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99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/**
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* \file ucos2_semaphore.h
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* \author Wei Yongming <ymwei@minigui.org>
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* \date 2004/02/03
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*
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* semaphore.h: This header contains the POSIX semaphore definitions
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* needed to support MiniGUI under uC/OS-II.
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*
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\verbatim
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Copyright (C) 2004~2012 FMSoft.
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All rights reserved by FMSoft (http://www.fmsoft.cn).
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This file is part of MiniGUI, a compact cross-platform Graphics
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User Interface (GUI) support system for real-time embedded systems.
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\endverbatim
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*/
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/*
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* $Id: ucos2_semaphore.h 11349 2009-03-02 05:00:43Z weiym $
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*
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* MiniGUI for Linux/uClinux, eCos, uC/OS-II, VxWorks,
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* pSOS, ThreadX, NuCleus, OSE, and Win32.
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*
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* Copyright (C) 2004-2012 FMSoft.
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*/
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#ifndef UCOSII_SEMAPHORE_H
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#define UCOSII_SEMAPHORE_H
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#ifdef __UCOSII__
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#define sem_t ucos2_sem_t
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#define SEM_VALUE_MAX USHRT_MAX
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/*-----------------------------------------------------------------------------
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** Semaphore object definition
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*/
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typedef struct
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{
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void* os_sema;
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} sem_t;
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/*-----------------------------------------------------------------------------
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** Semaphore functions
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*/
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/* Initialize semaphore to value. */
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/* pshared is not supported under uC/OS-II. */
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int sem_init (sem_t *sem, int pshared, unsigned int value);
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/* Destroy the semaphore. */
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int sem_destroy (sem_t *sem);
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/* Decrement value if >0 or wait for a post. */
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int sem_wait (sem_t *sem);
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/* Decrement value if >0, return -1 if not. */
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int sem_trywait (sem_t *sem);
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/* Increment value and wake a waiter if one is present. */
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int sem_post (sem_t *sem);
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/* Get current value */
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int sem_getvalue (sem_t *sem, int *sval);
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/* We do not implement the named semaphore functions */
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#if 0
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/*-----------------------------------------------------------------------------
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** Named semaphore functions
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*/
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/* Open an existing named semaphore, or create it. */
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sem_t *sem_open (const char *name, int oflag, ...);
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/* Close descriptor for semaphore. */
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int sem_close (sem_t *sem);
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/* Remove named semaphore */
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int sem_unlink (const char *name);
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/*-----------------------------------------------------------------------------
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** Special return value for sem_open()
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*/
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#define SEM_FAILED ((sem_t *)NULL)
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/* We do not implement the named semaphore functions */
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#endif
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#endif /* __UCOSII__ */
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#endif /* UCOSII_SEMAPHORE_H */
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