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59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
#ifndef IOSIGNAL_H
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#define IOSIGNAL_H
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#include "ntp_refclock.h"
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/*
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* Some systems (MOST) define SIGPOLL == SIGIO, others SIGIO == SIGPOLL, and
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* a few have separate SIGIO and SIGPOLL signals. This code checks for the
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* SIGIO == SIGPOLL case at compile time.
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* Do not define USE_SIGPOLL or USE_SIGIO.
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* these are interal only to iosignal.c and ntpd/work_fork.c!
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*/
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#if defined(USE_SIGPOLL)
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# undef USE_SIGPOLL
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#endif
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#if defined(USE_SIGIO)
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# undef USE_SIGIO
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#endif
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/* type of input handler function - only shared between iosignal.c and ntp_io.c */
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typedef void (input_handler_t)(l_fp *);
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#if defined(HAVE_SIGNALED_IO)
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# if defined(USE_TTY_SIGPOLL) || defined(USE_UDP_SIGPOLL)
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# define USE_SIGPOLL
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# endif
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# if !defined(USE_TTY_SIGPOLL) || !defined(USE_UDP_SIGPOLL)
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# define USE_SIGIO
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# endif
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# if defined(USE_SIGIO) && defined(USE_SIGPOLL)
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# if SIGIO == SIGPOLL
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# define USE_SIGIO
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# undef USE_SIGPOLL
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# endif /* SIGIO == SIGPOLL */
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# endif /* USE_SIGIO && USE_SIGPOLL */
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#define USING_SIGIO() using_sigio
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extern int using_sigio;
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extern void block_sigio (void);
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extern void unblock_sigio (void);
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extern int init_clock_sig (struct refclockio *);
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extern void init_socket_sig (int);
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extern void set_signal (input_handler_t *);
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# define BLOCKIO() block_sigio()
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# define UNBLOCKIO() unblock_sigio()
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#else /* !HAVE_SIGNALED_IO follows */
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# define BLOCKIO() do {} while (0)
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# define UNBLOCKIO() do {} while (0)
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# define USING_SIGIO() FALSE
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#endif
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#endif /* IOSIGNAL_H */
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