mingw/include/setjmp.h

   1 /*
   2  * setjmp.h
   3  * This file has no copyright assigned and is placed in the Public Domain.
   4  * This file is a part of the mingw-runtime package.
   5  * No warranty is given; refer to the file DISCLAIMER within the package.
   6  *
   7  * Declarations supporting setjmp and longjump, a method for avoiding
   8  * the normal function call return sequence. (Bleah!)
   9  *
  10  */
  11
  12 #ifndef _SETJMP_H_
  13 #define _SETJMP_H_
  14
  15 /* All the headers include this file. */
  16 #include <_mingw.h>
  17
  18 #ifndef RC_INVOKED
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 /*
  25  * The buffer used by setjmp to store the information used by longjmp
  26  * to perform it's evil goto-like work. The size of this buffer was
  27  * determined through experimentation; it's contents are a mystery.
  28  * NOTE: This was determined on an i386 (actually a Pentium). The
  29  *       contents could be different on an Alpha or something else.
  30  */
  31 #define _JBLEN 16
  32 #define _JBTYPE int
  33 typedef _JBTYPE jmp_buf[_JBLEN];
  34
  35 /*
  36  * The function provided by CRTDLL which appears to do the actual work
  37  * of setjmp.
  38  */
  39 _CRTIMP int __cdecl _setjmp (jmp_buf);
  40
  41 #define setjmp(x)       _setjmp(x)
  42
  43 /*
  44  * Return to the last setjmp call and act as if setjmp had returned
  45  * nVal (which had better be non-zero!).
  46  */
  47 _CRTIMP void __cdecl longjmp (jmp_buf, int) __MINGW_ATTRIB_NORETURN;
  48
  49 #ifdef __cplusplus
  50 }
  51 #endif
  52
  53 #endif  /* Not RC_INVOKED */
  54
  55 #endif  /* Not _SETJMP_H_ */
  56