/*-------------------------------------------------------------------------
 *
 * exc.h--
 *	  POSTGRES exception handling definitions.
 *
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: exc.h,v 1.11 1998/01/24 22:50:41 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef EXC_H
#define EXC_H

#include <setjmp.h>

#include "config.h"

extern char *ExcFileName;
extern Index ExcLineNumber;

/*
 * ExcMessage and Exception are now defined in c.h
 */
#if defined(JMP_BUF)
typedef jmp_buf ExcContext;

#else
typedef sigjmp_buf ExcContext;

#endif

typedef Exception *ExcId;
typedef long ExcDetail;
typedef char *ExcData;

typedef struct ExcFrame
{
	struct ExcFrame *link;
	ExcContext	context;
	ExcId		id;
	ExcDetail	detail;
	ExcData		data;
	ExcMessage	message;
} ExcFrame;

extern ExcFrame *ExcCurFrameP;

#define ExcBegin()														\
		{																\
				ExcFrame		exception;								\
																		\
				exception.link = ExcCurFrameP;							\
				if (sigsetjmp(exception.context, 1) == 0) {				\
						ExcCurFrameP = &exception;						\
						{
#define ExcExcept()														\
						}												\
						ExcCurFrameP = exception.link;					\
				} else {												\
						{
#define ExcEnd()														\
						}												\
				}														\
		}

#define raise4(x, t, d, message) \
		ExcRaise(&(x), (ExcDetail)(t), (ExcData)(d), (ExcMessage)(message))

#define reraise() \
		raise4(*exception.id,exception.detail,exception.data,exception.message)

typedef void ExcProc (Exception *, ExcDetail, ExcData, ExcMessage);


/*
 * prototypes for functions in exc.c
 */
extern void EnableExceptionHandling(bool on);
extern void ExcRaise(Exception *excP,
		 ExcDetail detail,
		 ExcData data,
		 ExcMessage message);


/*
 * prototypes for functions in excabort.c
 */
extern void ExcAbort(const Exception *excP, ExcDetail detail, ExcData data,
		 ExcMessage message);

#endif							/* EXC_H */
