Samuel Tan | d7ed851 | 2015-08-13 16:11:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dhcpcd - DHCP client daemon |
| 3 | * Copyright (c) 2006-2015 Roy Marples <roy@marples.name> |
| 4 | * All rights reserved |
| 5 | |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 | * SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #ifndef ELOOP_H |
| 29 | #define ELOOP_H |
| 30 | |
| 31 | #include <time.h> |
| 32 | |
| 33 | #include "config.h" |
| 34 | |
| 35 | #ifndef ELOOP_QUEUE |
| 36 | #define ELOOP_QUEUE 1 |
| 37 | #endif |
| 38 | |
| 39 | /* EXIT_FAILURE is a non zero value and EXIT_SUCCESS is zero. |
| 40 | * To add a CONTINUE definition, simply do the opposite of EXIT_FAILURE. */ |
| 41 | #define ELOOP_CONTINUE -EXIT_FAILURE |
| 42 | |
| 43 | struct eloop_event { |
| 44 | TAILQ_ENTRY(eloop_event) next; |
| 45 | int fd; |
| 46 | void (*read_cb)(void *); |
| 47 | void *read_cb_arg; |
| 48 | void (*write_cb)(void *); |
| 49 | void *write_cb_arg; |
| 50 | #if !defined(HAVE_KQUEUE) && !defined(HAVE_EPOLL) |
| 51 | struct pollfd *pollfd; |
| 52 | #endif |
| 53 | }; |
| 54 | |
| 55 | struct eloop_timeout { |
| 56 | TAILQ_ENTRY(eloop_timeout) next; |
| 57 | struct timespec when; |
| 58 | void (*callback)(void *); |
| 59 | void *arg; |
| 60 | int queue; |
| 61 | }; |
| 62 | |
| 63 | struct eloop_ctx { |
| 64 | struct dhcpcd_ctx *ctx; |
| 65 | |
| 66 | size_t events_len; |
| 67 | TAILQ_HEAD (event_head, eloop_event) events; |
| 68 | struct event_head free_events; |
| 69 | |
| 70 | TAILQ_HEAD (timeout_head, eloop_timeout) timeouts; |
| 71 | struct timeout_head free_timeouts; |
| 72 | |
| 73 | void (*timeout0)(void *); |
| 74 | void *timeout0_arg; |
| 75 | |
| 76 | #if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL) |
| 77 | int poll_fd; |
| 78 | #else |
| 79 | struct pollfd *fds; |
| 80 | size_t fds_len; |
| 81 | #endif |
| 82 | |
| 83 | int exitnow; |
| 84 | int exitcode; |
| 85 | }; |
| 86 | |
| 87 | #define eloop_timeout_add_tv(a, b, c, d) \ |
| 88 | eloop_q_timeout_add_tv(a, ELOOP_QUEUE, b, c, d) |
| 89 | #define eloop_timeout_add_sec(a, b, c, d) \ |
| 90 | eloop_q_timeout_add_sec(a, ELOOP_QUEUE, b, c, d) |
| 91 | #define eloop_timeout_delete(a, b, c) \ |
| 92 | eloop_q_timeout_delete(a, ELOOP_QUEUE, b, c) |
| 93 | |
| 94 | int eloop_event_add(struct eloop_ctx *, int, |
| 95 | void (*)(void *), void *, |
| 96 | void (*)(void *), void *); |
| 97 | void eloop_event_delete(struct eloop_ctx *, int, int); |
| 98 | int eloop_q_timeout_add_sec(struct eloop_ctx *, int queue, |
| 99 | time_t, void (*)(void *), void *); |
| 100 | int eloop_q_timeout_add_tv(struct eloop_ctx *, int queue, |
| 101 | const struct timespec *, void (*)(void *), void *); |
| 102 | #if !defined(HAVE_KQUEUE) |
| 103 | int eloop_timeout_add_now(struct eloop_ctx *, void (*)(void *), void *); |
| 104 | #endif |
| 105 | void eloop_q_timeout_delete(struct eloop_ctx *, int, void (*)(void *), void *); |
| 106 | struct eloop_ctx * eloop_init(struct dhcpcd_ctx *); |
| 107 | #if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL) |
| 108 | int eloop_requeue(struct eloop_ctx *); |
| 109 | #else |
| 110 | #define eloop_requeue(a) (0) |
| 111 | #endif |
| 112 | void eloop_free(struct eloop_ctx *); |
| 113 | void eloop_exit(struct eloop_ctx *, int); |
| 114 | int eloop_start(struct eloop_ctx *); |
| 115 | |
| 116 | #endif |