mirror of https://github.com/rusefi/bldc.git
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
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/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2015 Black Sphere Technologies Ltd.
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* Written by Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This program 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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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/* Exception handling to escape deep nesting.
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* Used for the case of communicaiton failure and timeouts.
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*/
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/* Example usage:
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*
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* volatile struct exception e;
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* TRY_CATCH (e, EXCEPTION_TIMEOUT) {
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* ...
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* raise_exception(EXCEPTION_TIMEOUT, "Timeout occurred");
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* ...
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* }
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* if (e.type == EXCEPTION_TIMEOUT) {
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* printf("timeout: %s\n", e.msg);
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* }
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*/
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/* Limitations:
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* Can't use break, return, goto, etc from inside the TRY_CATCH block.
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*/
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#ifndef __EXCEPTION_H
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#define __EXCEPTION_H
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#include <setjmp.h>
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#include <stdint.h>
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#define EXCEPTION_ERROR 0x01
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#define EXCEPTION_TIMEOUT 0x02
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#define EXCEPTION_ALL -1
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struct exception {
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uint32_t type;
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const char *msg;
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/* private */
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uint32_t mask;
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jmp_buf jmpbuf;
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struct exception *outer;
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};
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extern struct exception *innermost_exception;
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#define TRY_CATCH(e, type_mask) \
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(e).type = 0; \
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(e).mask = (type_mask); \
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(e).outer = innermost_exception; \
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innermost_exception = (void*)&(e); \
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if (setjmp(innermost_exception->jmpbuf) == 0) \
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for (;innermost_exception == &(e); innermost_exception = (e).outer)
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void raise_exception(uint32_t type, const char *msg);
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#endif
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