//my_pxsem_fifo/semaphore.h
	/*   */
typedef struct {
  int	sem_fd[2];	/*   fd: [0]  , [1]   */
  int	sem_magic;	/*   */
} mysem_t;

#define	SEM_MAGIC	0x89674523

#ifdef	SEM_FAILED
#undef	SEM_FAILED
#define	SEM_FAILED	((mysem_t *)(-1))	/*     */
#endif
