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/**************************************************************************
Lightspark, a free flash player implementation
Copyright (C) 2009,2010 Alessandro Pignotti (a.pignotti@sssup.it)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
**************************************************************************/
#include <assert.h>
#include "threading.h"
#include "exceptions.h"
#include "logger.h"
using namespace lightspark;
//NOTE: thread jobs can be run only once
IThreadJob::IThreadJob():executing(false),aborting(false)
{
sem_init(&terminated, 0, 0);
}
IThreadJob::~IThreadJob()
{
sem_wait(&terminated);
sem_destroy(&terminated);
}
void IThreadJob::run()
{
try
{
assert(thisJob);
execute();
}
catch(JobTerminationException& ex)
{
LOG(LOG_NOT_IMPLEMENTED,"Job terminated");
}
sem_post(&terminated);
}
void IThreadJob::stop()
{
if(executing)
{
aborting=true;
this->abort();
}
}
Mutex::Mutex(const char* n):name(n),foundBusy(0)
{
sem_init(&sem,0,1);
}
Mutex::~Mutex()
{
if(name)
LOG(LOG_NO_INFO,"Mutex " << name << " waited " << foundBusy << " times");
sem_destroy(&sem);
}
void Mutex::lock()
{
if(name)
{
//If the semaphore can be acquired immediately just return
if(sem_trywait(&sem)==0)
return;
//Otherwise log the busy event and do a real wait
foundBusy++;
}
sem_wait(&sem);
}
void Mutex::unlock()
{
sem_post(&sem);
}
Condition::Condition(uint32_t init)//:blocked(0),maxBlocked(max)
{
sem_init(&sem,0,init);
}
Condition::~Condition()
{
//On destrucion unblocks the blocked thread
signal();
}
void Condition::wait()
{
sem_wait(&sem);
}
bool Condition::try_wait()
{
return sem_trywait(&sem)==0;
}
void Condition::signal()
{
sem_post(&sem);
}
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