124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2006 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Debug macros for inter-module dependency checking.
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*
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* These macros expand to nothing in release builds. In debug
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* builds, they perform run-time dependency checks for modules.
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*
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* The usage pattern looks like this:
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*
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* \code
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* MOD_DEFINE(phaser)
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*
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* void phaser_init(void)
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* {
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* MOD_CHECK(computer);
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* MOD_CHECK(warp_core);
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*
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* [...charge weapons...]
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*
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* MOD_INIT(phaser);
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* }
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*
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* void phaser_cleanup(void)
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* {
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* MOD_CLEANUP(phaser);
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*
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* [...disarm phaser...]
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* }
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* \endcode
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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*/
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#ifndef CFG_MODULE_H
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#define CFG_MODULE_H
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#include <cfg/debug.h>
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/**
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* Declare a global variable for module dependency check.
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*
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* \see MOD_INIT(), MOD_CHECK()
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*/
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#define MOD_DEFINE(module) DB(extern bool module ## _initialized; bool module ## _initialized;)
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/**
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* Check that \a module was already initialized.
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*
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* Put this check just before accessing any facility
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* provided by a module that requires prior initialization.
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*
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* \see MOD_INIT()
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*/
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#define MOD_CHECK(module) \
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do { \
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DB(extern bool module ## _initialized;) \
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ASSERT(module ## _initialized); \
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} while (0)
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/**
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* Mark module as initialized.
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*
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* Marking initialization requires the global data
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* previously defined by MOD_DEFINE().
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*
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* To prevent double initialization bugs, an initialized
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* module must first be cleaned up with MOD_CLEANUP() before
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* calling MOD_INIT() another time.
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*
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* \see MOD_CLEANUP(), MOD_CHECK(), MOD_DEFINE()
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*/
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#define MOD_INIT(module) \
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do { \
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ASSERT(!module ## _initialized); \
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DB(module ## _initialized = true;) \
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} while (0)
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/**
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* Mark module as being no longer initialized.
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*
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* Marking initialization requires the global data
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* previously defined by MOD_DEFINE().
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*
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* \see MOD_INIT(), MOD_CHECK(), MOD_DEFINE()
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*/
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#define MOD_CLEANUP(module) \
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do { \
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ASSERT(module ## _initialized); \
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DB(module ## _initialized = false;) \
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} while (0)
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#endif /* CFG_MODULE_H */
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