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Mark Qvist 2014-04-03 22:21:37 +02:00
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/**
* \file
* <!--
* This file is part of BeRTOS.
*
* Bertos is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As a special exception, you may use this file as part of a free software
* library without restriction. Specifically, if other files instantiate
* templates or use macros or inline functions from this file, or you compile
* this file and link it with other files to produce an executable, this
* file does not by itself cause the resulting executable to be covered by
* the GNU General Public License. This exception does not however
* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
* Copyright 2001,2004,2005,2006,2007 Develer S.r.l. (http://www.develer.com/)
* Copyright 1999,2000,2001 Bernie Innocenti <bernie@codewiz.org>
*
* -->
*
* \defgroup kern_sem Mutually exclusive semaphores
* \ingroup kern
* \{
* \brief Mutually exclusive semaphores.
* Shared locking not supported in this implementation.
*
*
* \author Bernie Innocenti <bernie@codewiz.org>
*
* $WIZ$ module_name = "semaphores"
* $WIZ$ module_depends = "kernel"
* $WIZ$ module_configuration = "bertos/cfg/cfg_sem.h"
*/
#ifndef KERN_SEM_H
#define KERN_SEM_H
#include <cfg/compiler.h>
#include <struct/list.h>
/* Fwd decl */
struct Process;
typedef struct Semaphore
{
struct Process *owner;
List wait_queue;
int nest_count;
} Semaphore;
/**
* \name Process synchronization services
* \{
*/
void sem_init(struct Semaphore *s);
bool sem_attempt(struct Semaphore *s);
void sem_obtain(struct Semaphore *s);
void sem_release(struct Semaphore *s);
/* \} */
/* \} */ //defgroup kern_sem
int sem_testRun(void);
int sem_testSetup(void);
int sem_testTearDown(void);
#endif /* KERN_SEM_H */