1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2015 Roy Marples <roy (at) 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 117
