99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
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/*
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* \file psos_semaphore.h
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* \author Wei Yongming <vincent@minigui.org>
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* \date 2007/05/16
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*
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* \brief This is the POSIX semaphore implementation in order to
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run MiniGUI on pSOS.
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*
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\verbatim
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This header contains all the definitions needed to support
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POSIX semaphore under pSOS. 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 pSOS.
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This file is part of MiniGUI, a mature cross-platform windowing
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and Graphics User Interface (GUI) support system for embedded systems
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and smart IoT devices.
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Copyright (C) 2002~2018, Beijing FMSoft Technologies Co., Ltd.
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Copyright (C) 1998~2002, WEI Yongming
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Or,
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As this program is a library, any link to this program must follow
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GNU General Public License version 3 (GPLv3). If you cannot accept
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GPLv3, you need to be licensed from FMSoft.
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If you have got a commercial license of this program, please use it
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under the terms and conditions of the commercial license.
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For more information about the commercial license, please refer to
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<http://www.minigui.com/en/about/licensing-policy/>.
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\endverbatim
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*/
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/*
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* $Id: psos_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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#ifndef FM_PSOS_SEMAPHORE_H
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#define FM_PSOS_SEMAPHORE_H
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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 unsigned long 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 /* FM_PSOS_SEMAPHORE_H */
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/* End of psos_semaphore.h */
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