114 lines
5.1 KiB
C
114 lines
5.1 KiB
C
/* $NetBSD: eloop.h,v 1.10 2016/04/10 21:00:53 roy Exp $ */
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/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2016 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef ELOOP_H
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#define ELOOP_H
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#include <time.h>
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/* Some systems don't define timespec macros */
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#ifndef timespecclear
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#define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
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#define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
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#define timespeccmp(tsp, usp, cmp) \
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(((tsp)->tv_sec == (usp)->tv_sec) ? \
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((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
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((tsp)->tv_sec cmp (usp)->tv_sec))
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#define timespecadd(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
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if ((vsp)->tv_nsec >= 1000000000L) { \
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(vsp)->tv_sec++; \
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(vsp)->tv_nsec -= 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#define timespecsub(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
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if ((vsp)->tv_nsec < 0) { \
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(vsp)->tv_sec--; \
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(vsp)->tv_nsec += 1000000000L; \
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} \
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} while (/* CONSTCOND */ 0)
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#endif
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/* eloop queues are really only for deleting timeouts registered
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* for a function or object.
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* The idea being that one interface has different timeouts for
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* say DHCP and DHCPv6. */
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#ifndef ELOOP_QUEUE
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#define ELOOP_QUEUE 1
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#endif
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/* Forward declare eloop - the content should be invisible to the outside */
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struct eloop;
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int eloop_event_add_rw(struct eloop *, int,
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void (*)(void *), void *,
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void (*)(void *), void *);
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int eloop_event_add(struct eloop *, int,
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void (*)(void *), void *);
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int eloop_event_add_w(struct eloop *, int,
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void (*)(void *), void *);
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#define eloop_event_delete(eloop, fd) \
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eloop_event_delete_write((eloop), (fd), 0)
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#define eloop_event_remove_writecb(eloop, fd) \
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eloop_event_delete_write((eloop), (fd), 1)
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void eloop_event_delete_write(struct eloop *, int, int);
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#define eloop_timeout_add_tv(eloop, tv, cb, ctx) \
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eloop_q_timeout_add_tv((eloop), ELOOP_QUEUE, (tv), (cb), (ctx))
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#define eloop_timeout_add_sec(eloop, tv, cb, ctx) \
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eloop_q_timeout_add_sec((eloop), ELOOP_QUEUE, (tv), (cb), (ctx))
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#define eloop_timeout_add_msec(eloop, ms, cb, ctx) \
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eloop_q_timeout_add_msec((eloop), ELOOP_QUEUE, (ms), (cb), (ctx))
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#define eloop_timeout_delete(eloop, cb, ctx) \
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eloop_q_timeout_delete((eloop), ELOOP_QUEUE, (cb), (ctx))
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int eloop_q_timeout_add_tv(struct eloop *, int,
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const struct timespec *, void (*)(void *), void *);
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int eloop_q_timeout_add_sec(struct eloop *, int,
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time_t, void (*)(void *), void *);
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int eloop_q_timeout_add_msec(struct eloop *, int,
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long, void (*)(void *), void *);
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void eloop_q_timeout_delete(struct eloop *, int, void (*)(void *), void *);
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int eloop_signal_set_cb(struct eloop *, const int *, size_t,
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void (*)(int, void *), void *);
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int eloop_signal_mask(struct eloop *, sigset_t *oldset);
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struct eloop * eloop_new(void);
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int eloop_requeue(struct eloop *);
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void eloop_free(struct eloop *);
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void eloop_exit(struct eloop *, int);
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int eloop_start(struct eloop *, sigset_t *);
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#endif
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