semaphor.h

本程序为ST公司开发的源代码

/*
 * semaphor.h
 *
 * Copyright (C) STMicroelectronics Ltd. 1998
 *
 * Semaphore handling.
 */

#ifndef __os20_semaphor_h
#define __os20_semaphor_h

#include "task.h"   /* for task_t */
#include "ostime.h" /* for osclock_t */

struct semaphore_class_s;

typedef struct semaphore_s
{
  struct semaphore_class_s* semaphore_class;        /* class of semaphore */
  int                       semaphore_count;        /* value of semaphore */
  task_t*                   semaphore_front;        /* front of queue of */
  task_t*                   semaphore_back;         /* back of queue */
  /*task_t*                   semaphore_owner;*/        /* semaphore owner */
  struct semaphore_s*       semaphore_next;         /* next semaphore_t */
} semaphore_t;

void         semaphore_init_fifo (semaphore_t* semaphore, int count);
semaphore_t* semaphore_create_fifo (int count);
void         semaphore_init_priority (semaphore_t* semaphore, int count);
semaphore_t* semaphore_create_priority (int count);

void         semaphore_init_fifo_timeout (semaphore_t* semaphore, int count);
semaphore_t* semaphore_create_fifo_timeout (int count);
void         semaphore_init_priority_timeout (semaphore_t* semaphore, int count);
semaphore_t* semaphore_create_priority_timeout (int count);

void         semaphore_wait (semaphore_t* semaphore);
void         semaphore_signal (semaphore_t* semaphore);
void         semaphore_delete (semaphore_t* semaphore);

int          semaphore_wait_timeout (semaphore_t* semaphore, const osclock_t* timeout);

void         interrupt_semaphore_signal(semaphore_t *semphore);

#endif