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/* |
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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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|
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#ifndef _SIGNAL_H_ |
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#define _SIGNAL_H_ |
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|
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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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/* |
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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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|
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#define NSIG 23 /* maximum signal number + 1 */ |
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|
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#ifndef RC_INVOKED |
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|
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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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/* |
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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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/* |
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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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/* |
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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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|
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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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/* |
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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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/* |
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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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|
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#ifdef __cplusplus |
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} |
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#endif |
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|
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#endif /* Not RC_INVOKED */ |
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|
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#endif /* Not _SIGNAL_H_ */ |
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