/*
* signal.h
*
* A way to set handlers for exceptional conditions (also known as signals).
*
* This file is part of the Mingw32 package.
*
* Contributors:
* Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
*
* THIS SOFTWARE IS NOT COPYRIGHTED
*
* This source code is offered for use in the public domain. You may
* use, modify or distribute it freely.
*
* This code is distributed in the hope that it will be useful but
* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
* DISCLAIMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* $Revision: 1.2 $
* $Author: bellard $
* $Date: 2005/04/17 13:14:29 $
*
*/
#ifndef _SIGNAL_H_
#define _SIGNAL_H_
/* All the headers include this file. */
#include <_mingw.h>
/*
* The actual signal values. Using other values with signal
* produces a SIG_ERR return value.
*
* NOTE: SIGINT is produced when the user presses Ctrl-C.
* SIGILL has not been tested.
* SIGFPE doesn't seem to work?
* SIGSEGV does not catch writing to a NULL pointer (that shuts down
* your app; can you say "segmentation violation core dump"?).
* SIGTERM comes from what kind of termination request exactly?
* SIGBREAK is indeed produced by pressing Ctrl-Break.
* SIGABRT is produced by calling abort.
* TODO: The above results may be related to not installing an appropriate
* structured exception handling frame. Results may be better if I ever
* manage to get the SEH stuff down.
*/
#define SIGINT 2 /* Interactive attention */
#define SIGILL 4 /* Illegal instruction */
#define SIGFPE 8 /* Floating point error */
#define SIGSEGV 11 /* Segmentation violation */
#define SIGTERM 15 /* Termination request */
#define SIGBREAK 21 /* Control-break */
#define SIGABRT 22 /* Abnormal termination (abort) */
#define NSIG 23 /* maximum signal number + 1 */
#ifndef RC_INVOKED
#ifndef _SIG_ATOMIC_T_DEFINED
typedef int sig_atomic_t;
#define _SIG_ATOMIC_T_DEFINED
#endif
/*
* The prototypes (below) are the easy part. The hard part is figuring
* out what signals are available and what numbers they are assigned
* along with appropriate values of SIG_DFL and SIG_IGN.
*/
/*
* A pointer to a signal handler function. A signal handler takes a
* single int, which is the signal it handles.
*/
typedef void (*__p_sig_fn_t)(int);
/*
* These are special values of signal handler pointers which are
* used to send a signal to the default handler (SIG_DFL), ignore
* the signal (SIG_IGN), or indicate an error return (SIG_ERR).
*/
#define SIG_DFL ((__p_sig_fn_t) 0)
#define SIG_IGN ((__p_sig_fn_t) 1)
#define SIG_ERR ((__p_sig_fn_t) -1)
#ifdef __cplusplus
extern "C" {
#endif
/*
* Call signal to set the signal handler for signal sig to the
* function pointed to by handler. Returns a pointer to the
* previous handler, or SIG_ERR if an error occurs. Initially
* unhandled signals defined above will return SIG_DFL.
*/
__p_sig_fn_t signal(int, __p_sig_fn_t);
/*
* Raise the signal indicated by sig. Returns non-zero on success.
*/
int raise (int);
#ifdef __cplusplus
}
#endif
#endif /* Not RC_INVOKED */
#endif /* Not _SIGNAL_H_ */