1
0
Fork 0
mirror of https://gitlab.com/sortix/sortix.git synced 2023-02-13 20:55:38 -05:00
sortix--sortix/libpthread/sem_getvalue.c++
Jonas 'Sortie' Termansen 392472af5c Add semaphores API.
2014-11-30 19:31:40 +01:00

31 lines
1.1 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 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/>.
sem_getvalue.c++
Get the value of a semaphore.
*******************************************************************************/
#include <semaphore.h>
extern "C" int sem_getvalue(sem_t* restrict sem, int* restrict value_ptr)
{
*value_ptr = __atomic_load_n(&sem->value, __ATOMIC_SEQ_CST);
return 0;
}