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133 lines
3.4 KiB
C++
133 lines
3.4 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/system_wrappers/source/condition_variable_posix.h"
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#include <errno.h>
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#if defined(WEBRTC_LINUX)
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#include <time.h>
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#else
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#include <sys/time.h>
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#endif
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#include "webrtc/system_wrappers/source/critical_section_posix.h"
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namespace webrtc {
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ConditionVariableWrapper* ConditionVariablePosix::Create() {
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ConditionVariablePosix* ptr = new ConditionVariablePosix;
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if (!ptr) {
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return NULL;
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}
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const int error = ptr->Construct();
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if (error) {
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delete ptr;
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return NULL;
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}
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return ptr;
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}
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ConditionVariablePosix::ConditionVariablePosix() {
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}
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int ConditionVariablePosix::Construct() {
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#ifdef WEBRTC_CLOCK_TYPE_REALTIME
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pthread_cond_init(&cond_, NULL);
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#else
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int result = 0;
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pthread_condattr_t cond_attr;
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result = pthread_condattr_init(&cond_attr);
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if (result != 0) {
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return -1;
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}
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result = pthread_condattr_setclock(&cond_attr, CLOCK_MONOTONIC);
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if (result != 0) {
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return -1;
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}
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result = pthread_cond_init(&cond_, &cond_attr);
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if (result != 0) {
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return -1;
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}
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result = pthread_condattr_destroy(&cond_attr);
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if (result != 0) {
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return -1;
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}
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#endif
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return 0;
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}
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ConditionVariablePosix::~ConditionVariablePosix() {
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pthread_cond_destroy(&cond_);
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}
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void ConditionVariablePosix::SleepCS(CriticalSectionWrapper& crit_sect) {
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CriticalSectionPosix* cs = reinterpret_cast<CriticalSectionPosix*>(
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&crit_sect);
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pthread_cond_wait(&cond_, &cs->mutex_);
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}
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bool ConditionVariablePosix::SleepCS(CriticalSectionWrapper& crit_sect,
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unsigned long max_time_inMS) {
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const unsigned long INFINITE = 0xFFFFFFFF;
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const int MILLISECONDS_PER_SECOND = 1000;
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#ifndef WEBRTC_LINUX
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const int MICROSECONDS_PER_MILLISECOND = 1000;
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#endif
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const int NANOSECONDS_PER_SECOND = 1000000000;
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const int NANOSECONDS_PER_MILLISECOND = 1000000;
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CriticalSectionPosix* cs = reinterpret_cast<CriticalSectionPosix*>(
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&crit_sect);
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if (max_time_inMS != INFINITE) {
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timespec ts;
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#ifndef WEBRTC_MAC
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#ifdef WEBRTC_CLOCK_TYPE_REALTIME
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clock_gettime(CLOCK_REALTIME, &ts);
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#else
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clock_gettime(CLOCK_MONOTONIC, &ts);
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#endif
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#else // WEBRTC_MAC
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struct timeval tv;
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gettimeofday(&tv, 0);
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ts.tv_sec = tv.tv_sec;
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ts.tv_nsec = tv.tv_usec * MICROSECONDS_PER_MILLISECOND;
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#endif
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ts.tv_sec += max_time_inMS / MILLISECONDS_PER_SECOND;
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ts.tv_nsec +=
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(max_time_inMS
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- ((max_time_inMS / MILLISECONDS_PER_SECOND) * MILLISECONDS_PER_SECOND))
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* NANOSECONDS_PER_MILLISECOND;
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if (ts.tv_nsec >= NANOSECONDS_PER_SECOND) {
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ts.tv_sec += ts.tv_nsec / NANOSECONDS_PER_SECOND;
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ts.tv_nsec %= NANOSECONDS_PER_SECOND;
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}
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const int res = pthread_cond_timedwait(&cond_, &cs->mutex_, &ts);
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return (res == ETIMEDOUT) ? false : true;
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} else {
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pthread_cond_wait(&cond_, &cs->mutex_);
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return true;
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}
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}
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void ConditionVariablePosix::Wake() {
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pthread_cond_signal(&cond_);
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}
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void ConditionVariablePosix::WakeAll() {
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pthread_cond_broadcast(&cond_);
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}
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} // namespace webrtc
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