/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <salhelper/condition.hxx>
#include <osl/time.h>
#include <osl/mutex.hxx>

using namespace salhelper;


/******************************************************************
 *                                                                *
 *                     Condition                                  *
 *                                                                *
 ******************************************************************/

Condition::Condition(osl::Mutex& aMutex)
    : m_aMutex(aMutex),
      m_aCondition()
{
}


Condition::~Condition()
{
}


/******************************************************************
 *                                                                *
 *              ConditionModifier                                 *
 *                                                                *
 ******************************************************************/

ConditionModifier::ConditionModifier(Condition& aCond)
    : m_aCond(aCond)
{
    m_aCond.m_aMutex.acquire();
}


ConditionModifier::~ConditionModifier()
{
    if(m_aCond.applies())
        m_aCond.m_aCondition.set();

    m_aCond.m_aMutex.release();
}


/******************************************************************
 *                                                                *
 *              ConditionWaiter                                   *
 *                                                                *
 ******************************************************************/

ConditionWaiter::timedout::timedout() {}

ConditionWaiter::timedout::timedout(timedout const &) {}

ConditionWaiter::timedout::~timedout() {}

ConditionWaiter::timedout &
ConditionWaiter::timedout::operator =(timedout const &) { return *this; }

ConditionWaiter::ConditionWaiter(Condition& aCond)
    : m_aCond(aCond)
{
    while(true) {
        m_aCond.m_aCondition.wait();
        m_aCond.m_aMutex.acquire();

        if(m_aCond.applies())
            break;
        else {
            m_aCond.m_aCondition.reset();
            m_aCond.m_aMutex.release();
        }
    }
}


ConditionWaiter::ConditionWaiter(Condition& aCond,sal_uInt32 milliSec)
    : m_aCond(aCond)
{
    TimeValue aTime;
    aTime.Seconds = milliSec / 1000;
    aTime.Nanosec = 1000000 * ( milliSec % 1000 );

    while(true) {
        if( m_aCond.m_aCondition.wait(&aTime) ==
            osl::Condition::result_timeout )
            throw timedout();

        m_aCond.m_aMutex.acquire();

        if(m_aCond.applies())
            break;
        else {
            m_aCond.m_aCondition.reset();
            m_aCond.m_aMutex.release();
        }
    }
}


ConditionWaiter::~ConditionWaiter()
{
    if(! m_aCond.applies())
        m_aCond.m_aCondition.reset();
    m_aCond.m_aMutex.release();
}

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