#ifndef __ALT_SEM_H__
#define __ALT_SEM_H__
/******************************************************************************
* *
* License Agreement *
* *
* Copyright (c) 2004 Altera Corporation, San Jose, California, USA. *
* All rights reserved. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
* DEALINGS IN THE SOFTWARE. *
* *
* This agreement shall be governed in all respects by the laws of the State *
* of California and by the laws of the United States of America. *
* *
* Altera does not recommend, suggest or require that this reference design *
* file be used in conjunction or combination with any other product. *
******************************************************************************/
/******************************************************************************
* *
* THIS IS A LIBRARY READ-ONLY SOURCE FILE. DO NOT EDIT. *
* *
******************************************************************************/
/*
* This header provides macro definitions that can be used to create and use
* semaphores. These macros can be used in both a uC/OS-II based environment,
* and a single threaded HAL based environment.
*
* The motivation for these macros is to allow code to be developed which is
* thread safe under uC/OS-II, but incurs no additional overhead when used in a
* single threaded HAL environment.
*
* In the case of a single threaded HAL environment, they compile to
* "do nothing" directives, which ensures they do not contribute to the final
* executable.
*
* The following macros are available:
*
* ALT_SEM - Create a semaphore instance.
* ALT_EXTERN_SEM - Create a reference to an external semaphore instance.
* ALT_STATIC_SEM - Create a static semaphore instance.
* ALT_SEM_CREATE - Initialise a semaphore.
* ALT_SEM_PEND - Pend on a semaphore.
* ALT_SEM_POST - Increment a semaphore.
*
* Input arguments and return codes are all consistant with the equivalent
* uC/OS-II function.
*
* It's important to be careful in the use of the macros: ALT_SEM,
* ALT_EXTERN_SEM, and ALT_STATIC_SEM. In these three cases the semi-colon is
* included in the macro definition; so, for example, you should use:
*
* ALT_SEM(mysem)
*
* not:
*
* ALT_SEM(mysem);
*
* The inclusion of the semi-colon has been necessary to ensure the macros can
* compile with no warnings when used in a single threaded HAL environment.
*
*/
#include "priv/alt_no_error.h"
#define ALT_SEM(sem)
#define ALT_EXTERN_SEM(sem)
#define ALT_STATIC_SEM(sem)
#define ALT_SEM_CREATE(sem, value) alt_no_error ()
#define ALT_SEM_PEND(sem, timeout) alt_no_error ()
#define ALT_SEM_POST(sem) alt_no_error ()
#ifndef ALT_SINGLE_THREADED
#define ALT_SINGLE_THREADED
#endif
#endif /* __ALT_SEM_H__ */
