/*
* Event loop based on Windows events and WaitForMultipleObjects
- * Copyright (c) 2002-2006, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "includes.h"
#include <winsock2.h>
#include "common.h"
+#include "list.h"
#include "eloop.h"
};
struct eloop_timeout {
- struct os_time time;
+ struct dl_list list;
+ struct os_reltime time;
void *eloop_data;
void *user_data;
eloop_timeout_handler handler;
- struct eloop_timeout *next;
};
struct eloop_signal {
size_t event_count;
struct eloop_event *events;
- struct eloop_timeout *timeout;
+ struct dl_list timeout;
int signal_count;
struct eloop_signal *signals;
int eloop_init(void)
{
os_memset(&eloop, 0, sizeof(eloop));
+ dl_list_init(&eloop.timeout);
eloop.num_handles = 1;
eloop.handles = os_malloc(eloop.num_handles *
sizeof(eloop.handles[0]));
if (eloop.num_handles > eloop.reader_count + eloop.event_count + 8)
return 0;
- n = os_realloc(eloop.handles,
- eloop.num_handles * 2 * sizeof(eloop.handles[0]));
+ n = os_realloc_array(eloop.handles, eloop.num_handles * 2,
+ sizeof(eloop.handles[0]));
if (n == NULL)
return -1;
eloop.handles = n;
WSACloseEvent(event);
return -1;
}
- tmp = os_realloc(eloop.readers,
- (eloop.reader_count + 1) * sizeof(struct eloop_sock));
+ tmp = os_realloc_array(eloop.readers, eloop.reader_count + 1,
+ sizeof(struct eloop_sock));
if (tmp == NULL) {
WSAEventSelect(sock, event, 0);
WSACloseEvent(event);
if (eloop_prepare_handles())
return -1;
- tmp = os_realloc(eloop.events,
- (eloop.event_count + 1) * sizeof(struct eloop_event));
+ tmp = os_realloc_array(eloop.events, eloop.event_count + 1,
+ sizeof(struct eloop_event));
if (tmp == NULL)
return -1;
eloop_timeout_handler handler,
void *eloop_data, void *user_data)
{
- struct eloop_timeout *timeout, *tmp, *prev;
+ struct eloop_timeout *timeout, *tmp;
+ os_time_t now_sec;
- timeout = os_malloc(sizeof(*timeout));
+ timeout = os_zalloc(sizeof(*timeout));
if (timeout == NULL)
return -1;
- os_get_time(&timeout->time);
+ if (os_get_reltime(&timeout->time) < 0) {
+ os_free(timeout);
+ return -1;
+ }
+ now_sec = timeout->time.sec;
timeout->time.sec += secs;
+ if (timeout->time.sec < now_sec) {
+ /*
+ * Integer overflow - assume long enough timeout to be assumed
+ * to be infinite, i.e., the timeout would never happen.
+ */
+ wpa_printf(MSG_DEBUG, "ELOOP: Too long timeout (secs=%u) to "
+ "ever happen - ignore it", secs);
+ os_free(timeout);
+ return 0;
+ }
timeout->time.usec += usecs;
while (timeout->time.usec >= 1000000) {
timeout->time.sec++;
timeout->eloop_data = eloop_data;
timeout->user_data = user_data;
timeout->handler = handler;
- timeout->next = NULL;
- if (eloop.timeout == NULL) {
- eloop.timeout = timeout;
- return 0;
+ /* Maintain timeouts in order of increasing time */
+ dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
+ if (os_reltime_before(&timeout->time, &tmp->time)) {
+ dl_list_add(tmp->list.prev, &timeout->list);
+ return 0;
+ }
}
+ dl_list_add_tail(&eloop.timeout, &timeout->list);
- prev = NULL;
- tmp = eloop.timeout;
- while (tmp != NULL) {
- if (os_time_before(&timeout->time, &tmp->time))
- break;
- prev = tmp;
- tmp = tmp->next;
- }
+ return 0;
+}
- if (prev == NULL) {
- timeout->next = eloop.timeout;
- eloop.timeout = timeout;
- } else {
- timeout->next = prev->next;
- prev->next = timeout;
- }
- return 0;
+static void eloop_remove_timeout(struct eloop_timeout *timeout)
+{
+ dl_list_del(&timeout->list);
+ os_free(timeout);
}
int eloop_cancel_timeout(eloop_timeout_handler handler,
void *eloop_data, void *user_data)
{
- struct eloop_timeout *timeout, *prev, *next;
+ struct eloop_timeout *timeout, *prev;
int removed = 0;
- prev = NULL;
- timeout = eloop.timeout;
- while (timeout != NULL) {
- next = timeout->next;
-
+ dl_list_for_each_safe(timeout, prev, &eloop.timeout,
+ struct eloop_timeout, list) {
if (timeout->handler == handler &&
(timeout->eloop_data == eloop_data ||
eloop_data == ELOOP_ALL_CTX) &&
(timeout->user_data == user_data ||
user_data == ELOOP_ALL_CTX)) {
- if (prev == NULL)
- eloop.timeout = next;
- else
- prev->next = next;
- os_free(timeout);
+ eloop_remove_timeout(timeout);
removed++;
- } else
- prev = timeout;
-
- timeout = next;
+ }
}
return removed;
}
+int eloop_cancel_timeout_one(eloop_timeout_handler handler,
+ void *eloop_data, void *user_data,
+ struct os_reltime *remaining)
+{
+ struct eloop_timeout *timeout, *prev;
+ int removed = 0;
+ struct os_reltime now;
+
+ os_get_reltime(&now);
+ remaining->sec = remaining->usec = 0;
+
+ dl_list_for_each_safe(timeout, prev, &eloop.timeout,
+ struct eloop_timeout, list) {
+ if (timeout->handler == handler &&
+ (timeout->eloop_data == eloop_data) &&
+ (timeout->user_data == user_data)) {
+ removed = 1;
+ if (os_reltime_before(&now, &timeout->time))
+ os_reltime_sub(&timeout->time, &now, remaining);
+ eloop_remove_timeout(timeout);
+ break;
+ }
+ }
+ return removed;
+}
+
+
int eloop_is_timeout_registered(eloop_timeout_handler handler,
void *eloop_data, void *user_data)
{
struct eloop_timeout *tmp;
- tmp = eloop.timeout;
- while (tmp != NULL) {
+ dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
if (tmp->handler == handler &&
tmp->eloop_data == eloop_data &&
tmp->user_data == user_data)
return 1;
-
- tmp = tmp->next;
}
return 0;
}
+int eloop_deplete_timeout(unsigned int req_secs, unsigned int req_usecs,
+ eloop_timeout_handler handler, void *eloop_data,
+ void *user_data)
+{
+ struct os_reltime now, requested, remaining;
+ struct eloop_timeout *tmp;
+
+ dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
+ if (tmp->handler == handler &&
+ tmp->eloop_data == eloop_data &&
+ tmp->user_data == user_data) {
+ requested.sec = req_secs;
+ requested.usec = req_usecs;
+ os_get_reltime(&now);
+ os_reltime_sub(&tmp->time, &now, &remaining);
+ if (os_reltime_before(&requested, &remaining)) {
+ eloop_cancel_timeout(handler, eloop_data,
+ user_data);
+ eloop_register_timeout(requested.sec,
+ requested.usec,
+ handler, eloop_data,
+ user_data);
+ return 1;
+ }
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+
+int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs,
+ eloop_timeout_handler handler, void *eloop_data,
+ void *user_data)
+{
+ struct os_reltime now, requested, remaining;
+ struct eloop_timeout *tmp;
+
+ dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
+ if (tmp->handler == handler &&
+ tmp->eloop_data == eloop_data &&
+ tmp->user_data == user_data) {
+ requested.sec = req_secs;
+ requested.usec = req_usecs;
+ os_get_reltime(&now);
+ os_reltime_sub(&tmp->time, &now, &remaining);
+ if (os_reltime_before(&remaining, &requested)) {
+ eloop_cancel_timeout(handler, eloop_data,
+ user_data);
+ eloop_register_timeout(requested.sec,
+ requested.usec,
+ handler, eloop_data,
+ user_data);
+ return 1;
+ }
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+
/* TODO: replace with suitable signal handler */
#if 0
static void eloop_handle_signal(int sig)
{
struct eloop_signal *tmp;
- tmp = os_realloc(eloop.signals,
- (eloop.signal_count + 1) *
- sizeof(struct eloop_signal));
+ tmp = os_realloc_array(eloop.signals, eloop.signal_count + 1,
+ sizeof(struct eloop_signal));
if (tmp == NULL)
return -1;
void eloop_run(void)
{
- struct os_time tv, now;
- DWORD count, ret, timeout, err;
+ struct os_reltime tv, now;
+ DWORD count, ret, timeout_val, err;
size_t i;
while (!eloop.terminate &&
- (eloop.timeout || eloop.reader_count > 0 ||
+ (!dl_list_empty(&eloop.timeout) || eloop.reader_count > 0 ||
eloop.event_count > 0)) {
+ struct eloop_timeout *timeout;
tv.sec = tv.usec = 0;
- if (eloop.timeout) {
- os_get_time(&now);
- if (os_time_before(&now, &eloop.timeout->time))
- os_time_sub(&eloop.timeout->time, &now, &tv);
+ timeout = dl_list_first(&eloop.timeout, struct eloop_timeout,
+ list);
+ if (timeout) {
+ os_get_reltime(&now);
+ if (os_reltime_before(&now, &timeout->time))
+ os_reltime_sub(&timeout->time, &now, &tv);
}
count = 0;
if (eloop.term_event)
eloop.handles[count++] = eloop.term_event;
- if (eloop.timeout)
- timeout = tv.sec * 1000 + tv.usec / 1000;
+ if (timeout)
+ timeout_val = tv.sec * 1000 + tv.usec / 1000;
else
- timeout = INFINITE;
+ timeout_val = INFINITE;
if (count > MAXIMUM_WAIT_OBJECTS) {
printf("WaitForMultipleObjects: Too many events: "
}
#ifdef _WIN32_WCE
ret = WaitForMultipleObjects(count, eloop.handles, FALSE,
- timeout);
+ timeout_val);
#else /* _WIN32_WCE */
ret = WaitForMultipleObjectsEx(count, eloop.handles, FALSE,
- timeout, TRUE);
+ timeout_val, TRUE);
#endif /* _WIN32_WCE */
err = GetLastError();
eloop_process_pending_signals();
/* check if some registered timeouts have occurred */
- if (eloop.timeout) {
- struct eloop_timeout *tmp;
-
- os_get_time(&now);
- if (!os_time_before(&now, &eloop.timeout->time)) {
- tmp = eloop.timeout;
- eloop.timeout = eloop.timeout->next;
- tmp->handler(tmp->eloop_data,
- tmp->user_data);
- os_free(tmp);
+ timeout = dl_list_first(&eloop.timeout, struct eloop_timeout,
+ list);
+ if (timeout) {
+ os_get_reltime(&now);
+ if (!os_reltime_before(&now, &timeout->time)) {
+ void *eloop_data = timeout->eloop_data;
+ void *user_data = timeout->user_data;
+ eloop_timeout_handler handler =
+ timeout->handler;
+ eloop_remove_timeout(timeout);
+ handler(eloop_data, user_data);
}
}
{
struct eloop_timeout *timeout, *prev;
- timeout = eloop.timeout;
- while (timeout != NULL) {
- prev = timeout;
- timeout = timeout->next;
- os_free(prev);
+ dl_list_for_each_safe(timeout, prev, &eloop.timeout,
+ struct eloop_timeout, list) {
+ eloop_remove_timeout(timeout);
}
os_free(eloop.readers);
os_free(eloop.signals);
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