1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef _LIBS_CUTILS_THREADS_H 18#define _LIBS_CUTILS_THREADS_H 19 20#ifdef __cplusplus 21extern "C" { 22#endif 23 24/***********************************************************************/ 25/***********************************************************************/ 26/***** *****/ 27/***** local thread storage *****/ 28/***** *****/ 29/***********************************************************************/ 30/***********************************************************************/ 31 32#ifdef HAVE_PTHREADS 33 34#include <pthread.h> 35 36typedef struct { 37 pthread_mutex_t lock; 38 int has_tls; 39 pthread_key_t tls; 40 41} thread_store_t; 42 43#define THREAD_STORE_INITIALIZER { PTHREAD_MUTEX_INITIALIZER, 0, 0 } 44 45#elif defined HAVE_WIN32_THREADS 46 47#include <windows.h> 48 49typedef struct { 50 int lock_init; 51 int has_tls; 52 DWORD tls; 53 CRITICAL_SECTION lock; 54 55} thread_store_t; 56 57#define THREAD_STORE_INITIALIZER { 0, 0, 0, {0, 0, 0, 0, 0, 0} } 58 59#else 60# error "no thread_store_t implementation for your platform !!" 61#endif 62 63typedef void (*thread_store_destruct_t)(void* value); 64 65extern void* thread_store_get(thread_store_t* store); 66 67extern void thread_store_set(thread_store_t* store, 68 void* value, 69 thread_store_destruct_t destroy); 70 71/***********************************************************************/ 72/***********************************************************************/ 73/***** *****/ 74/***** mutexes *****/ 75/***** *****/ 76/***********************************************************************/ 77/***********************************************************************/ 78 79#ifdef HAVE_PTHREADS 80 81typedef pthread_mutex_t mutex_t; 82 83#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER 84 85static __inline__ void mutex_lock(mutex_t* lock) 86{ 87 pthread_mutex_lock(lock); 88} 89static __inline__ void mutex_unlock(mutex_t* lock) 90{ 91 pthread_mutex_unlock(lock); 92} 93static __inline__ int mutex_init(mutex_t* lock) 94{ 95 return pthread_mutex_init(lock, NULL); 96} 97static __inline__ void mutex_destroy(mutex_t* lock) 98{ 99 pthread_mutex_destroy(lock); 100} 101#endif 102 103#ifdef HAVE_WIN32_THREADS 104typedef struct { 105 int init; 106 CRITICAL_SECTION lock[1]; 107} mutex_t; 108 109#define MUTEX_INITIALIZER { 0, {{ NULL, 0, 0, NULL, NULL, 0 }} } 110 111static __inline__ void mutex_lock(mutex_t* lock) 112{ 113 if (!lock->init) { 114 lock->init = 1; 115 InitializeCriticalSection( lock->lock ); 116 lock->init = 2; 117 } else while (lock->init != 2) 118 Sleep(10); 119 120 EnterCriticalSection(lock->lock); 121} 122 123static __inline__ void mutex_unlock(mutex_t* lock) 124{ 125 LeaveCriticalSection(lock->lock); 126} 127static __inline__ int mutex_init(mutex_t* lock) 128{ 129 InitializeCriticalSection(lock->lock); 130 lock->init = 2; 131 return 0; 132} 133static __inline__ void mutex_destroy(mutex_t* lock) 134{ 135 if (lock->init) { 136 lock->init = 0; 137 DeleteCriticalSection(lock->lock); 138 } 139} 140#endif 141 142#ifdef __cplusplus 143} 144#endif 145 146#endif /* _LIBS_CUTILS_THREADS_H */ 147