Threads.cpp revision 4de4ebf6a25b5cf1819809ffcedea331d79823e0
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 23edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdio.h> 24edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdlib.h> 25edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <memory.h> 26edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <errno.h> 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <assert.h> 28edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <unistd.h> 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 30edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PTHREADS) 31edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <pthread.h> 32edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <sched.h> 33edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <sys/resource.h> 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <windows.h> 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <stdint.h> 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# include <process.h> 38edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project# define HAVE_CREATETHREAD // Cygwin, vs. HAVE__BEGINTHREADEX for MinGW 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PRCTL) 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/prctl.h> 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Thread wrappers 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectusing namespace android; 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PTHREADS) 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 56edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 57edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 58edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Create and run a new thead. 59edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 60edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * We create it "detached", so it cleans up after itself. 61edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 62edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 63edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projecttypedef void* (*android_pthread_entry)(void*); 64edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 65edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstruct thread_data_t { 66edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_func_t entryFunction; 67edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* userData; 68edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int priority; 69edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char * threadName; 70edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 71edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // we use this trampoline when we need to set the priority with 72edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // nice/setpriority. 73edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project static int trampoline(const thread_data_t* t) { 74edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_func_t f = t->entryFunction; 75edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* u = t->userData; 76edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int prio = t->priority; 77edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char * name = t->threadName; 78edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete t; 79edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project setpriority(PRIO_PROCESS, 0, prio); 80edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (name) { 81edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_PRCTL) 82edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Mac OS doesn't have this, and we build libutil for the host too 83edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int hasAt = 0; 84edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int hasDot = 0; 85edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project char *s = name; 86edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project while (*s) { 87edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (*s == '.') hasDot = 1; 88edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project else if (*s == '@') hasAt = 1; 89edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s++; 90edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 91edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int len = s - name; 92edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (len < 15 || hasAt || !hasDot) { 93edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s = name; 94edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 95edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project s = name + len - 15; 96edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 97edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project prctl(PR_SET_NAME, (unsigned long) s, 0, 0, 0); 98edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 99edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project free(name); 100edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 101edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return f(u); 102edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 103edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 104edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 105edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateRawThreadEtc(android_thread_func_t entryFunction, 106edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 107edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 108edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 109edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 110edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 111edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 112edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_t attr; 113edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_init(&attr); 114edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); 115edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 116edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#ifdef HAVE_ANDROID_OS /* valgrind is rejecting RT-priority create reqs */ 117edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadPriority != PRIORITY_DEFAULT || threadName != NULL) { 118edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // We could avoid the trampoline if there was a way to get to the 119edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // android_thread_id_t (pid) from pthread_t 120edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project thread_data_t* t = new thread_data_t; 121edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->priority = threadPriority; 122edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->threadName = threadName ? strdup(threadName) : NULL; 123edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->entryFunction = entryFunction; 124edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project t->userData = userData; 125edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project entryFunction = (android_thread_func_t)&thread_data_t::trampoline; 126edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project userData = t; 127edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 128edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 129edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 130edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadStackSize) { 131edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_attr_setstacksize(&attr, threadStackSize); 132edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 133edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 134edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project errno = 0; 135edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pthread_t thread; 136edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int result = pthread_create(&thread, &attr, 137edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (android_pthread_entry)entryFunction, userData); 138edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result != 0) { 139edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOGE("androidCreateRawThreadEtc failed (entry=%p, res=%d, errno=%d)\n" 140edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project "(android threadPriority=%d)", 141edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project entryFunction, result, errno, threadPriority); 142edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 143edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 144edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 145edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (threadId != NULL) { 146edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project *threadId = (android_thread_id_t)thread; // XXX: this is not portable 147edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 148edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 1; 149edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 150edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 151edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectandroid_thread_id_t androidGetThreadId() 152edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 153edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (android_thread_id_t)pthread_self(); 154edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 155edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 156edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 157edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 158edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 159edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 160edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 161edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Trampoline to make us __stdcall-compliant. 162edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 163edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * We're expected to delete "vDetails" when we're done. 164edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 165edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstruct threadDetails { 166edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int (*func)(void*); 167edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void* arg; 168edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 169edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic __stdcall unsigned int threadIntermediary(void* vDetails) 170edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 171edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct threadDetails* pDetails = (struct threadDetails*) vDetails; 172edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int result; 173edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 174edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project result = (*(pDetails->func))(pDetails->arg); 175edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 176edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete pDetails; 177edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 178edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOG(LOG_VERBOSE, "thread", "thread exiting\n"); 179edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (unsigned int) result; 180edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 181edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 182edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 183edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Create and run a new thread. 184edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 185edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic bool doCreateThread(android_thread_func_t fn, void* arg, android_thread_id_t *id) 186edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 187edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hThread; 188edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project struct threadDetails* pDetails = new threadDetails; // must be on heap 189edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project unsigned int thrdaddr; 190edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 191edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pDetails->func = fn; 192edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project pDetails->arg = arg; 193edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 194edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE__BEGINTHREADEX) 195edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hThread = (HANDLE) _beginthreadex(NULL, 0, threadIntermediary, pDetails, 0, 196edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project &thrdaddr); 197edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (hThread == 0) 198edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_CREATETHREAD) 199edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hThread = CreateThread(NULL, 0, 200edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (LPTHREAD_START_ROUTINE) threadIntermediary, 201edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project (void*) pDetails, 0, (DWORD*) &thrdaddr); 202edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (hThread == NULL) 203edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 204edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 205edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOG(LOG_WARN, "thread", "WARNING: thread create failed\n"); 206edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return false; 207edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 208edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 209edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#if defined(HAVE_CREATETHREAD) 210edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project /* close the management handle */ 211edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(hThread); 212edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 213edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 214edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (id != NULL) { 215edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project *id = (android_thread_id_t)thrdaddr; 216edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 217edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 218edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return true; 219edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 220edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 221edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateRawThreadEtc(android_thread_func_t fn, 222edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 223edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 224edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 225edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 226edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 227edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 228edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return doCreateThread( fn, userData, threadId); 229edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 230edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 231edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectandroid_thread_id_t androidGetThreadId() 232edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 233edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (android_thread_id_t)GetCurrentThreadId(); 234edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 235edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 236edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 237edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 238edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Threads not supported" 239edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 240edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 241edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 242edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 243edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThread(android_thread_func_t fn, void* arg) 244edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 245edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return createThreadEtc(fn, arg); 246edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 247edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 248edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThreadGetID(android_thread_func_t fn, void *arg, android_thread_id_t *id) 249edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 250edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return createThreadEtc(fn, arg, "android:unnamed_thread", 251edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project PRIORITY_DEFAULT, 0, id); 252edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 253edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 254edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatic android_create_thread_fn gCreateThreadFn = androidCreateRawThreadEtc; 255edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 256edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint androidCreateThreadEtc(android_thread_func_t entryFunction, 257edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void *userData, 258edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project const char* threadName, 259edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int32_t threadPriority, 260edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project size_t threadStackSize, 261edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project android_thread_id_t *threadId) 262edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 263edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return gCreateThreadFn(entryFunction, userData, threadName, 264edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project threadPriority, threadStackSize, threadId); 265edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 266edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 267edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid androidSetCreateThreadFunc(android_create_thread_fn func) 268edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 269edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project gCreateThreadFn = func; 270edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 271edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 272edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 273edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 274edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 275edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 276edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Mutex class 277edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 278edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 279edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 280ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 281ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 282edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 283edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 284edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex() 285edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 286edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 287edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 288edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project assert(sizeof(hMutex) == sizeof(mState)); 289edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 290edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 291edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 292edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 293edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 294edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::Mutex(const char* name) 295edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 296edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // XXX: name not used for now 297edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex; 298edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 299429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 300429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 301429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner hMutex = CreateMutex(NULL, FALSE, NULL); 302429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner mState = (void*) hMutex; 303429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner} 304429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 305429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' TurnerMutex::Mutex(int type, const char* name) 306429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner{ 307429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner // XXX: type and name not used for now 308429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex; 309429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 310429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner assert(sizeof(hMutex) == sizeof(mState)); 311429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 312edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project hMutex = CreateMutex(NULL, FALSE, NULL); 313edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = (void*) hMutex; 314edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 315edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 316edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectMutex::~Mutex() 317edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 318edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle((HANDLE) mState); 319edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 320edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 321edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::lock() 322edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 323edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 324edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, INFINITE); 325edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return dwWaitResult != WAIT_OBJECT_0 ? -1 : NO_ERROR; 326edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 327edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 328edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Mutex::unlock() 329edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 330edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (!ReleaseMutex((HANDLE) mState)) 331edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOG(LOG_WARN, "thread", "WARNING: bad result from unlocking mutex\n"); 332edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 333edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 334edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Mutex::tryLock() 335edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 336edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD dwWaitResult; 337edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 338edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project dwWaitResult = WaitForSingleObject((HANDLE) mState, 0); 339edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (dwWaitResult != WAIT_OBJECT_0 && dwWaitResult != WAIT_TIMEOUT) 340edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LOG(LOG_WARN, "thread", "WARNING: bad result from try-locking mutex\n"); 341edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return (dwWaitResult == WAIT_OBJECT_0) ? 0 : -1; 342edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 343edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 344edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 345edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "Somebody forgot to implement threads for this platform." 346edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 347edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 348edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 349edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 350edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 351edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Condition class 352edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * =========================================================================== 353edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 354edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 355ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian#if defined(HAVE_PTHREADS) 356ec0f1f6720cd7ecffab54b0dfc2553b55a38e50fMathias Agopian// implemented as inlines in threads.h 357edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#elif defined(HAVE_WIN32_THREADS) 358edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 359edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 360edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Windows doesn't have a condition variable solution. It's possible 361edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to create one, but it's easy to get it wrong. For a discussion, and 362edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * the origin of this implementation, see: 363edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 364edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.cs.wustl.edu/~schmidt/win32-cv-1.html 365edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 366edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * The implementation shown on the page does NOT follow POSIX semantics. 367edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * As an optimization they require acquiring the external mutex before 368edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * calling signal() and broadcast(), whereas POSIX only requires grabbing 369edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * it before calling wait(). The implementation here has been un-optimized 370edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * to have the correct behavior. 371edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 372edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projecttypedef struct WinCondition { 373edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Number of waiting threads. 374edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project int waitersCount; 375edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 376edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Serialize access to waitersCount. 377edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CRITICAL_SECTION waitersCountLock; 378edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 379edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Semaphore used to queue up threads waiting for the condition to 380edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // become signaled. 381edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE sema; 382edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 383edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // An auto-reset event used by the broadcast/signal thread to wait 384edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // for all the waiting thread(s) to wake up and be released from 385edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // the semaphore. 386edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE waitersDone; 387edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 388edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // This mutex wouldn't be necessary if we required that the caller 389edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lock the external mutex before calling signal() and broadcast(). 390edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // I'm trying to mimic pthread semantics though. 391edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE internalMutex; 392edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 393edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Keeps track of whether we were broadcasting or signaling. This 394edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // allows us to optimize the code if we're just signaling. 395edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool wasBroadcast; 396edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 397edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project status_t wait(WinCondition* condState, HANDLE hMutex, nsecs_t* abstime) 398edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project { 399edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Increment the wait count, avoiding race conditions. 400edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 401edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount++; 402edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: incr waitersCount to %d (tid=%ld)\n", 403edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // condState->waitersCount, getThreadId()); 404edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 405edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 406edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD timeout = INFINITE; 407edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (abstime) { 408edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project nsecs_t reltime = *abstime - systemTime(); 409edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (reltime < 0) 410edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project reltime = 0; 411edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project timeout = reltime/1000000; 412edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 413edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 414edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically release the external mutex and wait on the semaphore. 415edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project DWORD res = 416edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(hMutex, condState->sema, timeout, FALSE); 417edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 418edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: awake (tid=%ld)\n", getThreadId()); 419edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 420edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reacquire lock to avoid race conditions. 421edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 422edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 423edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // No longer waiting. 424edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount--; 425edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 426edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Check to see if we're the last waiter after a broadcast. 427edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool lastWaiter = (condState->wasBroadcast && condState->waitersCount == 0); 428edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 429edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project //printf("+++ wait: lastWaiter=%d (wasBc=%d wc=%d)\n", 430edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // lastWaiter, condState->wasBroadcast, condState->waitersCount); 431edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 432edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 433edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 434edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If we're the last waiter thread during this particular broadcast 435edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // then signal broadcast() that we're all awake. It'll drop the 436edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // internal mutex. 437edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (lastWaiter) { 438edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Atomically signal the "waitersDone" event and wait until we 439edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // can acquire the internal mutex. We want to do this in one step 440edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // because it ensures that everybody is in the mutex FIFO before 441edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // any thread has a chance to run. Without it, another thread 442edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // could wake up, do work, and hop back in ahead of us. 443edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project SignalObjectAndWait(condState->waitersDone, condState->internalMutex, 444edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project INFINITE, FALSE); 445edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 446edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Grab the internal mutex. 447edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 448edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 449edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 450edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release the internal and grab the external. 451edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 452edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(hMutex, INFINITE); 453edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 454edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return res == WAIT_OBJECT_0 ? NO_ERROR : -1; 455edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 456edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} WinCondition; 457edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 458edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 459edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Constructor. Set up the WinCondition stuff. 460edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 461edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::Condition() 462edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 463edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = new WinCondition; 464edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 465edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersCount = 0; 466edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = false; 467edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // semaphore: no security, initial value of 0 468edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->sema = CreateSemaphore(NULL, 0, 0x7fffffff, NULL); 469edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project InitializeCriticalSection(&condState->waitersCountLock); 470edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // auto-reset event, not signaled initially 471edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->waitersDone = CreateEvent(NULL, FALSE, FALSE, NULL); 472edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // used so we don't have to lock external mutex on signal/broadcast 473edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->internalMutex = CreateMutex(NULL, FALSE, NULL); 474edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 475edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mState = condState; 476edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 477edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 478edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 479edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Destructor. Free Windows resources as well as our allocated storage. 480edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 481edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectCondition::~Condition() 482edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 483edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 484edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState != NULL) { 485edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->sema); 486edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project CloseHandle(condState->waitersDone); 487edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project delete condState; 488edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 489edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 490edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 491edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 492edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::wait(Mutex& mutex) 493edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 494edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 495edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project HANDLE hMutex = (HANDLE) mutex.mState; 496edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 497edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return ((WinCondition*)mState)->wait(condState, hMutex, NULL); 498edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 499edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 500edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Condition::waitRelative(Mutex& mutex, nsecs_t reltime) 501edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 502429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner WinCondition* condState = (WinCondition*) mState; 503429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner HANDLE hMutex = (HANDLE) mutex.mState; 504429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner nsecs_t absTime = systemTime()+reltime; 505429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner 506429db150affcc99b198fa0da52165fde4cd4cc7cDavid 'Digit' Turner return ((WinCondition*)mState)->wait(condState, hMutex, &absTime); 507edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 508edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 509edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 510edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing one thread to continue. 511edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 512edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::signal() 513edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 514edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 515edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 516edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This ensures that we don't clash with 517edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // broadcast(). 518edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 519edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 520edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 521edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = (condState->waitersCount > 0); 522edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 523edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 524edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // If no waiters, then this is a no-op. Otherwise, knock the semaphore 525edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // down a notch. 526edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) 527edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, 1, 0); 528edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 529edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 530edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 531edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 532edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 533edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 534edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Signal the condition variable, allowing all threads to continue. 535edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 536edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * First we have to wake up all threads waiting on the semaphore, then 537edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * we wait until all of the threads have actually been woken before 538edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * releasing the internal mutex. This ensures that all threads are woken. 539edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 540edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Condition::broadcast() 541edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 542edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WinCondition* condState = (WinCondition*) mState; 543edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 544edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Lock the internal mutex. This keeps the guys we're waking up 545edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // from getting too far. 546edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->internalMutex, INFINITE); 547edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 548edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project EnterCriticalSection(&condState->waitersCountLock); 549edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool haveWaiters = false; 550edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 551edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (condState->waitersCount > 0) { 552edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project haveWaiters = true; 553edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = true; 554edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 555edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 556edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (haveWaiters) { 557edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wake up all the waiters. 558edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseSemaphore(condState->sema, condState->waitersCount, 0); 559edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 560edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 561edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 562edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Wait for all awakened threads to acquire the counting semaphore. 563edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // The last guy who was waiting sets this. 564edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project WaitForSingleObject(condState->waitersDone, INFINITE); 565edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 566edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Reset wasBroadcast. (No crit section needed because nobody 567edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // else can wake up to poke at it.) 568edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project condState->wasBroadcast = 0; 569edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 570edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // nothing to do 571edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project LeaveCriticalSection(&condState->waitersCountLock); 572edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 573edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 574edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release internal mutex. 575edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project ReleaseMutex(condState->internalMutex); 576edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 577edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 578edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#else 579edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#error "condition variables not supported on this platform" 580edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif 581edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 582edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project// ---------------------------------------------------------------------------- 583edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 584edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 585edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * This is our thread object! 586edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 587edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 588edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::Thread(bool canCallJava) 589edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project : mCanCallJava(canCallJava), 590edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread(thread_id_t(-1)), 591edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mLock("Thread::mLock"), 592edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus(NO_ERROR), 593edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending(false), mRunning(false) 594edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 595edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 596edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 597edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source ProjectThread::~Thread() 598edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 599edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 600edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 601edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::readyToRun() 602edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 603edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return NO_ERROR; 604edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 605edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 606edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::run(const char* name, int32_t priority, size_t stack) 607edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 608edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(mLock); 609edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 610edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mRunning) { 611edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // thread already started 612edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return INVALID_OPERATION; 613edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 614edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 615edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // reset status and exitPending to their default value, so we can 616edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // try again after an error happened (either below, or in readyToRun()) 617edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = NO_ERROR; 618edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = false; 619edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 620edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 621edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // hold a strong reference on ourself 622edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mHoldSelf = this; 623edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 6249adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mRunning = true; 6259adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 626edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project bool res; 627edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (mCanCallJava) { 628edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = createThreadEtc(_threadLoop, 629edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 630edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } else { 631edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project res = androidCreateRawThreadEtc(_threadLoop, 632edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project this, name, priority, stack, &mThread); 633edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 634edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 635edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (res == false) { 636edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mStatus = UNKNOWN_ERROR; // something happened! 637edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mRunning = false; 638edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mThread = thread_id_t(-1); 6399adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mHoldSelf.clear(); // "this" may have gone away after this. 6409adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 6419adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return UNKNOWN_ERROR; 642edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 643edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 6449adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Do not refer to mStatus here: The thread is already running (may, in fact 6459adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // already have exited with a valid mStatus result). The NO_ERROR indication 6469adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // here merely indicates successfully starting the thread and does not 6479adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // imply successful termination/execution. 6489adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return NO_ERROR; 649edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 650edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 651edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectint Thread::_threadLoop(void* user) 652edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 653edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Thread* const self = static_cast<Thread*>(user); 654edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project sp<Thread> strong(self->mHoldSelf); 655edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project wp<Thread> weak(strong); 656edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mHoldSelf.clear(); 657edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 6584de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian#if HAVE_ANDROID_OS 6594de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // this is very useful for debugging with gdb 6604de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mTid = gettid(); 6614de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian#endif 6624de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian 6639adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool first = true; 664edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 665edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project do { 6669adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project bool result; 6679adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (first) { 6689adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project first = false; 6699adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project self->mStatus = self->readyToRun(); 6709adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = (self->mStatus == NO_ERROR); 6719adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 6729adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (result && !self->mExitPending) { 6739adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // Binder threads (and maybe others) rely on threadLoop 6749adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // running at least once after a successful ::readyToRun() 6759adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (unless, of course, the thread has already been asked to exit 6769adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // at that point). 6779adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // This is because threads are essentially used like this: 6789adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // (new ThreadSubclass())->run(); 6799adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // The caller therefore does not retain a strong reference to 6809adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // the thread and the thread would simply disappear after the 6819adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // successful ::readyToRun() call instead of entering the 6829adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project // threadLoop at least once. 6839adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 6849adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 6859adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } else { 6869adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project result = self->threadLoop(); 6879adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 6889adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 689edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project if (result == false || self->mExitPending) { 690edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mExitPending = true; 691edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mLock.lock(); 692edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mRunning = false; 6934de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian self->mThreadExitedCondition.broadcast(); 694edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project self->mLock.unlock(); 695edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project break; 696edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 697edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 698edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // Release our strong reference, to let a chance to the thread 699edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project // to die a peaceful death. 700edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong.clear(); 7014de4ebf6a25b5cf1819809ffcedea331d79823e0Mathias Agopian // And immediately, re-acquire a strong reference for the next loop 702edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project strong = weak.promote(); 703edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } while(strong != 0); 704edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 705edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return 0; 706edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 707edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 708edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectvoid Thread::requestExit() 709edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 710edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mExitPending = true; 711edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 712edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 713edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectstatus_t Thread::requestExitAndWait() 714edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 7159adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project if (mThread == getThreadId()) { 7169adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project LOGW( 7179adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread (this=%p): don't call waitForExit() from this " 7189adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project "Thread object's thread. It's a guaranteed deadlock!", 7199adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project this); 720edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 7219adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project return WOULD_BLOCK; 722edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 7239adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 7249adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project requestExit(); 7259adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 7269adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project Mutex::Autolock _l(mLock); 7279adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project while (mRunning == true) { 7289adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mThreadExitedCondition.wait(mLock); 7299adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project } 7309adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project mExitPending = false; 7319adf84a4b6735354893ff1e57c129f66d97d75eeThe Android Open Source Project 732edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mStatus; 733edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project} 734edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 735edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectbool Thread::exitPending() const 736edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 737edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project return mExitPending; 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}; // namespace android 743