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//////////////////////////////////////////////////////////////////////////////
//Copyright 2008
// Andrew Gacek, Steven Holte, Gopalan Nadathur, Xiaochu Qi, Zach Snow
//////////////////////////////////////////////////////////////////////////////
// This file is part of Teyjus. //
// //
// Teyjus 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 3 of the License, or //
// (at your option) any later version. //
// //
// Teyjus 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 Teyjus. If not, see <http://www.gnu.org/licenses/>. //
//////////////////////////////////////////////////////////////////////////////
/****************************************************************************
* *
* File error.h -- error-handling functions *
* *
****************************************************************************/
#ifndef ERROR_H
#define ERROR_H
#include <stdlib.h>
#include <stdarg.h>
#include <setjmp.h>
#include "tjsignal.h"
#include "../simulator/mctypes.h" //to be modified
/****************************************************************************
* Exception stack declarations. *
****************************************************************************/
typedef enum EM_ExnType{
EM_NO_ERR = 0, // no errors
EM_NO_EXN, // used for warnings ??
EM_ABORT, // exit the executable immediately
EM_EXIT, // traverse the exception stack and exit
EM_TOP_LEVEL, // return to the toplevel
EM_QUERY, // abort solving the query
EM_QUERY_RESULT, // query is solved; print answer
EM_FAIL, // fail to simulator level
} EM_ExnType;
//function call environment stack
extern SIGNAL_jmp_buf *EM_ExnHandlerStack;
extern int EM_ExnHandlerStackTop;
extern int EM_ExnHandlerStackSize;
//exception type
extern EM_ExnType EM_CurrentExnType;
/****************************************************************************
* Exception-handling macros *
****************************************************************************/
//try
#define EM_TRY \
if (EM_ExnHandlerStackTop >= EM_ExnHandlerStackSize) \
{ \
EM_ExnHandlerStackSize = \
(EM_ExnHandlerStackSize + 1) * 2; \
EM_ExnHandlerStack = \
(SIGNAL_jmp_buf *)EM_realloc((void *)EM_ExnHandlerStack, \
EM_ExnHandlerStackSize * sizeof(SIGNAL_jmp_buf)); \
} \
if (SIGNAL_setjmp(EM_ExnHandlerStack[EM_ExnHandlerStackTop++]) == 0) \
{
//catch
#define EM_CATCH \
EM_ExnHandlerStackTop--; \
} \
else
//throw
/* Jump to the nearest (in a dynamic sense) EM_Try block, setting
EM_CurrentExnType to TYPE. Given a constant, the conditional in
this macro will be optimized away.
TODO: added cast to EM_CurrentExnType. */
#define EM_THROW(type) EM_THROWVAL((type), 1)
#define EM_THROWVAL(type, val) \
do { \
if ((type) == EM_ABORT) \
exit(1); \
else \
{ \
EM_CurrentExnType = (EM_ExnType)(type); \
SIGNAL_longjmp(EM_ExnHandlerStack[--EM_ExnHandlerStackTop], val); \
} \
} while(0)
//rethrow
/* pass the current exception to the next handler. Use only within an
EM_Catch block. */
#define EM_RETHROW() \
SIGNAL_longjmp(EM_ExnHandlerStack[--EM_ExnHandlerStackTop], 1)
/* Here's an example use of the above macros:
...
EM_TRY
{
foo();
if (foobar)
EM_THROW(EM_FOOBAR);
}
EM_CATCH
{
un_foo(); // clean up
if (EM_CurrentExnType == EM_FOOBAR)
printf("foobar!"); // stop the error here
else
EM_RETHROW(); // let a later handler handle it
}
*/
/****************************************************************************
* Routines which will generate errors automatically. *
****************************************************************************/
void *EM_malloc(unsigned int);
void *EM_realloc(void *, unsigned int);
char *EM_strdup(char *);
/****************************************************************************
* Beginning error indices for different modules (by module abbreviation) *
****************************************************************************/
/* general errors */
#define EM_NO_ERROR 0
#define EM_FIRST_ERR_INDEX 1
#define LINKER_FIRST_ERR_INDEX 50
#define LOADER_FIRST_ERR_INDEX 100
#define STREAM_FIRST_ERR_INDEX 150
#define SIM_FIRST_ERR_INDEX 200
#define BI_FIRST_ERR_INDEX 300
#define RT_FIRST_ERR_INDEX 400
#define FRONT_FIRST_ERR_INDEX 500
/****************************************************************************
* General-use error messages *
****************************************************************************/
enum
{
EM_OUT_OF_MEMORY = EM_FIRST_ERR_INDEX,
EM_OUT_OF_HEAP,
EM_NEWLINE,
EM_ERROR_COLON,
EM_WARNING_COLON
};
/****************************************************************************
* The routine that gets called in the event of an error *
****************************************************************************/
void EM_error(int inIndex, ...);
/****************************************************************************
* Have there been any errors since last EM_Reset()? *
****************************************************************************/
extern Boolean EM_anyErrors;
void EM_reset();
#endif //ERROR_H
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