granicus.if.org Git - postgresql/blob - src/include/utils/exc.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * exc.h--
   4  *        POSTGRES exception handling definitions.
   5  *
   6  *
   7  * Copyright (c) 1994, Regents of the University of California
   8  *
   9  * $Id: exc.h,v 1.8 1997/09/07 05:02:28 momjian Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef EXC_H
  14 #define EXC_H
  15
  16 #include <setjmp.h>
  17
  18 #include "config.h"
  19
  20 extern char    *ExcFileName;
  21 extern Index    ExcLineNumber;
  22
  23 /*
  24  * ExcMessage and Exception are now defined in c.h
  25  */
  26 #if defined(JMP_BUF)
  27 typedef jmp_buf ExcContext;
  28
  29 #else
  30 typedef sigjmp_buf ExcContext;
  31
  32 #endif
  33
  34 typedef Exception *ExcId;
  35 typedef long    ExcDetail;
  36 typedef char   *ExcData;
  37
  38 typedef struct ExcFrame
  39 {
  40         struct ExcFrame *link;
  41         ExcContext              context;
  42         ExcId                   id;
  43         ExcDetail               detail;
  44         ExcData                 data;
  45         ExcMessage              message;
  46 }                               ExcFrame;
  47
  48 extern ExcFrame *ExcCurFrameP;
  49
  50 #define ExcBegin()                                                                                                              \
  51                 {                                                                                                                               \
  52                                 ExcFrame                exception;                                                              \
  53                                                                                                                                                 \
  54                                 exception.link = ExcCurFrameP;                                                  \
  55                                 if (sigsetjmp(exception.context, 1) == 0) {                             \
  56                                                 ExcCurFrameP = &exception;                                              \
  57                                                 {
  58 #define ExcExcept()                                                                                                             \
  59                                                 }                                                                                               \
  60                                                 ExcCurFrameP = exception.link;                                  \
  61                                 } else {                                                                                                \
  62                                                 {
  63 #define ExcEnd()                                                                                                                \
  64                                                 }                                                                                               \
  65                                 }                                                                                                               \
  66                 }
  67
  68 #define raise4(x, t, d, message) \
  69                 ExcRaise(&(x), (ExcDetail)(t), (ExcData)(d), (ExcMessage)(message))
  70
  71 #define reraise() \
  72                 raise4(*exception.id,exception.detail,exception.data,exception.message)
  73
  74 typedef void    ExcProc(Exception *, ExcDetail, ExcData, ExcMessage);
  75
  76
  77 /*
  78  * prototypes for functions in exc.c
  79  */
  80 extern void             EnableExceptionHandling(bool on);
  81 extern void
  82 ExcRaise(Exception * excP,
  83                  ExcDetail detail,
  84                  ExcData data,
  85                  ExcMessage message);
  86
  87
  88 /*
  89  * prototypes for functions in excabort.c
  90  */
  91 extern void
  92 ExcAbort(const Exception * excP, ExcDetail detail, ExcData data,
  93                  ExcMessage message);
  94
  95 #endif                                                  /* EXC_H */