/* Linuxthreads - a simple clone()-based implementation of Posix */ /* threads for Linux. */ /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ /* */ /* This program is free software; you can redistribute it and/or */ /* modify it under the terms of the GNU Library 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 Library General Public License for more details. */ #ifndef _SEMAPHORE_H #define _SEMAPHORE_H 1 #include <features.h> #include <sys/types.h> #include <limits.h> #define SEM_VALUE_MAX INT_MAX typedef struct { struct { long status; int spinlock; } sem_lock; int sem_value; _pthread_descr sem_waiting; } sem_t; __BEGIN_DECLS extern int sem_init __P((sem_t *__sem, int __pshared, unsigned int __value)); extern int sem_destroy __P((sem_t *__sem)); extern int sem_wait __P((sem_t *__sem)); extern int sem_trywait __P((sem_t *__sem)); extern int sem_post __P((sem_t *__sem)); extern int sem_getvalue __P((sem_t *__sem, int *__sval)); __END_DECLS #endif /* semaphore.h */