51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
|
|
|
|
This file is part of Sortix libpthread.
|
|
|
|
Sortix libpthread is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by the
|
|
Free Software Foundation, either version 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
Sortix libpthread 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 Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with Sortix libpthread. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
pthread_cond_wait.c++
|
|
Waits on a condition.
|
|
|
|
*******************************************************************************/
|
|
|
|
#include <pthread.h>
|
|
#include <sched.h>
|
|
#include <time.h>
|
|
#include <timespec.h>
|
|
#include <unistd.h>
|
|
|
|
extern "C"
|
|
int pthread_cond_wait(pthread_cond_t* restrict cond,
|
|
pthread_mutex_t* restrict mutex)
|
|
{
|
|
struct pthread_cond_elem elem;
|
|
elem.next = NULL;
|
|
elem.woken = 0;
|
|
if ( cond->last )
|
|
cond->last->next = &elem;
|
|
if ( !cond->last )
|
|
cond->first = &elem;
|
|
cond->last = &elem;
|
|
while ( !elem.woken )
|
|
{
|
|
pthread_mutex_unlock(mutex);
|
|
sched_yield();
|
|
pthread_mutex_lock(mutex);
|
|
}
|
|
return 0;
|
|
}
|