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/* -*- 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 <sal/config.h>
#include <assert.h>
#include "system.hxx"
#include "unixerrnostring.hxx"
#include <sal/log.hxx>
#include <sal/types.h>
#include <osl/conditn.h>
#include <osl/time.h>
namespace {
struct oslConditionImpl
{
pthread_cond_t m_Condition;
pthread_mutex_t m_Lock;
bool m_State;
};
}
oslCondition SAL_CALL osl_createCondition()
{
oslConditionImpl* pCond;
int nRet=0;
pCond = static_cast<oslConditionImpl*>(malloc(sizeof(oslConditionImpl)));
if ( pCond == nullptr )
{
return nullptr;
}
pCond->m_State = false;
/* init condition variable with default attr. (PTHREAD_PROCESS_PRIVAT) */
nRet = pthread_cond_init(&pCond->m_Condition, PTHREAD_CONDATTR_DEFAULT);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "pthread_cond_init failed: " << UnixErrnoString(nRet) );
free(pCond);
return nullptr;
}
nRet = pthread_mutex_init(&pCond->m_Lock, PTHREAD_MUTEXATTR_DEFAULT);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "pthread_mutex_init failed: " << UnixErrnoString(nRet) );
nRet = pthread_cond_destroy(&pCond->m_Condition);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "pthread_cond_destroy failed: " << UnixErrnoString(nRet) );
free(pCond);
pCond = nullptr;
}
SAL_INFO( "sal.osl.condition", "osl_createCondition(): " << pCond );
return static_cast<oslCondition>(pCond);
}
void SAL_CALL osl_destroyCondition(oslCondition Condition)
{
oslConditionImpl* pCond;
pCond = static_cast<oslConditionImpl*>(Condition);
SAL_INFO( "sal.osl.condition", "osl_destroyCondition(" << pCond << ")" );
if ( pCond )
{
int nRet = pthread_cond_destroy(&pCond->m_Condition);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "pthread_cond_destroy failed: " << UnixErrnoString(nRet) );
nRet = pthread_mutex_destroy(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "pthread_mutex_destroy failed: " << UnixErrnoString(nRet) );
free(Condition);
}
}
sal_Bool SAL_CALL osl_setCondition(oslCondition Condition)
{
oslConditionImpl* pCond;
int nRet=0;
assert(Condition);
pCond = static_cast<oslConditionImpl*>(Condition);
nRet = pthread_mutex_lock(&pCond->m_Lock);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_setCondition(" << pCond << "): pthread_mutex_lock failed: " << UnixErrnoString(nRet) );
return false;
}
pCond->m_State = true;
nRet = pthread_cond_broadcast(&pCond->m_Condition);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_setCondition(" << pCond << "): pthread_cond_broadcast failed: " << UnixErrnoString(nRet) );
// try to unlock the mutex
pthread_mutex_unlock(&pCond->m_Lock);
return false;
}
nRet = pthread_mutex_unlock(&pCond->m_Lock);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_setCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
return false;
}
SAL_INFO( "sal.osl.condition", "osl_setCondition(" << pCond << ")" );
return true;
}
sal_Bool SAL_CALL osl_resetCondition(oslCondition Condition)
{
oslConditionImpl* pCond;
int nRet=0;
assert(Condition);
pCond = static_cast<oslConditionImpl*>(Condition);
nRet = pthread_mutex_lock(&pCond->m_Lock);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_resetCondition(" << pCond << "): pthread_mutex_lock failed: " << UnixErrnoString(nRet) );
return false;
}
pCond->m_State = false;
nRet = pthread_mutex_unlock(&pCond->m_Lock);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_resetCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
return false;
}
SAL_INFO( "sal.osl.condition", "osl_resetCondition(" << pCond << ")" );
return true;
}
oslConditionResult SAL_CALL osl_waitCondition(oslCondition Condition, const TimeValue* pTimeout)
{
oslConditionImpl* pCond;
int nRet=0;
assert(Condition);
pCond = static_cast<oslConditionImpl*>(Condition);
SAL_INFO( "sal.osl.condition", "osl_waitCondition(" << pCond << ")" );
nRet = pthread_mutex_lock(&pCond->m_Lock);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_waitCondition(" << pCond << "): pthread_mutex_lock failed: " << UnixErrnoString(nRet) );
return osl_cond_result_error;
}
if ( pTimeout )
{
if ( ! pCond->m_State )
{
struct timeval tp;
struct timespec to;
gettimeofday(&tp, nullptr);
SET_TIMESPEC( to, tp.tv_sec + pTimeout->Seconds,
tp.tv_usec * 1000 + pTimeout->Nanosec );
/* spurious wake up prevention */
do
{
const int ret = pthread_cond_timedwait(&pCond->m_Condition, &pCond->m_Lock, &to);
if ( ret != 0 )
{
if ( ret == ETIME || ret == ETIMEDOUT )
{
nRet = pthread_mutex_unlock(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "osl_waitCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
return osl_cond_result_timeout;
}
if ( ret != EINTR )
{
nRet = pthread_mutex_unlock(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "osl_waitCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
return osl_cond_result_error;
}
}
}
while ( !pCond->m_State );
}
}
else
{
while ( !pCond->m_State )
{
nRet = pthread_cond_wait(&pCond->m_Condition, &pCond->m_Lock);
if ( nRet != 0 )
{
SAL_WARN( "sal.osl.condition", "osl_waitCondition(" << pCond << "): pthread_cond_wait failed: " << UnixErrnoString(nRet) );
nRet = pthread_mutex_unlock(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "osl_waitCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
return osl_cond_result_error;
}
}
}
nRet = pthread_mutex_unlock(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "osl_waitCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
SAL_INFO( "sal.osl.condition", "osl_waitCondition(" << pCond << "): OK" );
return osl_cond_result_ok;
}
sal_Bool SAL_CALL osl_checkCondition(oslCondition Condition)
{
bool State;
oslConditionImpl* pCond;
int nRet=0;
assert(Condition);
pCond = static_cast<oslConditionImpl*>(Condition);
nRet = pthread_mutex_lock(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "osl_checkCondition(" << pCond << "): pthread_mutex_lock failed: " << UnixErrnoString(nRet) );
State = pCond->m_State;
nRet = pthread_mutex_unlock(&pCond->m_Lock);
SAL_WARN_IF( nRet != 0, "sal.osl.condition", "osl_checkCondition(" << pCond << "): pthread_mutex_unlock failed: " << UnixErrnoString(nRet) );
SAL_INFO( "sal.osl.condition", "osl_checkCondition(" << pCond << "): " << (State ? "YES" : "NO") );
return State;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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