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768b24eb0e
* configure.ac (toplevel): Check whether GNU/Linux-specific timerfd functions and macros are available. * m4/clock_time.m4 (gl_CLOCK_TIME): Check for clock_getres as well. * src/atimer.c (toplevel) [HAVE_TIMERFD]: Include sys/timerfd.h. (toplevel): Rename alarm_timer_ok to special_timer_available. [HAVE_TIMERFD]: Declare timerfd. [HAVE_CLOCK_GETRES]: Declare resolution. (start_atimer) [HAVE_CLOCK_GETRES]: Round up timestamp to system timer resolution. (set_alarm) [HAVE_TIMERFD]: Use timerfd_settime. (timerfd_callback) [HAVE_TIMERFD]: New function. (atimer_result, debug_timer_callback, Fdebug_timer_check) [ENABLE_CHECKING]: New function for the sake of automated tests. (init_atimer) [HAVE_TIMERFD]: Setup timerfd. [HAVE_CLOCK_GETRES]: Likewise for system timer resolution. [ENABLE_CHECKING]: Defsubr test function. * src/atimer.h (timerfd_callback) [HAVE_TIMERFD]: Add prototype. * src/lisp.h (add_timer_wait_descriptor) [HAVE_TIMERFD]: Likewise. * src/process.c (add_timer_wait_descriptor) [HAVE_TIMERFD]: New function. * test/automated/timer-tests.el (timer-tests-debug-timer-check): New test.
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/* Asynchronous timers.
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Copyright (C) 2000-2014 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef EMACS_ATIMER_H
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#define EMACS_ATIMER_H
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#include <time.h>
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/* Forward declaration. */
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struct atimer;
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/* Types of timers. */
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enum atimer_type
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{
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/* Timer is ripe at some absolute time. */
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ATIMER_ABSOLUTE,
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/* Timer is ripe at now plus an offset. */
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ATIMER_RELATIVE,
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/* Timer runs continuously. */
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ATIMER_CONTINUOUS
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};
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/* Type of timer callback functions. */
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typedef void (* atimer_callback) (struct atimer *timer);
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/* Structure describing an asynchronous timer. */
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struct atimer
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{
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/* The type of this timer. */
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enum atimer_type type;
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/* Time when this timer is ripe. */
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struct timespec expiration;
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/* Interval of this timer. */
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struct timespec interval;
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/* Function to call when timer is ripe. Interrupt input is
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guaranteed to not be blocked when this function is called. */
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atimer_callback fn;
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/* Additional user-specified data to pass to FN. */
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void *client_data;
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/* Next in list of active or free atimers. */
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struct atimer *next;
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};
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/* Function prototypes. */
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struct atimer *start_atimer (enum atimer_type, struct timespec,
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atimer_callback, void *);
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void cancel_atimer (struct atimer *);
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void do_pending_atimers (void);
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void init_atimer (void);
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void turn_on_atimers (bool);
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void stop_other_atimers (struct atimer *);
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void run_all_atimers (void);
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#ifdef HAVE_TIMERFD
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void timerfd_callback (int, void *);
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#endif
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#endif /* EMACS_ATIMER_H */
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