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Jonathan Schleifer 2014-05-14 23:20:55 +02:00
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/*
* Copyright (c) 2014, Jonathan Schleifer <js@webkeks.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
*/
#ifndef __TRYCATCH_H__
#define __TRYCATCH_H__
#include <setjmp.h>
#include <stdnoreturn.h>
#define TRYCATCH_CONCAT2(a, b) a ## b
#define TRYCATCH_CONCAT(a, b) TRYCATCH_CONCAT2(a, b)
#ifndef TRYCATCH_NORETURN
# define TRYCATCH_NORETURN
#endif
#define try \
struct trycatch_frame *TRYCATCH_CONCAT(trycatch_frame, __LINE__); \
jmp_buf TRYCATCH_CONCAT(trycatch_jmpbuf, __LINE__); \
TRYCATCH_CONCAT(trycatch_frame, __LINE__) = trycatch_frame_push(); \
trycatch_ex = setjmp(TRYCATCH_CONCAT(trycatch_jmpbuf, __LINE__)); \
if (trycatch_ex == 0) \
TRYCATCH_CONCAT(trycatch_frame, __LINE__)->jmpbuf = \
&TRYCATCH_CONCAT(trycatch_jmpbuf, __LINE__); \
if (trycatch_ex == 0)
#define catch(ex) \
trycatch_frame_pop(); \
for (int ex = trycatch_ex; trycatch_ex != 0; trycatch_ex = 0)
#define throw(ex) trycatch_throw(ex)
#define rethrow trycatch_throw(trycatch_ex)
struct trycatch_frame {
jmp_buf *jmpbuf;
struct trycatch_frame *prev;
};
static int trycatch_ex;
struct trycatch_frame *trycatch_frame_push(void);
void trycatch_frame_pop(void);
void TRYCATCH_NORETURN trycatch_throw(int ex);
#endif