/* * RT-Linux semaphore implementation * * Written by Michael Barabanov <baraban@fsmlabs.com> * Copyright (C)  Finite State Machine Labs Inc. ,2000 * Released under the terms of the GPL Version 2 * */#ifndef __RTL_SEMA_H__#define __RTL_SEMA_H__#include <rtl_conf.h>#include <rtl_mutex.h>#include <errno.h>struct rtl_sem_struct{	int value;	spinlock_t lock;	rtl_wait_t wait;};typedef struct rtl_sem_struct sem_t;extern int sem_init(sem_t *sem, int pshared, unsigned int value);extern int sem_destroy(sem_t *sem);extern int sem_getvalue(sem_t *sem, int *sval);extern int sem_wait(sem_t *sem);extern int sem_trywait(sem_t *sem);extern int sem_post(sem_t *sem);#ifdef _RTL_POSIX_TIMEOUTSextern int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout);#endif#endif