win32/include/setjmp.h

   1 /*
   2  * setjmp.h
   3  *
   4  * Declarations supporting setjmp and longjump, a method for avoiding
   5  * the normal function call return sequence. (Bleah!)
   6  *
   7  * This file is part of the Mingw32 package.
   8  *
   9  * Contributors:
  10  *  Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
  11  *
  12  *  THIS SOFTWARE IS NOT COPYRIGHTED
  13  *
  14  *  This source code is offered for use in the public domain. You may
  15  *  use, modify or distribute it freely.
  16  *
  17  *  This code is distributed in the hope that it will be useful but
  18  *  WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
  19  *  DISCLAIMED. This includes but is not limited to warranties of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  21  *
  22  * $Revision: 1.2 $
  23  * $Author: bellard $
  24  * $Date: 2005/04/17 13:14:29 $
  25  *
  26  */
  27
  28 #ifndef _SETJMP_H_
  29 #define _SETJMP_H_
  30
  31 /* All the headers include this file. */
  32 #include <_mingw.h>
  33
  34 #ifndef RC_INVOKED
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 /*
  41  * The buffer used by setjmp to store the information used by longjmp
  42  * to perform it's evil goto-like work. The size of this buffer was
  43  * determined through experimentation; it's contents are a mystery.
  44  * NOTE: This was determined on an i386 (actually a Pentium). The
  45  *       contents could be different on an Alpha or something else.
  46  */
  47 #define _JBLEN 16
  48 #define _JBTYPE int
  49 typedef _JBTYPE jmp_buf[_JBLEN];
  50
  51 /*
  52  * The function provided by CRTDLL which appears to do the actual work
  53  * of setjmp.
  54  */
  55 int     _setjmp (jmp_buf);
  56
  57 #define setjmp(x)       _setjmp(x)
  58
  59 /*
  60  * Return to the last setjmp call and act as if setjmp had returned
  61  * nVal (which had better be non-zero!).
  62  */
  63 void    longjmp (jmp_buf, int);
  64
  65 #ifdef __cplusplus
  66 }
  67 #endif
  68
  69 #endif  /* Not RC_INVOKED */
  70
  71 #endif  /* Not _SETJMP_H_ */
  72