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tag: Version-3.5.3
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/*
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
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 2 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "SC_Sem.h"
SC_Semaphore::SC_Semaphore(int initialCount)
{
pthread_mutex_init (&mutex, NULL);
pthread_cond_init (&available, NULL);
count = initialCount;
}
SC_Semaphore::~SC_Semaphore()
{
pthread_mutex_destroy (&mutex);
pthread_cond_destroy (&available);
}
void SC_Semaphore::Acquire()
{
pthread_mutex_lock (&mutex);
while (count < 1) {
pthread_cond_wait (&available, &mutex);
}
count--;
pthread_mutex_unlock (&mutex);
}
void SC_Semaphore::Release()
{
pthread_mutex_lock (&mutex);
if (++count > 0) {
pthread_cond_signal (&available);
}
pthread_mutex_unlock (&mutex);
}
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