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