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