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