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); 10410cbbd8f1f2899b9dace6436401582bfe36d1cc4Glenn Kasten } else if (prio > ANDROID_PRIORITY_AUDIO) { 1059c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn set_sched_policy(androidGetTid(), SP_FOREGROUND); 10610cbbd8f1f2899b9dace6436401582bfe36d1cc4Glenn Kasten } else { 10710cbbd8f1f2899b9dace6436401582bfe36d1cc4Glenn Kasten // defaults to that of parent, or as set by requestPriority() 1089c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } 1099c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn } 1109c82c48d52edb722cc3991ef3c0ad5f07aa12feaDianne Hackborn 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (name) { 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PRCTL) 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Mac OS doesn't have this, and we build libutil for the host too 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int hasAt = 0; 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int hasDot = 0; 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char *s = name; 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project while (*s) { 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (*s == '.') hasDot = 1; 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project else if (*s == '@') hasAt = 1; 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s++; 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int len = s - name; 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (len < 15 || hasAt || !hasDot) { 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s = name; 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s = name + len - 15; 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project prctl(PR_SET_NAME, (unsigned long) s, 0, 0, 0); 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project free(name); 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return f(u); 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateRawThreadEtc(android_thread_func_t entryFunction, 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_t attr; 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_init(&attr); 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#ifdef HAVE_ANDROID_OS /* valgrind is rejecting RT-priority create reqs */ 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadPriority != PRIORITY_DEFAULT || threadName != NULL) { 149ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // Now that the pthread_t has a method to find the associated 150ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // android_thread_id_t (pid) from pthread_t, it would be possible to avoid 151ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // this trampoline in some cases as the parent could set the properties 152ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // for the child. However, there would be a race condition because the 153ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // child becomes ready immediately, and it doesn't work for the name. 154ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // prctl(PR_SET_NAME) only works for self; prctl(PR_SET_THREAD_NAME) was 155ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // proposed but not yet accepted. 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_data_t* t = new thread_data_t; 157edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->priority = threadPriority; 158edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->threadName = threadName ? strdup(threadName) : NULL; 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->entryFunction = entryFunction; 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->userData = userData; 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project entryFunction = (android_thread_func_t)&thread_data_t::trampoline; 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project userData = t; 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadStackSize) { 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_setstacksize(&attr, threadStackSize); 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project errno = 0; 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_t thread; 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int result = pthread_create(&thread, &attr, 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (android_pthread_entry)entryFunction, userData); 1743919950de8b54d4781c09e711fd2afabab452e69Le-Chun Wu pthread_attr_destroy(&attr); 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0) { 176e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("androidCreateRawThreadEtc failed (entry=%p, res=%d, errno=%d)\n" 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project "(android threadPriority=%d)", 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project entryFunction, result, errno, threadPriority); 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 182d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten // Note that *threadID is directly available to the parent only, as it is 183d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten // assigned after the child starts. Use memory barrier / lock if the child 184d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten // or other threads also need access. 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadId != NULL) { 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project *threadId = (android_thread_id_t)thread; // XXX: this is not portable 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 1; 189edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 190edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 191ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#ifdef HAVE_ANDROID_OS 192ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kastenstatic pthread_t android_thread_id_t_to_pthread(android_thread_id_t thread) 193ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten{ 194ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten return (pthread_t) thread; 195ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten} 196ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#endif 197ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten 198edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectandroid_thread_id_t androidGetThreadId() 199edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 200edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (android_thread_id_t)pthread_self(); 201edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 202edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 203edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 204edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 205edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 206edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 207edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 208edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Trampoline to make us __stdcall-compliant. 209edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 210edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * We're expected to delete "vDetails" when we're done. 211edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 212edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstruct threadDetails { 213edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int (*func)(void*); 214edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* arg; 215edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 216edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic __stdcall unsigned int threadIntermediary(void* vDetails) 217edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 218edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct threadDetails* pDetails = (struct threadDetails*) vDetails; 219edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int result; 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = (*(pDetails->func))(pDetails->arg); 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 223edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete pDetails; 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 2259f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_VERBOSE, "thread", "thread exiting\n"); 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (unsigned int) result; 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Create and run a new thread. 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic bool doCreateThread(android_thread_func_t fn, void* arg, android_thread_id_t *id) 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hThread; 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct threadDetails* pDetails = new threadDetails; // must be on heap 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project unsigned int thrdaddr; 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pDetails->func = fn; 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pDetails->arg = arg; 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE__BEGINTHREADEX) 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hThread = (HANDLE) _beginthreadex(NULL, 0, threadIntermediary, pDetails, 0, 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project &thrdaddr); 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (hThread == 0) 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_CREATETHREAD) 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hThread = CreateThread(NULL, 0, 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (LPTHREAD_START_ROUTINE) threadIntermediary, 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (void*) pDetails, 0, (DWORD*) &thrdaddr); 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (hThread == NULL) 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 2529f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: thread create failed\n"); 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_CREATETHREAD) 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project /* close the management handle */ 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(hThread); 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (id != NULL) { 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project *id = (android_thread_id_t)thrdaddr; 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return true; 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateRawThreadEtc(android_thread_func_t fn, 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return doCreateThread( fn, userData, threadId); 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectandroid_thread_id_t androidGetThreadId() 279edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 280edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (android_thread_id_t)GetCurrentThreadId(); 281edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 282edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 283edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 284edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Threads not supported" 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 290edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThread(android_thread_func_t fn, void* arg) 291edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return createThreadEtc(fn, arg); 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThreadGetID(android_thread_func_t fn, void *arg, android_thread_id_t *id) 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 297edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return createThreadEtc(fn, arg, "android:unnamed_thread", 298edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project PRIORITY_DEFAULT, 0, id); 299edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 300edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 301edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic android_create_thread_fn gCreateThreadFn = androidCreateRawThreadEtc; 302edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 303edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThreadEtc(android_thread_func_t entryFunction, 304edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 305edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 306edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 307edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 308edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 309edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 310edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gCreateThreadFn(entryFunction, userData, threadName, 311edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project threadPriority, threadStackSize, threadId); 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 314edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid androidSetCreateThreadFunc(android_create_thread_fn func) 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 316edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project gCreateThreadFn = func; 317edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 318edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 3198c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornpid_t androidGetTid() 3208c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3218c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#ifdef HAVE_GETTID 3228c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return gettid(); 3238c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#else 3248c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return getpid(); 3258c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn#endif 3268c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3278c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3280818b0921ef6cda07f41b56d2ef19b2849dfefd1Jeff Brown#ifdef HAVE_ANDROID_OS 3298c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackbornint androidSetThreadPriority(pid_t tid, int pri) 3308c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn{ 3318c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn int rc = 0; 332d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn 333d0aeccebe2d1539a9f0b5f19beb6c272a60d3cc6Dianne Hackborn#if defined(HAVE_PTHREADS) 3348c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn int lasterr = 0; 3358c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3367b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup); 3377b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (gDoSchedulingGroup) { 338f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten // set_sched_policy does not support tid == 0 339f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten int policy_tid; 340f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten if (tid == 0) { 341f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten policy_tid = androidGetTid(); 342f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten } else { 343f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten policy_tid = tid; 344f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten } 3457b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn if (pri >= ANDROID_PRIORITY_BACKGROUND) { 346f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten rc = set_sched_policy(policy_tid, SP_BACKGROUND); 3477b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) { 348f0c412513ff0efe0df40325d98a99de7634548eeGlenn Kasten rc = set_sched_policy(policy_tid, SP_FOREGROUND); 3497b0d45c3465304ccdd29ad20f43270ffd5a6aec0Dianne Hackborn } 3508c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3518c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3528c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (rc) { 3538c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn lasterr = errno; 3548c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 3558c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3568c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn if (setpriority(PRIO_PROCESS, tid, pri) < 0) { 3578c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn rc = INVALID_OPERATION; 3588c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } else { 3598c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn errno = lasterr; 3608c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn } 361c5b138995e68910cfa95f88f12a1c69a102aa997Dianne Hackborn#endif 3628c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3638c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn return rc; 3648c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn} 3658c6cedc9bc9a4b69616a79a95449f6f6b08c7bf1Dianne Hackborn 3661d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huberint androidGetThreadPriority(pid_t tid) { 3679dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#if defined(HAVE_PTHREADS) 3681d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber return getpriority(PRIO_PROCESS, tid); 3699dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#else 3709dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber return ANDROID_PRIORITY_NORMAL; 3719dbb77d04b12a3f45ebd156087f6ccb478b35a87Andreas Huber#endif 3721d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber} 3731d60b9629c022811e5efca71eb4d03f8b16a4cb0Andreas Huber 3740818b0921ef6cda07f41b56d2ef19b2849dfefd1Jeff Brown#endif 3754fb24275919aab88d0ce346f530c9911d6c08422Glenn Kasten 376edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 377edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 378edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 379edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 380edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Mutex class 381edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 382edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 383edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 384ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 385ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 386edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 387edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 388edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex() 389edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 390edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 391edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 392edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project assert(sizeof(hMutex) == sizeof(mState)); 393edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 394edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 395edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 396edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 397edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 398edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex(const char* name) 399edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 400edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX: name not used for now 401edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 402edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 403429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 404429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 405429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner hMutex = CreateMutex(NULL, FALSE, NULL); 406429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner mState = (void*) hMutex; 407429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner} 408429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 409429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' TurnerMutex::Mutex(int type, const char* name) 410429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner{ 411429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner // XXX: type and name not used for now 412429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex; 413429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 414429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 415429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 416edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 417edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 418edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 419edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 420edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::~Mutex() 421edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 422edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle((HANDLE) mState); 423edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 424edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 425edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::lock() 426edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 427edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 428edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, INFINITE); 429edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return dwWaitResult != WAIT_OBJECT_0 ? -1 : NO_ERROR; 430edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 431edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 432edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Mutex::unlock() 433edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 434edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!ReleaseMutex((HANDLE) mState)) 4359f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: bad result from unlocking mutex\n"); 436edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 437edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 438edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::tryLock() 439edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 440edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 441edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 442edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, 0); 443edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (dwWaitResult != WAIT_OBJECT_0 && dwWaitResult != WAIT_TIMEOUT) 4449f760150f6e0f39b9923cfdc875373606839ee00Steve Block ALOG(LOG_WARN, "thread", "WARNING: bad result from try-locking mutex\n"); 445edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (dwWaitResult == WAIT_OBJECT_0) ? 0 : -1; 446edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 447edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 448edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 449edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Somebody forgot to implement threads for this platform." 450edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 451edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 452edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 453edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 454edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 455edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Condition class 456edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 457edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 458edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 459ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 460ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 461edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 462edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 463edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 464edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Windows doesn't have a condition variable solution. It's possible 465edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to create one, but it's easy to get it wrong. For a discussion, and 466edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * the origin of this implementation, see: 467edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 468edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.cs.wustl.edu/~schmidt/win32-cv-1.html 469edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 470edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * The implementation shown on the page does NOT follow POSIX semantics. 471edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * As an optimization they require acquiring the external mutex before 472edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * calling signal() and broadcast(), whereas POSIX only requires grabbing 473edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * it before calling wait(). The implementation here has been un-optimized 474edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to have the correct behavior. 475edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 476edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projecttypedef struct WinCondition { 477edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Number of waiting threads. 478edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int waitersCount; 479edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 480edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Serialize access to waitersCount. 481edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CRITICAL_SECTION waitersCountLock; 482edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 483edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Semaphore used to queue up threads waiting for the condition to 484edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // become signaled. 485edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE sema; 486edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 487edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // An auto-reset event used by the broadcast/signal thread to wait 488edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // for all the waiting thread(s) to wake up and be released from 489edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // the semaphore. 490edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE waitersDone; 491edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 492edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This mutex wouldn't be necessary if we required that the caller 493edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lock the external mutex before calling signal() and broadcast(). 494edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // I'm trying to mimic pthread semantics though. 495edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE internalMutex; 496edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 497edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Keeps track of whether we were broadcasting or signaling. This 498edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // allows us to optimize the code if we're just signaling. 499edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool wasBroadcast; 500edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 501edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t wait(WinCondition* condState, HANDLE hMutex, nsecs_t* abstime) 502edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 503edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Increment the wait count, avoiding race conditions. 504edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 505edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount++; 506edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: incr waitersCount to %d (tid=%ld)\n", 507edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // condState->waitersCount, getThreadId()); 508edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 509edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 510edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD timeout = INFINITE; 511edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (abstime) { 512edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project nsecs_t reltime = *abstime - systemTime(); 513edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (reltime < 0) 514edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project reltime = 0; 515edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project timeout = reltime/1000000; 516edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 517edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 518edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically release the external mutex and wait on the semaphore. 519edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD res = 520edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(hMutex, condState->sema, timeout, FALSE); 521edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 522edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: awake (tid=%ld)\n", getThreadId()); 523edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 524edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reacquire lock to avoid race conditions. 525edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 526edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 527edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // No longer waiting. 528edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount--; 529edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 530edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Check to see if we're the last waiter after a broadcast. 531edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool lastWaiter = (condState->wasBroadcast && condState->waitersCount == 0); 532edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 533edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: lastWaiter=%d (wasBc=%d wc=%d)\n", 534edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lastWaiter, condState->wasBroadcast, condState->waitersCount); 535edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 536edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 537edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 538edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If we're the last waiter thread during this particular broadcast 539edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // then signal broadcast() that we're all awake. It'll drop the 540edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // internal mutex. 541edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (lastWaiter) { 542edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically signal the "waitersDone" event and wait until we 543edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // can acquire the internal mutex. We want to do this in one step 544edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // because it ensures that everybody is in the mutex FIFO before 545edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // any thread has a chance to run. Without it, another thread 546edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // could wake up, do work, and hop back in ahead of us. 547edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(condState->waitersDone, condState->internalMutex, 548edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project INFINITE, FALSE); 549edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 550edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Grab the internal mutex. 551edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 552edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 553edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 554edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release the internal and grab the external. 555edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 556edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(hMutex, INFINITE); 557edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 558edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return res == WAIT_OBJECT_0 ? NO_ERROR : -1; 559edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 560edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} WinCondition; 561edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 562edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 563edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Constructor. Set up the WinCondition stuff. 564edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 565edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::Condition() 566edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 567edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = new WinCondition; 568edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 569edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount = 0; 570edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = false; 571edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // semaphore: no security, initial value of 0 572edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->sema = CreateSemaphore(NULL, 0, 0x7fffffff, NULL); 573edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project InitializeCriticalSection(&condState->waitersCountLock); 574edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // auto-reset event, not signaled initially 575edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersDone = CreateEvent(NULL, FALSE, FALSE, NULL); 576edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // used so we don't have to lock external mutex on signal/broadcast 577edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->internalMutex = CreateMutex(NULL, FALSE, NULL); 578edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 579edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = condState; 580edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 581edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 582edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 583edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Destructor. Free Windows resources as well as our allocated storage. 584edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 585edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::~Condition() 586edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 587edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 588edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState != NULL) { 589edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->sema); 590edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->waitersDone); 591edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete condState; 592edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 593edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 594edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 595edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 596edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::wait(Mutex& mutex) 597edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 598edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 599edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex = (HANDLE) mutex.mState; 600edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 601edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return ((WinCondition*)mState)->wait(condState, hMutex, NULL); 602edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 603edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 604edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::waitRelative(Mutex& mutex, nsecs_t reltime) 605edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 606429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner WinCondition* condState = (WinCondition*) mState; 607429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex = (HANDLE) mutex.mState; 608429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner nsecs_t absTime = systemTime()+reltime; 609429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 610429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner return ((WinCondition*)mState)->wait(condState, hMutex, &absTime); 611edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 612edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 613edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 614edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing one thread to continue. 615edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 616edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::signal() 617edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 618edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 619edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 620edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This ensures that we don't clash with 621edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // broadcast(). 622edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 623edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 624edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 625edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = (condState->waitersCount > 0); 626edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 627edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 628edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If no waiters, then this is a no-op. Otherwise, knock the semaphore 629edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // down a notch. 630edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) 631edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, 1, 0); 632edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 633edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 634edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 635edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 636edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 637edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 638edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing all threads to continue. 639edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 640edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * First we have to wake up all threads waiting on the semaphore, then 641edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * we wait until all of the threads have actually been woken before 642edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * releasing the internal mutex. This ensures that all threads are woken. 643edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 644edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::broadcast() 645edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 646edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 647edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 648edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This keeps the guys we're waking up 649edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // from getting too far. 650edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 651edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 652edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 653edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = false; 654edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 655edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState->waitersCount > 0) { 656edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project haveWaiters = true; 657edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = true; 658edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 659edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 660edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) { 661edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wake up all the waiters. 662edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, condState->waitersCount, 0); 663edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 664edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 665edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 666edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wait for all awakened threads to acquire the counting semaphore. 667edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // The last guy who was waiting sets this. 668edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->waitersDone, INFINITE); 669edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 670edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reset wasBroadcast. (No crit section needed because nobody 671edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // else can wake up to poke at it.) 672edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = 0; 673edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 674edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // nothing to do 675edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 676edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 677edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 678edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 679edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 680edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 681edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 682edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 683edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "condition variables not supported on this platform" 684edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 685edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 686edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 687edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 688edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 689edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * This is our thread object! 690edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 691edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 692edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::Thread(bool canCallJava) 693edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mCanCallJava(canCallJava), 694edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread(thread_id_t(-1)), 695edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock("Thread::mLock"), 696edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus(NO_ERROR), 697edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending(false), mRunning(false) 6987e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten#ifdef HAVE_ANDROID_OS 6997e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten , mTid(-1) 7007e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten#endif 701edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 702edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 703edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 704edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::~Thread() 705edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 706edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 707edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 708edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::readyToRun() 709edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 710edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 711edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 712edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 713edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::run(const char* name, int32_t priority, size_t stack) 714edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 715edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(mLock); 716edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 717edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mRunning) { 718edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // thread already started 719edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return INVALID_OPERATION; 720edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 721edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 722edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reset status and exitPending to their default value, so we can 723edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // try again after an error happened (either below, or in readyToRun()) 724edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = NO_ERROR; 725edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = false; 726edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 727edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 728edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // hold a strong reference on ourself 729edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mHoldSelf = this; 730edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 7319adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mRunning = true; 7329adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 733edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool res; 734edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mCanCallJava) { 735edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = createThreadEtc(_threadLoop, 736edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 737edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 738edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = androidCreateRawThreadEtc(_threadLoop, 739edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 740edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 741edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 742edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (res == false) { 743edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = UNKNOWN_ERROR; // something happened! 744edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mRunning = false; 745edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 7469adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mHoldSelf.clear(); // "this" may have gone away after this. 7479adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 7489adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return UNKNOWN_ERROR; 749edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 750edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 7519adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Do not refer to mStatus here: The thread is already running (may, in fact 7529adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // already have exited with a valid mStatus result). The NO_ERROR indication 7539adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // here merely indicates successfully starting the thread and does not 7549adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // imply successful termination/execution. 7559adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return NO_ERROR; 7567e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten 7577e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // Exiting scope of mLock is a memory barrier and allows new thread to run 758edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 759edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 760edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint Thread::_threadLoop(void* user) 761edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 762edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Thread* const self = static_cast<Thread*>(user); 7637e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten 764edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> strong(self->mHoldSelf); 765edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<Thread> weak(strong); 766edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mHoldSelf.clear(); 767edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 768af1cf07134dccc884c654da0e713c9213d7be3f4Kenny Root#ifdef HAVE_ANDROID_OS 7694de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // this is very useful for debugging with gdb 7704de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mTid = gettid(); 7714de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian#endif 7724de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian 7739adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool first = true; 774edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 775edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project do { 7769adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool result; 7779adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (first) { 7789adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project first = false; 7799adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project self->mStatus = self->readyToRun(); 7809adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = (self->mStatus == NO_ERROR); 7819adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 7827e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten if (result && !self->exitPending()) { 7839adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Binder threads (and maybe others) rely on threadLoop 7849adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // running at least once after a successful ::readyToRun() 7859adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (unless, of course, the thread has already been asked to exit 7869adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // at that point). 7879adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // This is because threads are essentially used like this: 7889adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (new ThreadSubclass())->run(); 7899adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // The caller therefore does not retain a strong reference to 7909adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // the thread and the thread would simply disappear after the 7919adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // successful ::readyToRun() call instead of entering the 7929adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // threadLoop at least once. 7939adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 7949adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 7959adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } else { 7969adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 7979adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 7989adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 7997e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // establish a scope for mLock 8007e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten { 8017e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(self->mLock); 802edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == false || self->mExitPending) { 803edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mExitPending = true; 804edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mRunning = false; 805a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent // clear thread ID so that requestExitAndWait() does not exit if 806a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent // called by a new thread using the same thread ID as this one. 807a017d5b37968b2a70d8c25846bfeb9b35d0f7e9dEric Laurent self->mThread = thread_id_t(-1); 8087e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // note that interested observers blocked in requestExitAndWait are 8097e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // awoken by broadcast, but blocked on mLock until break exits scope 8104de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mThreadExitedCondition.broadcast(); 811edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project break; 812edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 8137e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten } 814edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 815edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release our strong reference, to let a chance to the thread 816edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to die a peaceful death. 817edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong.clear(); 8184de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // And immediately, re-acquire a strong reference for the next loop 819edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong = weak.promote(); 820edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } while(strong != 0); 821edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 822edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 823edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 824edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 825edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Thread::requestExit() 826edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 8277e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(mLock); 828edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = true; 829edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 830edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 831edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::requestExitAndWait() 832edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 833d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten Mutex::Autolock _l(mLock); 8349adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (mThread == getThreadId()) { 83532397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW( 8369adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread (this=%p): don't call waitForExit() from this " 8379adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread object's thread. It's a guaranteed deadlock!", 8389adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project this); 839edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 8409adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return WOULD_BLOCK; 841edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 8429adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 843d9e1bb76fe1e01fb79bb65959b92051aa18fddbeGlenn Kasten mExitPending = true; 8449adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 8459adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project while (mRunning == true) { 8469adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mThreadExitedCondition.wait(mLock); 8479adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 8487e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // This next line is probably not needed any more, but is being left for 8497e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten // historical reference. Note that each interested party will clear flag. 8509adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mExitPending = false; 8519adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 852edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mStatus; 853edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 854edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 85558e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kastenstatus_t Thread::join() 85658e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten{ 85758e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten Mutex::Autolock _l(mLock); 85858e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten if (mThread == getThreadId()) { 85932397c1cd3327905173b36baa6fd1c579bc328ffSteve Block ALOGW( 86058e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten "Thread (this=%p): don't call join() from this " 86158e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten "Thread object's thread. It's a guaranteed deadlock!", 86258e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten this); 86358e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 86458e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten return WOULD_BLOCK; 86558e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten } 86658e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 86758e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten while (mRunning == true) { 86858e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten mThreadExitedCondition.wait(mLock); 86958e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten } 87058e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 87158e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten return mStatus; 87258e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten} 87358e012d1e37e1272d43c9ff0f56c9b236dd1d7f1Glenn Kasten 874ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#ifdef HAVE_ANDROID_OS 875ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kastenpid_t Thread::getTid() const 876ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten{ 877ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten // mTid is not defined until the child initializes it, and the caller may need it earlier 878ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten Mutex::Autolock _l(mLock); 879ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten pid_t tid; 880ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten if (mRunning) { 881ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten pthread_t pthread = android_thread_id_t_to_pthread(mThread); 882ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten tid = __pthread_gettid(pthread); 883ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten } else { 884ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten ALOGW("Thread (this=%p): getTid() is undefined before run()", this); 885ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten tid = -1; 886ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten } 887ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten return tid; 888ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten} 889ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten#endif 890ba699cb0f7f95f665593541d2b37e12fb10b85f1Glenn Kasten 891edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool Thread::exitPending() const 892edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 8937e453a51a5436c6c8c49c1e37cea5077bce09405Glenn Kasten Mutex::Autolock _l(mLock); 894edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mExitPending; 895edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 896edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 897edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 898edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 899edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 900