signal.h

C标准库源代码,能提高对C的理解,不错的哦

/***
*signal.h - defines signal values and routines
*
*       Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This file defines the signal values and declares the signal functions.
*       [ANSI/System V]
*
*       [Public]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif  /* _MSC_VER > 1000 */

#ifndef _INC_SIGNAL
#define _INC_SIGNAL

#if !defined (_WIN32) && !defined (_MAC)
#error ERROR: Only Mac or Win32 targets supported!
#endif  /* !defined (_WIN32) && !defined (_MAC) */

#ifndef _CRTBLD
/* This version of the header files is NOT for user programs.
 * It is intended for use when building the C runtimes ONLY.
 * The version intended for public use will not have this message.
 */
#error ERROR: Use of C runtime library internal header file.
#endif  /* _CRTBLD */

#ifdef __cplusplus
extern "C" {
#endif  /* __cplusplus */

#ifndef _INTERNAL_IFSTRIP_
#include <cruntime.h>
#endif  /* _INTERNAL_IFSTRIP_ */


/* Define _CRTIMP */

#ifndef _CRTIMP
#ifdef CRTDLL
#define _CRTIMP __declspec(dllexport)
#else  /* CRTDLL */
#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else  /* _DLL */
#define _CRTIMP
#endif  /* _DLL */
#endif  /* CRTDLL */
#endif  /* _CRTIMP */

/* Define __cdecl for non-Microsoft compilers */

#if (!defined (_MSC_VER) && !defined (__cdecl))
#define __cdecl
#endif  /* (!defined (_MSC_VER) && !defined (__cdecl)) */

/* Define _CRTAPI1 (for compatibility with the NT SDK) */

#ifndef _CRTAPI1
#if _MSC_VER >= 800 && _M_IX86 >= 300
#define _CRTAPI1 __cdecl
#else  /* _MSC_VER >= 800 && _M_IX86 >= 300 */
#define _CRTAPI1
#endif  /* _MSC_VER >= 800 && _M_IX86 >= 300 */
#endif  /* _CRTAPI1 */

#ifndef _SIG_ATOMIC_T_DEFINED
typedef int sig_atomic_t;
#define _SIG_ATOMIC_T_DEFINED
#endif  /* _SIG_ATOMIC_T_DEFINED */

#define NSIG 23     /* maximum signal number + 1 */


/* Signal types */

#define SIGINT          2       /* interrupt */
#define SIGILL          4       /* illegal instruction - invalid function image */
#define SIGFPE          8       /* floating point exception */
#define SIGSEGV         11      /* segment violation */
#define SIGTERM         15      /* Software termination signal from kill */
#define SIGBREAK        21      /* Ctrl-Break sequence */
#define SIGABRT         22      /* abnormal termination triggered by abort call */


/* signal action codes */

#define SIG_DFL (void (__cdecl *)(int))0           /* default signal action */
#define SIG_IGN (void (__cdecl *)(int))1           /* ignore signal */
#define SIG_SGE (void (__cdecl *)(int))3           /* signal gets error */
#define SIG_ACK (void (__cdecl *)(int))4           /* acknowledge */

#ifndef _INTERNAL_IFSTRIP_
/* internal use only! not valid as an argument to signal() */

#define SIG_GET (void (__cdecl *)(int))2           /* accept signal */
#define SIG_DIE (void (__cdecl *)(int))5           /* terminate process */
#endif  /* _INTERNAL_IFSTRIP_ */

/* signal error value (returned by signal call on error) */

#define SIG_ERR (void (__cdecl *)(int))-1          /* signal error value */


/* pointer to exception information pointers structure */

#if defined (_MT) || defined (_DLL)
extern void * * __cdecl __pxcptinfoptrs(void);
#define _pxcptinfoptrs  (*__pxcptinfoptrs())
#else  /* defined (_MT) || defined (_DLL) */
extern void * _pxcptinfoptrs;
#endif  /* defined (_MT) || defined (_DLL) */


/* Function prototypes */

_CRTIMP void (__cdecl * __cdecl signal(int, void (__cdecl *)(int)))(int);
_CRTIMP int __cdecl raise(int);


#ifdef __cplusplus
}
#endif  /* __cplusplus */

#endif  /* _INC_SIGNAL */