunning) { 934ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten pthread_t pthread = android_thread_id_t_to_pthread(mThread); 935ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten tid = __pthread_gettid(pthread); 936ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten } else { 937ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten ALOGW("Thread (this=%p): getTid() is undefined before run()", this); 938ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten tid = -1; 939ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten } 940ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten return tid; 941ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten} 942ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#endif 943ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten 944edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool Thread::exitPending() const 945edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 9467e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(mLock); 947edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mExitPending; 948edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 949edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 950edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 951edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 952edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 953