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108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
// Define Py_NSIG constant for signal handling.
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#ifndef Py_INTERNAL_SIGNAL_H
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#define Py_INTERNAL_SIGNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include <signal.h> // NSIG
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// Restore signals that the interpreter has called SIG_IGN on to SIG_DFL.
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// Export for '_posixsubprocess' shared extension.
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PyAPI_FUNC(void) _Py_RestoreSignals(void);
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#ifdef _SIG_MAXSIG
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// gh-91145: On FreeBSD, <signal.h> defines NSIG as 32: it doesn't include
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// realtime signals: [SIGRTMIN,SIGRTMAX]. Use _SIG_MAXSIG instead. For
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// example on x86-64 FreeBSD 13, SIGRTMAX is 126 and _SIG_MAXSIG is 128.
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# define Py_NSIG _SIG_MAXSIG
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#elif defined(NSIG)
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# define Py_NSIG NSIG
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#elif defined(_NSIG)
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# define Py_NSIG _NSIG // BSD/SysV
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#elif defined(_SIGMAX)
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# define Py_NSIG (_SIGMAX + 1) // QNX
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#elif defined(SIGMAX)
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# define Py_NSIG (SIGMAX + 1) // djgpp
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#else
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# define Py_NSIG 64 // Use a reasonable default value
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#endif
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#define INVALID_FD (-1)
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struct _signals_runtime_state {
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struct {
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// tripped and func should be accessed using atomic ops.
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int tripped;
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PyObject* func;
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} handlers[Py_NSIG];
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volatile struct {
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#ifdef MS_WINDOWS
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/* This would be "SOCKET fd" if <winsock2.h> were always included.
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It isn't so we must cast to SOCKET where appropriate. */
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volatile int fd;
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#elif defined(__VXWORKS__)
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int fd;
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#else
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sig_atomic_t fd;
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#endif
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int warn_on_full_buffer;
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#ifdef MS_WINDOWS
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int use_send;
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#endif
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} wakeup;
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/* Speed up sigcheck() when none tripped.
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is_tripped should be accessed using atomic ops. */
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int is_tripped;
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/* These objects necessarily belong to the main interpreter. */
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PyObject *default_handler;
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PyObject *ignore_handler;
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#ifdef MS_WINDOWS
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/* This would be "HANDLE sigint_event" if <windows.h> were always included.
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It isn't so we must cast to HANDLE everywhere "sigint_event" is used. */
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void *sigint_event;
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#endif
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/* True if the main interpreter thread exited due to an unhandled
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* KeyboardInterrupt exception, suggesting the user pressed ^C. */
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int unhandled_keyboard_interrupt;
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};
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#ifdef MS_WINDOWS
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# define _signals_WAKEUP_INIT \
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{.fd = INVALID_FD, .warn_on_full_buffer = 1, .use_send = 0}
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#else
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# define _signals_WAKEUP_INIT \
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{.fd = INVALID_FD, .warn_on_full_buffer = 1}
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#endif
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#define _signals_RUNTIME_INIT \
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{ \
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.wakeup = _signals_WAKEUP_INIT, \
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}
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// Export for '_multiprocessing' shared extension
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PyAPI_FUNC(int) _PyOS_IsMainThread(void);
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#ifdef MS_WINDOWS
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// <windows.h> is not included by Python.h so use void* instead of HANDLE.
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// Export for '_multiprocessing' shared extension
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PyAPI_FUNC(void*) _PyOS_SigintEvent(void);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif // !Py_INTERNAL_SIGNAL_H
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