131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*
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* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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/**
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* \addtogroup pt
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* @{
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*/
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/**
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* \defgroup lc Local continuations
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* @{
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*
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* Local continuations form the basis for implementing protothreads. A
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* local continuation can be <i>set</i> in a specific function to
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* capture the state of the function. After a local continuation has
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* been set can be <i>resumed</i> in order to restore the state of the
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* function at the point where the local continuation was set.
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*
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*
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*/
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/**
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* \file core/sys/lc.h
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* Local continuations
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* \author
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* Adam Dunkels <adam@sics.se>
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*
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*/
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#ifdef DOXYGEN
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/**
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* Initialize a local continuation.
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*
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* This operation initializes the local continuation, thereby
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* unsetting any previously set continuation state.
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*
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* \hideinitializer
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*/
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#define LC_INIT(lc)
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/**
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* Set a local continuation.
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*
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* The set operation saves the state of the function at the point
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* where the operation is executed. As far as the set operation is
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* concerned, the state of the function does <b>not</b> include the
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* call-stack or local (automatic) variables, but only the program
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* counter and such CPU registers that needs to be saved.
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*
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* \hideinitializer
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*/
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#define LC_SET(lc)
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/**
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* Resume a local continuation.
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*
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* The resume operation resumes a previously set local continuation, thus
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* restoring the state in which the function was when the local
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* continuation was set. If the local continuation has not been
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* previously set, the resume operation does nothing.
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*
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* \hideinitializer
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*/
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#define LC_RESUME(lc)
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/**
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* Mark the end of local continuation usage.
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*
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* The end operation signifies that local continuations should not be
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* used any more in the function. This operation is not needed for
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* most implementations of local continuation, but is required by a
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* few implementations.
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*
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* \hideinitializer
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*/
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#define LC_END(lc)
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/**
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* \var typedef lc_t;
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*
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* The local continuation type.
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*
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* \hideinitializer
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*/
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#endif /* DOXYGEN */
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#ifndef LC_H_
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#define LC_H_
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#ifdef LC_CONF_INCLUDE
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#include LC_CONF_INCLUDE
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#else /* LC_CONF_INCLUDE */
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#include "sys/lc-switch.h"
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#endif /* LC_CONF_INCLUDE */
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#endif /* LC_H_ */
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/** @} */
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/** @} */
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