move protothread lib
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4 changed files with 1 additions and 1 deletions
76
projekte/protothreads/pt/lc-switch.h
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76
projekte/protothreads/pt/lc-switch.h
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/*
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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
|
||||
* 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
|
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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
|
||||
* 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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* $Id: lc-switch.h,v 1.4 2006/06/03 11:29:43 adam Exp $
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*/
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/**
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* \addtogroup lc
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* @{
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*/
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/**
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* \file
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* Implementation of local continuations based on switch() statment
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* \author Adam Dunkels <adam@sics.se>
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*
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* This implementation of local continuations uses the C switch()
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* statement to resume execution of a function somewhere inside the
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* function's body. The implementation is based on the fact that
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* switch() statements are able to jump directly into the bodies of
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* control structures such as if() or while() statmenets.
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*
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* This implementation borrows heavily from Simon Tatham's coroutines
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* implementation in C:
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* http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
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*/
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#ifndef __LC_SWITCH_H__
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#define __LC_SWITCH_H__
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/* WARNING! lc implementation using switch() does not work if an
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LC_SET() is done within another switch() statement! */
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/** \hideinitializer */
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typedef unsigned short lc_t;
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#define LC_INIT(s) s = 0;
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#define LC_RESUME(s) switch(s) { case 0:
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#define LC_SET(s) s = __LINE__; case __LINE__:
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#define LC_END(s) }
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#endif /* __LC_SWITCH_H__ */
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/** @} */
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132
projekte/protothreads/pt/lc.h
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132
projekte/protothreads/pt/lc.h
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@ -0,0 +1,132 @@
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/*
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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 protothreads library.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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* $Id: lc.h,v 1.2 2005/02/24 10:36:59 adam Exp $
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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 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_INCLUDE
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#include LC_INCLUDE
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#else
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#include "lc-switch.h"
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#endif /* LC_INCLUDE */
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#endif /* __LC_H__ */
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/** @} */
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/** @} */
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323
projekte/protothreads/pt/pt.h
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323
projekte/protothreads/pt/pt.h
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@ -0,0 +1,323 @@
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/*
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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
|
||||
* 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
|
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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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* $Id: pt.h,v 1.7 2006/10/02 07:52:56 adam Exp $
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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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* \file
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* Protothreads implementation.
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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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#ifndef __PT_H__
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#define __PT_H__
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#include "lc.h"
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struct pt {
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lc_t lc;
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};
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#define PT_WAITING 0
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#define PT_YIELDED 1
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#define PT_EXITED 2
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#define PT_ENDED 3
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/**
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* \name Initialization
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* @{
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*/
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/**
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* Initialize a protothread.
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*
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* Initializes a protothread. Initialization must be done prior to
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* starting to execute the protothread.
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*
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* \param pt A pointer to the protothread control structure.
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*
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* \sa PT_SPAWN()
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*
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* \hideinitializer
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*/
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#define PT_INIT(pt) LC_INIT((pt)->lc)
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/** @} */
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/**
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* \name Declaration and definition
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* @{
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*/
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/**
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* Declaration of a protothread.
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*
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* This macro is used to declare a protothread. All protothreads must
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* be declared with this macro.
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*
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* \param name_args The name and arguments of the C function
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* implementing the protothread.
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*
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* \hideinitializer
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*/
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#define PT_THREAD(name_args) char name_args
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/**
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* Declare the start of a protothread inside the C function
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* implementing the protothread.
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*
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* This macro is used to declare the starting point of a
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* protothread. It should be placed at the start of the function in
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* which the protothread runs. All C statements above the PT_BEGIN()
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* invokation will be executed each time the protothread is scheduled.
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*
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* \param pt A pointer to the protothread control structure.
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*
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* \hideinitializer
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*/
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#define PT_BEGIN(pt) { char PT_YIELD_FLAG = 1; LC_RESUME((pt)->lc)
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/**
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* Declare the end of a protothread.
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*
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* This macro is used for declaring that a protothread ends. It must
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* always be used together with a matching PT_BEGIN() macro.
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*
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* \param pt A pointer to the protothread control structure.
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*
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* \hideinitializer
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*/
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#define PT_END(pt) LC_END((pt)->lc); PT_YIELD_FLAG = 0; \
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PT_INIT(pt); return PT_ENDED; }
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/** @} */
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/**
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* \name Blocked wait
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* @{
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*/
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/**
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* Block and wait until condition is true.
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*
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* This macro blocks the protothread until the specified condition is
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* true.
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*
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* \param pt A pointer to the protothread control structure.
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* \param condition The condition.
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*
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* \hideinitializer
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*/
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#define PT_WAIT_UNTIL(pt, condition) \
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do { \
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LC_SET((pt)->lc); \
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if(!(condition)) { \
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return PT_WAITING; \
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} \
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} while(0)
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/**
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* Block and wait while condition is true.
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*
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* This function blocks and waits while condition is true. See
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* PT_WAIT_UNTIL().
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*
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* \param pt A pointer to the protothread control structure.
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* \param cond The condition.
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*
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* \hideinitializer
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*/
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#define PT_WAIT_WHILE(pt, cond) PT_WAIT_UNTIL((pt), !(cond))
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/** @} */
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/**
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* \name Hierarchical protothreads
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* @{
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*/
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/**
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* Block and wait until a child protothread completes.
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*
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* This macro schedules a child protothread. The current protothread
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* will block until the child protothread completes.
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*
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* \note The child protothread must be manually initialized with the
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* PT_INIT() function before this function is used.
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*
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* \param pt A pointer to the protothread control structure.
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* \param thread The child protothread with arguments
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*
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* \sa PT_SPAWN()
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*
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* \hideinitializer
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*/
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#define PT_WAIT_THREAD(pt, thread) PT_WAIT_WHILE((pt), PT_SCHEDULE(thread))
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/**
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* Spawn a child protothread and wait until it exits.
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*
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* This macro spawns a child protothread and waits until it exits. The
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* macro can only be used within a protothread.
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*
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* \param pt A pointer to the protothread control structure.
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* \param child A pointer to the child protothread's control structure.
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* \param thread The child protothread with arguments
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*
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* \hideinitializer
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*/
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#define PT_SPAWN(pt, child, thread) \
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do { \
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PT_INIT((child)); \
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PT_WAIT_THREAD((pt), (thread)); \
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} while(0)
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/** @} */
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/**
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* \name Exiting and restarting
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* @{
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*/
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/**
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* Restart the protothread.
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*
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* This macro will block and cause the running protothread to restart
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* its execution at the place of the PT_BEGIN() call.
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*
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* \param pt A pointer to the protothread control structure.
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*
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* \hideinitializer
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*/
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#define PT_RESTART(pt) \
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do { \
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PT_INIT(pt); \
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return PT_WAITING; \
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} while(0)
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/**
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* Exit the protothread.
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*
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* This macro causes the protothread to exit. If the protothread was
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* spawned by another protothread, the parent protothread will become
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* unblocked and can continue to run.
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*
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* \param pt A pointer to the protothread control structure.
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*
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* \hideinitializer
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*/
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#define PT_EXIT(pt) \
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do { \
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PT_INIT(pt); \
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return PT_EXITED; \
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} while(0)
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/** @} */
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/**
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* \name Calling a protothread
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* @{
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*/
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/**
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* Schedule a protothread.
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*
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* This function shedules a protothread. The return value of the
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* function is non-zero if the protothread is running or zero if the
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* protothread has exited.
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*
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* \param f The call to the C function implementing the protothread to
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* be scheduled
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*
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* \hideinitializer
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*/
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#define PT_SCHEDULE(f) ((f) < PT_EXITED)
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/** @} */
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/**
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* \name Yielding from a protothread
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* @{
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*/
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/**
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* Yield from the current protothread.
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*
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* This function will yield the protothread, thereby allowing other
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* processing to take place in the system.
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*
|
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* \param pt A pointer to the protothread control structure.
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*
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* \hideinitializer
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*/
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#define PT_YIELD(pt) \
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do { \
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PT_YIELD_FLAG = 0; \
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LC_SET((pt)->lc); \
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if(PT_YIELD_FLAG == 0) { \
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return PT_YIELDED; \
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||||
} \
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} while(0)
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/**
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* \brief Yield from the protothread until a condition occurs.
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* \param pt A pointer to the protothread control structure.
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* \param cond The condition.
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*
|
||||
* This function will yield the protothread, until the
|
||||
* specified condition evaluates to true.
|
||||
*
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_YIELD_UNTIL(pt, cond) \
|
||||
do { \
|
||||
PT_YIELD_FLAG = 0; \
|
||||
LC_SET((pt)->lc); \
|
||||
if((PT_YIELD_FLAG == 0) || !(cond)) { \
|
||||
return PT_YIELDED; \
|
||||
} \
|
||||
} while(0)
|
||||
|
||||
/** @} */
|
||||
|
||||
#endif /* __PT_H__ */
|
||||
|
||||
/** @} */
|
||||
Reference in a new issue