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847 giacomo 1 
#ifndef _I386_SEMAPHORE_H
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#define _I386_SEMAPHORE_H
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#include <linux/linkage.h>
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#ifdef __KERNEL__
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#include <asm/system.h>
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#include <asm/atomic.h>
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#include <linux/wait.h>
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#include <linux/rwsem.h>
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typedef int sem_t;  /* sem.h */
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int sem_wait(sem_t *sem);
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int sem_init(sem_t *sem, int pshared, unsigned int value);
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int sem_post(sem_t *sem);
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int sem_trywait(sem_t *s);
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struct semaphore {
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        int init;
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        int start_value;
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        sem_t shark_sem;
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};
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#define DECLARE_MUTEX(name) struct semaphore name = { .init=0, .start_value=1}
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#define DECLARE_MUTEX_LOCKED(name) struct semaphore name= { .init=0, .start_value=0}
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static inline void down(struct semaphore * sem)
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{
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/*        if (sem->init == 0)
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        {
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                sem_init(&sem->shark_sem, 0, sem->start_value);
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                sem->init = 1;
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        }
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        sem_wait(&sem->shark_sem);
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*/
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}
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static inline void up(struct semaphore * sem)
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{
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/*
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        sem_post(&sem->shark_sem);
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*/
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}
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static inline void init_MUTEX (struct semaphore *sem)
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{
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/*
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        sem_init(&sem->shark_sem, 0, 1);
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*/
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}
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static inline void init_MUTEX_LOCKED (struct semaphore *sem)
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{      
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/*
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        sem_init(&sem->shark_sem, 0, 0);
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*/
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}
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static inline int down_trylock(struct semaphore * sem)
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{      
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        return 0;
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/*
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        return ( sem_trywait(&sem->shark_sem) );
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*/
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}
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#endif
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#endif