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);
46 int max_sock, reader_count;
47 struct eloop_sock *readers;
49 struct eloop_timeout *timeout;
52 struct eloop_signal *signals;
54 int pending_terminate;
57 int reader_table_changed;
60 static struct eloop_data eloop;
63 int eloop_init(void *user_data)
65 memset(&eloop, 0, sizeof(eloop));
66 eloop.user_data = user_data;
71 int eloop_register_read_sock(int sock,
72 void (*handler)(int sock, void *eloop_ctx,
74 void *eloop_data, void *user_data)
76 struct eloop_sock *tmp;
78 tmp = (struct eloop_sock *)
79 realloc(eloop.readers,
80 (eloop.reader_count + 1) * sizeof(struct eloop_sock));
84 tmp[eloop.reader_count].sock = sock;
85 tmp[eloop.reader_count].eloop_data = eloop_data;
86 tmp[eloop.reader_count].user_data = user_data;
87 tmp[eloop.reader_count].handler = handler;
90 if (sock > eloop.max_sock)
91 eloop.max_sock = sock;
92 eloop.reader_table_changed = 1;
98 void eloop_unregister_read_sock(int sock)
102 if (eloop.readers == NULL || eloop.reader_count == 0)
105 for (i = 0; i < eloop.reader_count; i++) {
106 if (eloop.readers[i].sock == sock)
109 if (i == eloop.reader_count)
111 if (i != eloop.reader_count - 1) {
112 memmove(&eloop.readers[i], &eloop.readers[i + 1],
113 (eloop.reader_count - i - 1) *
114 sizeof(struct eloop_sock));
116 eloop.reader_count--;
117 eloop.reader_table_changed = 1;
121 int eloop_register_timeout(unsigned int secs, unsigned int usecs,
122 void (*handler)(void *eloop_ctx, void *timeout_ctx),
123 void *eloop_data, void *user_data)
125 struct eloop_timeout *timeout, *tmp, *prev;
127 timeout = (struct eloop_timeout *) malloc(sizeof(*timeout));
130 os_get_time(&timeout->time);
131 timeout->time.sec += secs;
132 timeout->time.usec += usecs;
133 while (timeout->time.usec >= 1000000) {
135 timeout->time.usec -= 1000000;
137 timeout->eloop_data = eloop_data;
138 timeout->user_data = user_data;
139 timeout->handler = handler;
140 timeout->next = NULL;
142 if (eloop.timeout == NULL) {
143 eloop.timeout = timeout;
149 while (tmp != NULL) {
150 if (os_time_before(&timeout->time, &tmp->time))
157 timeout->next = eloop.timeout;
158 eloop.timeout = timeout;
160 timeout->next = prev->next;
161 prev->next = timeout;
168 int eloop_cancel_timeout(void (*handler)(void *eloop_ctx, void *sock_ctx),
169 void *eloop_data, void *user_data)
171 struct eloop_timeout *timeout, *prev, *next;
175 timeout = eloop.timeout;
176 while (timeout != NULL) {
177 next = timeout->next;
179 if (timeout->handler == handler &&
180 (timeout->eloop_data == eloop_data ||
181 eloop_data == ELOOP_ALL_CTX) &&
182 (timeout->user_data == user_data ||
183 user_data == ELOOP_ALL_CTX)) {
185 eloop.timeout = next;
200 int eloop_is_timeout_registered(void (*handler)(void *eloop_ctx,
202 void *eloop_data, void *user_data)
204 struct eloop_timeout *tmp;
207 while (tmp != NULL) {
208 if (tmp->handler == handler &&
209 tmp->eloop_data == eloop_data &&
210 tmp->user_data == user_data)
220 /* TODO: replace with suitable signal handler */
222 static void eloop_handle_signal(int sig)
227 for (i = 0; i < eloop.signal_count; i++) {
228 if (eloop.signals[i].sig == sig) {
229 eloop.signals[i].signaled++;
237 static void eloop_process_pending_signals(void)
241 if (eloop.signaled == 0)
245 if (eloop.pending_terminate) {
246 eloop.pending_terminate = 0;
249 for (i = 0; i < eloop.signal_count; i++) {
250 if (eloop.signals[i].signaled) {
251 eloop.signals[i].signaled = 0;
252 eloop.signals[i].handler(eloop.signals[i].sig,
254 eloop.signals[i].user_data);
260 int eloop_register_signal(int sig,
261 void (*handler)(int sig, void *eloop_ctx,
265 struct eloop_signal *tmp;
267 tmp = (struct eloop_signal *)
268 realloc(eloop.signals,
269 (eloop.signal_count + 1) *
270 sizeof(struct eloop_signal));
274 tmp[eloop.signal_count].sig = sig;
275 tmp[eloop.signal_count].user_data = user_data;
276 tmp[eloop.signal_count].handler = handler;
277 tmp[eloop.signal_count].signaled = 0;
278 eloop.signal_count++;
281 /* TODO: register signal handler */
287 int eloop_register_signal_terminate(void (*handler)(int sig, void *eloop_ctx,
292 /* TODO: for example */
293 int ret = eloop_register_signal(SIGINT, handler, user_data);
295 ret = eloop_register_signal(SIGTERM, handler, user_data);
302 int eloop_register_signal_reconfig(void (*handler)(int sig, void *eloop_ctx,
307 /* TODO: for example */
308 return eloop_register_signal(SIGHUP, handler, user_data);
317 struct os_time tv, now;
319 while (!eloop.terminate &&
320 (eloop.timeout || eloop.reader_count > 0)) {
323 if (os_time_before(&now, &eloop.timeout->time))
324 os_time_sub(&eloop.timeout->time, &now, &tv);
326 tv.sec = tv.usec = 0;
330 * TODO: wait for any event (read socket ready, timeout (tv),
333 os_sleep(1, 0); /* just a dummy wait for testing */
335 eloop_process_pending_signals();
337 /* check if some registered timeouts have occurred */
339 struct eloop_timeout *tmp;
342 if (!os_time_before(&now, &eloop.timeout->time)) {
344 eloop.timeout = eloop.timeout->next;
345 tmp->handler(tmp->eloop_data,
352 eloop.reader_table_changed = 0;
353 for (i = 0; i < eloop.reader_count; i++) {
355 * TODO: call each handler that has pending data to
358 if (0 /* TODO: eloop.readers[i].sock ready */) {
359 eloop.readers[i].handler(
360 eloop.readers[i].sock,
361 eloop.readers[i].eloop_data,
362 eloop.readers[i].user_data);
363 if (eloop.reader_table_changed)
371 void eloop_terminate(void)
377 void eloop_destroy(void)
379 struct eloop_timeout *timeout, *prev;
381 timeout = eloop.timeout;
382 while (timeout != NULL) {
384 timeout = timeout->next;
392 int eloop_terminated(void)
394 return eloop.terminate;
398 void eloop_wait_for_read_sock(int sock)
401 * TODO: wait for the file descriptor to have something available for
407 void * eloop_get_user_data(void)
409 return eloop.user_data;