hostap/src/utils/eloop_none.c
Jouni Malinen 0456ea16d8 eloop: Remove global user data pointer
This is not really needed since all signal handlers can use a context
pointer provided during signal handler registration.
2009-12-19 19:22:16 +02:00

401 lines
7.8 KiB
C

/*
* Event loop - empty template (basic structure, but no OS specific operations)
* Copyright (c) 2002-2005, 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.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
struct eloop_sock {
int sock;
void *eloop_data;
void *user_data;
void (*handler)(int sock, void *eloop_ctx, void *sock_ctx);
};
struct eloop_timeout {
struct os_time time;
void *eloop_data;
void *user_data;
void (*handler)(void *eloop_ctx, void *sock_ctx);
struct eloop_timeout *next;
};
struct eloop_signal {
int sig;
void *user_data;
void (*handler)(int sig, void *eloop_ctx, void *signal_ctx);
int signaled;
};
struct eloop_data {
int max_sock, reader_count;
struct eloop_sock *readers;
struct eloop_timeout *timeout;
int signal_count;
struct eloop_signal *signals;
int signaled;
int pending_terminate;
int terminate;
int reader_table_changed;
};
static struct eloop_data eloop;
int eloop_init(void)
{
memset(&eloop, 0, sizeof(eloop));
return 0;
}
int eloop_register_read_sock(int sock,
void (*handler)(int sock, void *eloop_ctx,
void *sock_ctx),
void *eloop_data, void *user_data)
{
struct eloop_sock *tmp;
tmp = (struct eloop_sock *)
realloc(eloop.readers,
(eloop.reader_count + 1) * sizeof(struct eloop_sock));
if (tmp == NULL)
return -1;
tmp[eloop.reader_count].sock = sock;
tmp[eloop.reader_count].eloop_data = eloop_data;
tmp[eloop.reader_count].user_data = user_data;
tmp[eloop.reader_count].handler = handler;
eloop.reader_count++;
eloop.readers = tmp;
if (sock > eloop.max_sock)
eloop.max_sock = sock;
eloop.reader_table_changed = 1;
return 0;
}
void eloop_unregister_read_sock(int sock)
{
int i;
if (eloop.readers == NULL || eloop.reader_count == 0)
return;
for (i = 0; i < eloop.reader_count; i++) {
if (eloop.readers[i].sock == sock)
break;
}
if (i == eloop.reader_count)
return;
if (i != eloop.reader_count - 1) {
memmove(&eloop.readers[i], &eloop.readers[i + 1],
(eloop.reader_count - i - 1) *
sizeof(struct eloop_sock));
}
eloop.reader_count--;
eloop.reader_table_changed = 1;
}
int eloop_register_timeout(unsigned int secs, unsigned int usecs,
void (*handler)(void *eloop_ctx, void *timeout_ctx),
void *eloop_data, void *user_data)
{
struct eloop_timeout *timeout, *tmp, *prev;
timeout = (struct eloop_timeout *) malloc(sizeof(*timeout));
if (timeout == NULL)
return -1;
os_get_time(&timeout->time);
timeout->time.sec += secs;
timeout->time.usec += usecs;
while (timeout->time.usec >= 1000000) {
timeout->time.sec++;
timeout->time.usec -= 1000000;
}
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;
}
prev = NULL;
tmp = eloop.timeout;
while (tmp != NULL) {
if (os_time_before(&timeout->time, &tmp->time))
break;
prev = tmp;
tmp = tmp->next;
}
if (prev == NULL) {
timeout->next = eloop.timeout;
eloop.timeout = timeout;
} else {
timeout->next = prev->next;
prev->next = timeout;
}
return 0;
}
int eloop_cancel_timeout(void (*handler)(void *eloop_ctx, void *sock_ctx),
void *eloop_data, void *user_data)
{
struct eloop_timeout *timeout, *prev, *next;
int removed = 0;
prev = NULL;
timeout = eloop.timeout;
while (timeout != NULL) {
next = timeout->next;
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;
free(timeout);
removed++;
} else
prev = timeout;
timeout = next;
}
return removed;
}
int eloop_is_timeout_registered(void (*handler)(void *eloop_ctx,
void *timeout_ctx),
void *eloop_data, void *user_data)
{
struct eloop_timeout *tmp;
tmp = eloop.timeout;
while (tmp != NULL) {
if (tmp->handler == handler &&
tmp->eloop_data == eloop_data &&
tmp->user_data == user_data)
return 1;
tmp = tmp->next;
}
return 0;
}
/* TODO: replace with suitable signal handler */
#if 0
static void eloop_handle_signal(int sig)
{
int i;
eloop.signaled++;
for (i = 0; i < eloop.signal_count; i++) {
if (eloop.signals[i].sig == sig) {
eloop.signals[i].signaled++;
break;
}
}
}
#endif
static void eloop_process_pending_signals(void)
{
int i;
if (eloop.signaled == 0)
return;
eloop.signaled = 0;
if (eloop.pending_terminate) {
eloop.pending_terminate = 0;
}
for (i = 0; i < eloop.signal_count; i++) {
if (eloop.signals[i].signaled) {
eloop.signals[i].signaled = 0;
eloop.signals[i].handler(eloop.signals[i].sig,
eloop.user_data,
eloop.signals[i].user_data);
}
}
}
int eloop_register_signal(int sig,
void (*handler)(int sig, void *eloop_ctx,
void *signal_ctx),
void *user_data)
{
struct eloop_signal *tmp;
tmp = (struct eloop_signal *)
realloc(eloop.signals,
(eloop.signal_count + 1) *
sizeof(struct eloop_signal));
if (tmp == NULL)
return -1;
tmp[eloop.signal_count].sig = sig;
tmp[eloop.signal_count].user_data = user_data;
tmp[eloop.signal_count].handler = handler;
tmp[eloop.signal_count].signaled = 0;
eloop.signal_count++;
eloop.signals = tmp;
/* TODO: register signal handler */
return 0;
}
int eloop_register_signal_terminate(void (*handler)(int sig, void *eloop_ctx,
void *signal_ctx),
void *user_data)
{
#if 0
/* TODO: for example */
int ret = eloop_register_signal(SIGINT, handler, user_data);
if (ret == 0)
ret = eloop_register_signal(SIGTERM, handler, user_data);
return ret;
#endif
return 0;
}
int eloop_register_signal_reconfig(void (*handler)(int sig, void *eloop_ctx,
void *signal_ctx),
void *user_data)
{
#if 0
/* TODO: for example */
return eloop_register_signal(SIGHUP, handler, user_data);
#endif
return 0;
}
void eloop_run(void)
{
int i;
struct os_time tv, now;
while (!eloop.terminate &&
(eloop.timeout || eloop.reader_count > 0)) {
if (eloop.timeout) {
os_get_time(&now);
if (os_time_before(&now, &eloop.timeout->time))
os_time_sub(&eloop.timeout->time, &now, &tv);
else
tv.sec = tv.usec = 0;
}
/*
* TODO: wait for any event (read socket ready, timeout (tv),
* signal
*/
os_sleep(1, 0); /* just a dummy wait for testing */
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);
free(tmp);
}
}
eloop.reader_table_changed = 0;
for (i = 0; i < eloop.reader_count; i++) {
/*
* TODO: call each handler that has pending data to
* read
*/
if (0 /* TODO: eloop.readers[i].sock ready */) {
eloop.readers[i].handler(
eloop.readers[i].sock,
eloop.readers[i].eloop_data,
eloop.readers[i].user_data);
if (eloop.reader_table_changed)
break;
}
}
}
}
void eloop_terminate(void)
{
eloop.terminate = 1;
}
void eloop_destroy(void)
{
struct eloop_timeout *timeout, *prev;
timeout = eloop.timeout;
while (timeout != NULL) {
prev = timeout;
timeout = timeout->next;
free(prev);
}
free(eloop.readers);
free(eloop.signals);
}
int eloop_terminated(void)
{
return eloop.terminate;
}
void eloop_wait_for_read_sock(int sock)
{
/*
* TODO: wait for the file descriptor to have something available for
* reading
*/
}