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134 lines
3.8 KiB
C
134 lines
3.8 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT NOTICE
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//
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// The following open source license statement does not apply to any
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// entity in the Exception List published by FMSoft.
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//
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// For more information, please visit:
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//
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// https://www.fmsoft.cn/exception-list
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//
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//////////////////////////////////////////////////////////////////////////////
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/**
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* \file ucos2_semaphore.h
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* \author Wei Yongming <vincent@minigui.org>
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* \date 2004/02/03
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*
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* \brief 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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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) 2002~2020, 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/blog/minigui-licensing-policy/>.
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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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#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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