2 * Event loop - empty template (basic structure, but no OS specific operations)
3 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
25 void (*handler)(int sock, void *eloop_ctx, void *sock_ctx);
28 struct eloop_timeout {
32 void (*handler)(void *eloop_ctx, void *sock_ctx);
33 struct eloop_timeout *next;
39 void (*handler)(int sig, void *eloop_ctx, void *signal_ctx);
44 int max_sock, reader_count;
45 struct eloop_sock *readers;
47 struct eloop_timeout *timeout;
50 struct eloop_signal *signals;
52 int pending_terminate;
55 int reader_table_changed;
58 static struct eloop_data eloop;
63 memset(&eloop, 0, sizeof(eloop));
68 int eloop_register_read_sock(int sock,
69 void (*handler)(int sock, void *eloop_ctx,
71 void *eloop_data, void *user_data)
73 struct eloop_sock *tmp;
75 tmp = (struct eloop_sock *)
76 realloc(eloop.readers,
77 (eloop.reader_count + 1) * sizeof(struct eloop_sock));
81 tmp[eloop.reader_count].sock = sock;
82 tmp[eloop.reader_count].eloop_data = eloop_data;
83 tmp[eloop.reader_count].user_data = user_data;
84 tmp[eloop.reader_count].handler = handler;
87 if (sock > eloop.max_sock)
88 eloop.max_sock = sock;
89 eloop.reader_table_changed = 1;
95 void eloop_unregister_read_sock(int sock)
99 if (eloop.readers == NULL || eloop.reader_count == 0)
102 for (i = 0; i < eloop.reader_count; i++) {
103 if (eloop.readers[i].sock == sock)
106 if (i == eloop.reader_count)
108 if (i != eloop.reader_count - 1) {
109 memmove(&eloop.readers[i], &eloop.readers[i + 1],
110 (eloop.reader_count - i - 1) *
111 sizeof(struct eloop_sock));
113 eloop.reader_count--;
114 eloop.reader_table_changed = 1;
118 int eloop_register_timeout(unsigned int secs, unsigned int usecs,
119 void (*handler)(void *eloop_ctx, void *timeout_ctx),
120 void *eloop_data, void *user_data)
122 struct eloop_timeout *timeout, *tmp, *prev;
124 timeout = (struct eloop_timeout *) malloc(sizeof(*timeout));
127 os_get_time(&timeout->time);
128 timeout->time.sec += secs;
129 timeout->time.usec += usecs;
130 while (timeout->time.usec >= 1000000) {
132 timeout->time.usec -= 1000000;
134 timeout->eloop_data = eloop_data;
135 timeout->user_data = user_data;
136 timeout->handler = handler;
137 timeout->next = NULL;
139 if (eloop.timeout == NULL) {
140 eloop.timeout = timeout;
146 while (tmp != NULL) {
147 if (os_time_before(&timeout->time, &tmp->time))
154 timeout->next = eloop.timeout;
155 eloop.timeout = timeout;
157 timeout->next = prev->next;
158 prev->next = timeout;
165 int eloop_cancel_timeout(void (*handler)(void *eloop_ctx, void *sock_ctx),
166 void *eloop_data, void *user_data)
168 struct eloop_timeout *timeout, *prev, *next;
172 timeout = eloop.timeout;
173 while (timeout != NULL) {
174 next = timeout->next;
176 if (timeout->handler == handler &&
177 (timeout->eloop_data == eloop_data ||
178 eloop_data == ELOOP_ALL_CTX) &&
179 (timeout->user_data == user_data ||
180 user_data == ELOOP_ALL_CTX)) {
182 eloop.timeout = next;
197 int eloop_is_timeout_registered(void (*handler)(void *eloop_ctx,
199 void *eloop_data, void *user_data)
201 struct eloop_timeout *tmp;
204 while (tmp != NULL) {
205 if (tmp->handler == handler &&
206 tmp->eloop_data == eloop_data &&
207 tmp->user_data == user_data)
217 /* TODO: replace with suitable signal handler */
219 static void eloop_handle_signal(int sig)
224 for (i = 0; i < eloop.signal_count; i++) {
225 if (eloop.signals[i].sig == sig) {
226 eloop.signals[i].signaled++;
234 static void eloop_process_pending_signals(void)
238 if (eloop.signaled == 0)
242 if (eloop.pending_terminate) {
243 eloop.pending_terminate = 0;
246 for (i = 0; i < eloop.signal_count; i++) {
247 if (eloop.signals[i].signaled) {
248 eloop.signals[i].signaled = 0;
249 eloop.signals[i].handler(eloop.signals[i].sig,
251 eloop.signals[i].user_data);
257 int eloop_register_signal(int sig,
258 void (*handler)(int sig, void *eloop_ctx,
262 struct eloop_signal *tmp;
264 tmp = (struct eloop_signal *)
265 realloc(eloop.signals,
266 (eloop.signal_count + 1) *
267 sizeof(struct eloop_signal));
271 tmp[eloop.signal_count].sig = sig;
272 tmp[eloop.signal_count].user_data = user_data;
273 tmp[eloop.signal_count].handler = handler;
274 tmp[eloop.signal_count].signaled = 0;
275 eloop.signal_count++;
278 /* TODO: register signal handler */
284 int eloop_register_signal_terminate(void (*handler)(int sig, void *eloop_ctx,
289 /* TODO: for example */
290 int ret = eloop_register_signal(SIGINT, handler, user_data);
292 ret = eloop_register_signal(SIGTERM, handler, user_data);
299 int eloop_register_signal_reconfig(void (*handler)(int sig, void *eloop_ctx,
304 /* TODO: for example */
305 return eloop_register_signal(SIGHUP, handler, user_data);
314 struct os_time tv, now;
316 while (!eloop.terminate &&
317 (eloop.timeout || eloop.reader_count > 0)) {
320 if (os_time_before(&now, &eloop.timeout->time))
321 os_time_sub(&eloop.timeout->time, &now, &tv);
323 tv.sec = tv.usec = 0;
327 * TODO: wait for any event (read socket ready, timeout (tv),
330 os_sleep(1, 0); /* just a dummy wait for testing */
332 eloop_process_pending_signals();
334 /* check if some registered timeouts have occurred */
336 struct eloop_timeout *tmp;
339 if (!os_time_before(&now, &eloop.timeout->time)) {
341 eloop.timeout = eloop.timeout->next;
342 tmp->handler(tmp->eloop_data,
349 eloop.reader_table_changed = 0;
350 for (i = 0; i < eloop.reader_count; i++) {
352 * TODO: call each handler that has pending data to
355 if (0 /* TODO: eloop.readers[i].sock ready */) {
356 eloop.readers[i].handler(
357 eloop.readers[i].sock,
358 eloop.readers[i].eloop_data,
359 eloop.readers[i].user_data);
360 if (eloop.reader_table_changed)
368 void eloop_terminate(void)
374 void eloop_destroy(void)
376 struct eloop_timeout *timeout, *prev;
378 timeout = eloop.timeout;
379 while (timeout != NULL) {
381 timeout = timeout->next;
389 int eloop_terminated(void)
391 return eloop.terminate;
395 void eloop_wait_for_read_sock(int sock)
398 * TODO: wait for the file descriptor to have something available for