semaphore.h

Go to the documentation of this file.

 
#ifndef __SEMAPHORE_H__
#define __SEMAPHORE_H__
 
#include <sys/queue.h>
#include <sys/spinlock.h>
 
#define SEMAPHORE_NAMELEN   32
 
struct Thread;
 
typedef struct Semaphore
{
    Spinlock                                    lock;
    char                                        name[SEMAPHORE_NAMELEN];
    int                                         count;
    TAILQ_HEAD(SemaThreadQueue,Thread)          waiters;
    LIST_ENTRY(Semaphore)                       semaphoreList;
} Semaphore;
 
void Semaphore_Init(Semaphore *sema, int count, const char *name);
void Semaphore_Destroy(Semaphore *sema);
void Semaphore_Acquire(Semaphore *sema);
// bool TimedAcquire(Semaphore *sema, uint64_t timeout);
void Semaphore_Release(Semaphore *sema);
bool Semaphore_TryAcquire(Semaphore *sema);
 
#endif /* __SEMAPHORE_H__ */