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87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
/*
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* \file vxworks_semaphore.h
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* \author Wei Yongming <ymwei@minigui.org>
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* \date 2005/01/11
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*
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* Description:
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*
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* This header contains all the definitions needed to support
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* POSIX semaphore under ThreadX. The reader is referred to the POSIX
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* standard or equivalent documentation for details of the
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* functionality contained herein.
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*
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\verbatim
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Copyright (C) 2005~2012 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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This header contains all the definitions needed to support
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POSIX semaphore under ThreadX. The reader is referred to the POSIX
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standard or equivalent documentation for details of the
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functionality contained herein.
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We do this work in order to run MiniGUI on ThreadX.
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\endverbatim
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*/
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/*
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* $Id: vxworks_semaphore.h 13674 2010-12-06 06:45:01Z wanzheng $
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*
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* This is the POSIX semaphore implementation in order to run MiniGUI on ThreadX.
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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) 2005-2012 FMSoft.
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*/
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#ifndef FMVX_SEMAPHORE_H
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#define FMVX_SEMAPHORE_H
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#ifdef _MGUSE_OWN_SEMAPHORE
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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typedef struct _sem_t
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{
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SEM_ID semid;
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unsigned int value;
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} sem_t;
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#define SEM_VALUE_MAX UINT_MAX
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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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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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#endif /* FMVX_SEMAPHORE_H */
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#endif
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/* End of pthread.h */
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