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96 lines
2.1 KiB
96 lines
2.1 KiB
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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// TODO: switch to <mutex> and std::mutex when this code no longer needs
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// to compile for pre-C++11...
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#include <sys/types.h>
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#if !defined(_WIN32)
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#include <pthread.h>
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#else
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#include <windows.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(_WIN32)
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typedef pthread_mutex_t mutex_t;
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static __inline__ void mutex_lock(mutex_t* lock) {
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pthread_mutex_lock(lock);
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}
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static __inline__ void mutex_unlock(mutex_t* lock) {
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pthread_mutex_unlock(lock);
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}
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static __inline__ int mutex_init(mutex_t* lock) {
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return pthread_mutex_init(lock, NULL);
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}
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static __inline__ void mutex_destroy(mutex_t* lock) {
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pthread_mutex_destroy(lock);
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}
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#else // !defined(_WIN32)
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typedef struct {
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int init;
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CRITICAL_SECTION lock[1];
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} mutex_t;
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#define MUTEX_INITIALIZER { 0, {{ NULL, 0, 0, NULL, NULL, 0 }} }
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static __inline__ void mutex_lock(mutex_t* lock) {
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if (!lock->init) {
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lock->init = 1;
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InitializeCriticalSection( lock->lock );
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lock->init = 2;
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} else while (lock->init != 2) {
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Sleep(10);
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}
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EnterCriticalSection(lock->lock);
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}
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static __inline__ void mutex_unlock(mutex_t* lock) {
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LeaveCriticalSection(lock->lock);
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}
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static __inline__ int mutex_init(mutex_t* lock) {
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InitializeCriticalSection(lock->lock);
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lock->init = 2;
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return 0;
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}
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static __inline__ void mutex_destroy(mutex_t* lock) {
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if (lock->init) {
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lock->init = 0;
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DeleteCriticalSection(lock->lock);
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}
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}
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#endif // !defined(_WIN32)
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#ifdef __cplusplus
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}
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#endif
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