From 0a27d8bfe5fa36d8cb600b5b520f9b5c7fbf0ed6 Mon Sep 17 00:00:00 2001
From: "Kevin P. Fleming" <kpfleming@digium.com>
Date: Mon, 21 Aug 2006 02:11:39 +0000
Subject: merge new_loader_completion branch, including (at least):   -
 restructured build tree and makefiles to eliminate recursion problems   -
 support for embedded modules   - support for static builds   - simpler
 cross-compilation support   - simpler module/loader interface (no exported
 symbols)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@40722 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 main/autoservice.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 main/autoservice.c

(limited to 'main/autoservice.c')

diff --git a/main/autoservice.c b/main/autoservice.c
new file mode 100644
index 000000000..51a1e1ca6
--- /dev/null
+++ b/main/autoservice.c
@@ -0,0 +1,154 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2006, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Automatic channel service routines
+ *
+ * \author Mark Spencer <markster@digium.com> 
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "asterisk/pbx.h"
+#include "asterisk/frame.h"
+#include "asterisk/sched.h"
+#include "asterisk/options.h"
+#include "asterisk/channel.h"
+#include "asterisk/logger.h"
+#include "asterisk/file.h"
+#include "asterisk/translate.h"
+#include "asterisk/manager.h"
+#include "asterisk/chanvars.h"
+#include "asterisk/linkedlists.h"
+#include "asterisk/indications.h"
+#include "asterisk/lock.h"
+#include "asterisk/utils.h"
+
+#define MAX_AUTOMONS 256
+
+struct asent {
+	struct ast_channel *chan;
+	AST_LIST_ENTRY(asent) list;
+};
+
+static AST_LIST_HEAD_STATIC(aslist, asent);
+
+static pthread_t asthread = AST_PTHREADT_NULL;
+
+static void *autoservice_run(void *ign)
+{
+
+	for(;;) {
+		struct ast_channel *mons[MAX_AUTOMONS];
+		struct ast_channel *chan;
+		struct asent *as;
+		int x = 0, ms = 500;
+
+		AST_LIST_LOCK(&aslist);
+		AST_LIST_TRAVERSE(&aslist, as, list) {
+			if (!as->chan->_softhangup) {
+				if (x < MAX_AUTOMONS)
+					mons[x++] = as->chan;
+				else
+					ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events.  Fix autoservice.c\n");
+			}
+		}
+		AST_LIST_UNLOCK(&aslist);
+
+		chan = ast_waitfor_n(mons, x, &ms);
+		if (chan) {
+			/* Read and ignore anything that occurs */
+			struct ast_frame *f = ast_read(chan);
+			if (f)
+				ast_frfree(f);
+		}
+	}
+	asthread = AST_PTHREADT_NULL;
+	return NULL;
+}
+
+int ast_autoservice_start(struct ast_channel *chan)
+{
+	int res = -1;
+	struct asent *as;
+	AST_LIST_LOCK(&aslist);
+
+	/* Check if the channel already has autoservice */
+	AST_LIST_TRAVERSE(&aslist, as, list) {
+		if (as->chan == chan)
+			break;
+	}
+
+	/* If not, start autoservice on channel */
+	if (!as && (as = ast_calloc(1, sizeof(*as)))) {
+		as->chan = chan;
+		AST_LIST_INSERT_HEAD(&aslist, as, list);
+		res = 0;
+		if (asthread == AST_PTHREADT_NULL) { /* need start the thread */
+			if (ast_pthread_create(&asthread, NULL, autoservice_run, NULL)) {
+				ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n");
+				/* There will only be a single member in the list at this point,
+				   the one we just added. */
+				AST_LIST_REMOVE(&aslist, as, list);
+				free(as);
+				res = -1;
+			} else
+				pthread_kill(asthread, SIGURG);
+		}
+	}
+	AST_LIST_UNLOCK(&aslist);
+	return res;
+}
+
+int ast_autoservice_stop(struct ast_channel *chan)
+{
+	int res = -1;
+	struct asent *as;
+
+	AST_LIST_LOCK(&aslist);
+	AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) {	
+		if (as->chan == chan) {
+			AST_LIST_REMOVE_CURRENT(&aslist, list);
+			free(as);
+			if (!chan->_softhangup)
+				res = 0;
+			break;
+		}
+	}
+	AST_LIST_TRAVERSE_SAFE_END
+
+	if (asthread != AST_PTHREADT_NULL) 
+		pthread_kill(asthread, SIGURG);
+	AST_LIST_UNLOCK(&aslist);
+
+	/* Wait for it to un-block */
+	while(ast_test_flag(chan, AST_FLAG_BLOCKING))
+		usleep(1000);
+	return res;
+}
-- 
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