/*
 * (C) Copyright 1996-2017 ECMWF.
 * 
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 * In applying this licence, ECMWF does not waive the privileges and immunities 
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */


#include "eckit/exception/Exceptions.h"
#include "eckit/thread/MutexCond.h"

//-----------------------------------------------------------------------------

namespace eckit {

//-----------------------------------------------------------------------------

MutexCond::MutexCond(char tag):
	tag_(tag)
{
	pthread_mutexattr_t attr;
	pthread_condattr_t  cattr;

    THRCALL(::pthread_mutexattr_init(&attr));
	THRCALL(::pthread_condattr_init(&cattr));

	THRCALL(::pthread_mutex_init(&mutex_,&attr));
	THRCALL(::pthread_cond_init(&cond_,&cattr));

	inited_ = true;

    THRCALL(::pthread_mutexattr_destroy(&attr));
	THRCALL(::pthread_condattr_destroy(&cattr));
}

MutexCond::~MutexCond()
{
	THRCALL(::pthread_mutex_destroy(&mutex_));

	pthread_cond_destroy(&cond_); // Don't use THRCALL as some thread may be waiting for that condition
	inited_ = false;
}

void MutexCond::lock()
{
	ASSERT(inited_);
	THRCALL(::pthread_mutex_lock(&mutex_));
}

void MutexCond::unlock()
{
	ASSERT(inited_);
	THRCALL(::pthread_mutex_unlock(&mutex_));
}

void MutexCond::wait()
{
	ASSERT(inited_);
//	AutoState x('.');
	THRCALL(::pthread_cond_wait(&cond_,&mutex_));
}

bool MutexCond::wait(int sec)
{
	ASSERT(inited_);
//	AutoState x(':');
	timespec timeout = { ::time(0) + sec ,0};
	int n = pthread_cond_timedwait(&cond_,&mutex_,&timeout);
	if(n && n != ETIMEDOUT) THRCALL(n);
	return n == ETIMEDOUT;
}

void MutexCond::signal()
{
	ASSERT(inited_);
	pthread_cond_signal(&cond_);
}

void MutexCond::broadcast()
{
	ASSERT(inited_);
	pthread_cond_broadcast(&cond_);
}

//-----------------------------------------------------------------------------

} // namespace eckit

