X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=mware%2Fexcept.h;h=c600828dcad460754995aa90e560f917f8e3d964;hb=HEAD;hp=e729fd15b492c715f345eedd2930418873fc446c;hpb=77c1d6ba65a199f60faa0e0a68e63ef0eb87677c;p=bertos.git

diff --git a/mware/except.h b/mware/except.h
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-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction.  Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License.  This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2006 Develer S.r.l. (http://www.develer.com/)
- * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
- * This file is part of DevLib - See README.devlib for information.
- * -->
- *
- * \brief C++-like structured exception handling for C programs
- *
- * \version $Id$
- * \author Bernardo Innocenti <bernie@develer.com>
- */
-#ifndef MWARE_EXCEPT_H
-#define MWARE_EXCEPT_H
-
-#include <cfg/debug.h>
-
-#include <setjmp.h>
-
-#define EXCEPT_CONTEXTS 8
-
-/**
- * A stack of jump buffers used to record try sites
- * so they can be reached from throw sites.
- *
- * The stack contains return points for each nested
- * context. jmp_buf's are pushed into the stack at
- * try points and popped out when the try block ends
- * normally or when an exception is thrown.
- */
-extern jmp_buf except_stack[EXCEPT_CONTEXTS];
-extern int except_top;
-
-#define PUSH_EXCEPT	(ASSERT(except_top < EXCEPT_CONTEXTS), setjmp(except_stack[except_top++]))
-#define POP_EXCEPT	(ASSERT(except_top > 0), --except_top)
-#define DO_EXCEPT	(ASSERT(except_top > 0), longjmp(except_stack[--except_top], true))
-
-/**
- * Jump buffer to use when throwing an exception or aborting an operation
- *
- * User code can throw exceptions like this:
- *
- * \code
- *   void a_function_throwing_exceptions(void)
- *   {
- *       if (some_error_condition)
- *          THROW;
- *   }
- * \endcode
- *
- * Catching exceptions (brackets are optional):
- *
- * \code
- *    EXCEPT_DEFINE;
- *
- *    void a_function_catching_an_exception(void)
- *    {
- *        TRY
- *        {
- *            printf("Entered try block\n");
- *            a_function_throwing_exceptions();
- *            printf("Survived execution of critical code\n");
- *        }
- *        CATCH
- *        {
- *            printf("Exception caught!\n");
- *        }
- *        CATCH_END
- *    }
- * \endcode
- *
- * Simple syntax when you don't need to do anything when catching an excaption:
- *
- * \code
- *    TRY
- *        printf("Entered try block\n");
- *        a_function_throwing_exceptions();
- *        printf("Survived execution of critical code\n");
- *    TRY_END
- * \endcode
- *
- * You also need to declare the exception stack once in
- * your global declarations:
- * \code
- *    EXCEPT_DEFINE;
- * \endcode
- */
-#define TRY          if (PUSH_EXCEPT) { {
-#define TRY_END      } POP_EXCEPT; }
-#define CATCH        } POP_EXCEPT; } else {
-#define CATCH_END    }
-#define THROW        DO_EXCEPT
-
-
-#define EXCEPT_DEFINE \
-	jmp_buf except_stack[EXCEPT_CONTEXTS]; \
-	int except_top;
-
-#endif /* MWARE_EXCEPT_H */