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 __MINGW_NOTHROW _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 __MINGW_NOTHROW 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