166 lines
3.7 KiB
C
166 lines
3.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Automatic channel service routines
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*
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* \author Mark Spencer <markster@digium.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <errno.h>
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#include <unistd.h>
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#include <math.h> /* For PI */
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/pbx.h"
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#include "asterisk/frame.h"
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#include "asterisk/sched.h"
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#include "asterisk/options.h"
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#include "asterisk/channel.h"
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#include "asterisk/logger.h"
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#include "asterisk/file.h"
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#include "asterisk/translate.h"
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#include "asterisk/manager.h"
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#include "asterisk/chanvars.h"
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#include "asterisk/linkedlists.h"
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#include "asterisk/indications.h"
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#include "asterisk/lock.h"
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#include "asterisk/utils.h"
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#define MAX_AUTOMONS 256
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struct asent {
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struct ast_channel *chan;
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AST_LIST_ENTRY(asent) list;
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};
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static AST_LIST_HEAD_STATIC(aslist, asent);
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static pthread_t asthread = AST_PTHREADT_NULL;
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static void *autoservice_run(void *ign)
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{
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struct ast_channel *mons[MAX_AUTOMONS];
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int x;
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int ms;
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struct ast_channel *chan;
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struct asent *as;
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struct ast_frame *f;
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for(;;) {
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x = 0;
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AST_LIST_LOCK(&aslist);
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AST_LIST_TRAVERSE(&aslist, as, list) {
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if (!as->chan->_softhangup) {
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if (x < MAX_AUTOMONS)
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mons[x++] = as->chan;
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else
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ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n");
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}
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}
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AST_LIST_UNLOCK(&aslist);
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ms = 500;
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chan = ast_waitfor_n(mons, x, &ms);
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if (chan) {
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/* Read and ignore anything that occurs */
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f = ast_read(chan);
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if (f)
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ast_frfree(f);
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}
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}
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asthread = AST_PTHREADT_NULL;
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return NULL;
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}
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int ast_autoservice_start(struct ast_channel *chan)
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{
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int res = -1;
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struct asent *as;
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int needstart;
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AST_LIST_LOCK(&aslist);
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/* Check if autoservice thread is executing */
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needstart = (asthread == AST_PTHREADT_NULL) ? 1 : 0 ;
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/* Check if the channel already has autoservice */
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AST_LIST_TRAVERSE(&aslist, as, list) {
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if (as->chan == chan)
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break;
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}
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/* If not, start autoservice on channel */
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if (!as) {
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as = calloc(1, sizeof(struct asent));
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if (as) {
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as->chan = chan;
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AST_LIST_INSERT_HEAD(&aslist, as, list);
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res = 0;
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if (needstart) {
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if (ast_pthread_create(&asthread, NULL, autoservice_run, NULL)) {
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ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n");
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/* There will only be a single member in the list at this point,
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the one we just added. */
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AST_LIST_REMOVE(&aslist, as, list);
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free(as);
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res = -1;
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} else
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pthread_kill(asthread, SIGURG);
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}
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}
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}
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AST_LIST_UNLOCK(&aslist);
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return res;
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}
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int ast_autoservice_stop(struct ast_channel *chan)
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{
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int res = -1;
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struct asent *as;
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AST_LIST_LOCK(&aslist);
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AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) {
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if (as->chan == chan) {
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AST_LIST_REMOVE_CURRENT(&aslist, list);
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free(as);
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if (!chan->_softhangup)
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res = 0;
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break;
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}
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}
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AST_LIST_TRAVERSE_SAFE_END
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if (asthread != AST_PTHREADT_NULL)
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pthread_kill(asthread, SIGURG);
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AST_LIST_UNLOCK(&aslist);
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/* Wait for it to un-block */
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while(ast_test_flag(chan, AST_FLAG_BLOCKING))
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usleep(1000);
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return res;
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}
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