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