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113 lines
2.6 KiB
113 lines
2.6 KiB
/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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#include "paddle/utils/Locks.h"
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#include "paddle/utils/Logging.h"
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#include <dispatch/dispatch.h>
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#include <libkern/OSAtomic.h>
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namespace paddle {
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class SemaphorePrivate {
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public:
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~SemaphorePrivate() {
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dispatch_release(sem);
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}
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dispatch_semaphore_t sem;
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};
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Semaphore::Semaphore(int initValue): m(new SemaphorePrivate()) {
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m->sem = dispatch_semaphore_create(initValue);
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}
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Semaphore::~Semaphore() {
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delete m;
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}
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bool Semaphore::timeWait(timespec *ts) {
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dispatch_time_t tm = dispatch_walltime(ts, 0);
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return (0 == dispatch_semaphore_wait(m->sem, tm));
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}
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void Semaphore::wait() {
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dispatch_semaphore_wait(m->sem, DISPATCH_TIME_FOREVER);
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}
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void Semaphore::post() {
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dispatch_semaphore_signal(m->sem);
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}
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class SpinLockPrivate {
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public:
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SpinLockPrivate(): lock_(OS_SPINLOCK_INIT) {}
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OSSpinLock lock_;
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char padding_[64 - sizeof(OSSpinLock)]; // Padding to cache line size
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};
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SpinLock::SpinLock(): m(new SpinLockPrivate()) {}
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SpinLock::~SpinLock() { delete m; }
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void SpinLock::lock() {
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OSSpinLockLock(&m->lock_);
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}
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void SpinLock::unlock() {
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OSSpinLockUnlock(&m->lock_);
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}
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class ThreadBarrierPrivate {
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public:
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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int count;
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int tripCount;
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inline explicit ThreadBarrierPrivate(int cnt):count(0), tripCount(cnt) {
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CHECK_NE(cnt, 0);
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CHECK_GE(pthread_mutex_init(&mutex, 0), 0);
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CHECK_GE(pthread_cond_init(&cond, 0), 0);
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}
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inline ~ThreadBarrierPrivate() {
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pthread_cond_destroy(&cond);
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pthread_mutex_destroy(&mutex);
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}
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/**
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* @brief wait
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* @return true if the last wait
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*/
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inline bool wait() {
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pthread_mutex_lock(&mutex);
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++count;
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if (count >= tripCount) {
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count = 0;
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pthread_cond_broadcast(&cond);
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pthread_mutex_unlock(&mutex);
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return true;
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} else {
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pthread_cond_wait(&cond, &mutex);
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pthread_mutex_unlock(&mutex);
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return false;
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}
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}
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};
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ThreadBarrier::ThreadBarrier(int count): m(new ThreadBarrierPrivate(count)) {}
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ThreadBarrier::~ThreadBarrier() { delete m; }
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void ThreadBarrier::wait() { m->wait(); }
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} // namespace paddle
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