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99 lines
3 KiB
C
99 lines
3 KiB
C
/*
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* signal.h
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is a part of the mingw-runtime package.
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* No warranty is given; refer to the file DISCLAIMER within the package.
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*
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* A way to set handlers for exceptional conditions (also known as signals).
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*
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*/
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#ifndef _SIGNAL_H_
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#define _SIGNAL_H_
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/* All the headers include this file. */
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#include <_mingw.h>
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/*
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* The actual signal values. Using other values with signal
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* produces a SIG_ERR return value.
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*
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* NOTE: SIGINT is produced when the user presses Ctrl-C.
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* SIGILL has not been tested.
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* SIGFPE doesn't seem to work?
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* SIGSEGV does not catch writing to a NULL pointer (that shuts down
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* your app; can you say "segmentation violation core dump"?).
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* SIGTERM comes from what kind of termination request exactly?
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* SIGBREAK is indeed produced by pressing Ctrl-Break.
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* SIGABRT is produced by calling abort.
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* TODO: The above results may be related to not installing an appropriate
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* structured exception handling frame. Results may be better if I ever
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* manage to get the SEH stuff down.
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*/
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#define SIGINT 2 /* Interactive attention */
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#define SIGILL 4 /* Illegal instruction */
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#define SIGFPE 8 /* Floating point error */
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#define SIGSEGV 11 /* Segmentation violation */
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#define SIGTERM 15 /* Termination request */
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#define SIGBREAK 21 /* Control-break */
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#define SIGABRT 22 /* Abnormal termination (abort) */
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#define NSIG 23 /* maximum signal number + 1 */
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#ifndef RC_INVOKED
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#ifndef _SIG_ATOMIC_T_DEFINED
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typedef int sig_atomic_t;
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#define _SIG_ATOMIC_T_DEFINED
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#endif
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/*
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* The prototypes (below) are the easy part. The hard part is figuring
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* out what signals are available and what numbers they are assigned
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* along with appropriate values of SIG_DFL and SIG_IGN.
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*/
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/*
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* A pointer to a signal handler function. A signal handler takes a
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* single int, which is the signal it handles.
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*/
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typedef void (*__p_sig_fn_t)(int);
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/*
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* These are special values of signal handler pointers which are
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* used to send a signal to the default handler (SIG_DFL), ignore
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* the signal (SIG_IGN), indicate an error return (SIG_ERR),
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* get an error (SIG_SGE), or acknowledge (SIG_ACK).
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*/
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#define SIG_DFL ((__p_sig_fn_t) 0)
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#define SIG_IGN ((__p_sig_fn_t) 1)
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#define SIG_ERR ((__p_sig_fn_t) -1)
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#define SIG_SGE ((__p_sig_fn_t) 3)
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#define SIG_ACK ((__p_sig_fn_t) 4)
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Call signal to set the signal handler for signal sig to the
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* function pointed to by handler. Returns a pointer to the
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* previous handler, or SIG_ERR if an error occurs. Initially
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* unhandled signals defined above will return SIG_DFL.
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*/
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_CRTIMP __p_sig_fn_t __cdecl __MINGW_NOTHROW signal(int, __p_sig_fn_t);
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/*
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* Raise the signal indicated by sig. Returns non-zero on success.
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*/
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_CRTIMP int __cdecl __MINGW_NOTHROW raise (int);
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#ifdef __cplusplus
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}
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#endif
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#endif /* Not RC_INVOKED */
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#endif /* Not _SIGNAL_H_ */
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