diff options
Diffstat (limited to 'include/iosignal.h')
| -rw-r--r-- | include/iosignal.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/include/iosignal.h b/include/iosignal.h new file mode 100644 index 0000000000000..406804e14c668 --- /dev/null +++ b/include/iosignal.h @@ -0,0 +1,58 @@ +#ifndef IOSIGNAL_H +#define IOSIGNAL_H + +#include "ntp_refclock.h" + + /* + * Some systems (MOST) define SIGPOLL == SIGIO, others SIGIO == SIGPOLL, and + * a few have separate SIGIO and SIGPOLL signals. This code checks for the + * SIGIO == SIGPOLL case at compile time. + * Do not define USE_SIGPOLL or USE_SIGIO. + * these are interal only to iosignal.c and ntpd/work_fork.c! + */ +#if defined(USE_SIGPOLL) +# undef USE_SIGPOLL +#endif +#if defined(USE_SIGIO) +# undef USE_SIGIO +#endif + +/* type of input handler function - only shared between iosignal.c and ntp_io.c */ +typedef void (input_handler_t)(l_fp *); + +#if defined(HAVE_SIGNALED_IO) +# if defined(USE_TTY_SIGPOLL) || defined(USE_UDP_SIGPOLL) +# define USE_SIGPOLL +# endif + +# if !defined(USE_TTY_SIGPOLL) || !defined(USE_UDP_SIGPOLL) +# define USE_SIGIO +# endif + +# if defined(USE_SIGIO) && defined(USE_SIGPOLL) +# if SIGIO == SIGPOLL +# define USE_SIGIO +# undef USE_SIGPOLL +# endif /* SIGIO == SIGPOLL */ +# endif /* USE_SIGIO && USE_SIGPOLL */ + +#define USING_SIGIO() using_sigio + +extern int using_sigio; + +extern void block_sigio (void); +extern void unblock_sigio (void); +extern int init_clock_sig (struct refclockio *); +extern void init_socket_sig (int); +extern void set_signal (input_handler_t *); + +# define BLOCKIO() block_sigio() +# define UNBLOCKIO() unblock_sigio() + +#else /* !HAVE_SIGNALED_IO follows */ +# define BLOCKIO() do {} while (0) +# define UNBLOCKIO() do {} while (0) +# define USING_SIGIO() FALSE +#endif + +#endif /* IOSIGNAL_H */ |