1 /* SPDX-License-Identifier: BSD-2-Clause */
3 * dhcpcd - DHCP client daemon
4 * Copyright (c) 2006-2021 Roy Marples <roy@marples.name>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 /* Handy macros to create subsecond timeouts */
35 #define CSEC_PER_SEC 100
36 #define MSEC_PER_SEC 1000
37 #define NSEC_PER_CSEC 10000000
38 #define NSEC_PER_MSEC 1000000
39 #define NSEC_PER_SEC 1000000000
41 /* eloop queues are really only for deleting timeouts registered
42 * for a function or object.
43 * The idea being that one interface has different timeouts for
44 * say DHCP and DHCPv6. */
49 /* Used for deleting a timeout for all queues. */
50 #define ELOOP_QUEUE_ALL 0
52 /* Forward declare eloop - the content should be invisible to the outside */
55 unsigned long long eloop_timespec_diff(const struct timespec *tsp,
56 const struct timespec *usp, unsigned int *nsp);
57 size_t eloop_event_count(const struct eloop *);
58 int eloop_event_add_rw(struct eloop *, int,
59 void (*)(void *), void *,
60 void (*)(void *), void *);
61 int eloop_event_add(struct eloop *, int,
62 void (*)(void *), void *);
63 int eloop_event_add_w(struct eloop *, int,
64 void (*)(void *), void *);
65 #define eloop_event_delete(eloop, fd) \
66 eloop_event_delete_write((eloop), (fd), 0)
67 #define eloop_event_remove_writecb(eloop, fd) \
68 eloop_event_delete_write((eloop), (fd), 1)
69 int eloop_event_delete_write(struct eloop *, int, int);
71 #define eloop_timeout_add_tv(eloop, tv, cb, ctx) \
72 eloop_q_timeout_add_tv((eloop), ELOOP_QUEUE, (tv), (cb), (ctx))
73 #define eloop_timeout_add_sec(eloop, tv, cb, ctx) \
74 eloop_q_timeout_add_sec((eloop), ELOOP_QUEUE, (tv), (cb), (ctx))
75 #define eloop_timeout_add_msec(eloop, ms, cb, ctx) \
76 eloop_q_timeout_add_msec((eloop), ELOOP_QUEUE, (ms), (cb), (ctx))
77 #define eloop_timeout_delete(eloop, cb, ctx) \
78 eloop_q_timeout_delete((eloop), ELOOP_QUEUE, (cb), (ctx))
79 int eloop_q_timeout_add_tv(struct eloop *, int,
80 const struct timespec *, void (*)(void *), void *);
81 int eloop_q_timeout_add_sec(struct eloop *, int,
82 unsigned int, void (*)(void *), void *);
83 int eloop_q_timeout_add_msec(struct eloop *, int,
84 unsigned long, void (*)(void *), void *);
85 int eloop_q_timeout_delete(struct eloop *, int, void (*)(void *), void *);
87 void eloop_signal_set_cb(struct eloop *, const int *, size_t,
88 void (*)(int, void *), void *);
89 int eloop_signal_mask(struct eloop *, sigset_t *oldset);
91 struct eloop * eloop_new(void);
92 void eloop_clear(struct eloop *);
93 void eloop_free(struct eloop *);
94 void eloop_exit(struct eloop *, int);
95 void eloop_enter(struct eloop *);
96 int eloop_start(struct eloop *, sigset_t *);