1 files changed, 94 insertions, 0 deletions
diff --git a/main/autochan.c b/main/autochan.c
new file mode 100644
index 000000000..4ad65a371
--- /dev/null
+++ b/main/autochan.c
@@ -0,0 +1,94 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2009, Digium, Inc.
+ *
+ * Mark Michelson <mmichelson@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 "smart" channels
+ *
+ * \author Mark Michelson <mmichelson@digium.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/autochan.h"
+#include "asterisk/utils.h"
+#include "asterisk/linkedlists.h"
+#include "asterisk/options.h"
+#include "asterisk/channel.h"
+
+struct ast_autochan *ast_autochan_setup(struct ast_channel *chan)
+{
+	struct ast_autochan *autochan;
+
+	if (!chan) {
+		return NULL;
+	}
+
+	if (!(autochan = ast_calloc(1, sizeof(*autochan)))) {
+		return NULL;
+	}
+
+	autochan->chan = ast_channel_ref(chan);
+
+	ast_channel_lock(autochan->chan);
+	AST_LIST_INSERT_TAIL(&autochan->chan->autochans, autochan, list);
+	ast_channel_unlock(autochan->chan);
+
+	ast_debug(1, "Created autochan %p to hold channel %s (%p)\n", autochan, chan->name, chan);
+
+	return autochan;
+}
+
+void ast_autochan_destroy(struct ast_autochan *autochan)
+{
+	struct ast_autochan *autochan_iter;
+
+	ast_channel_lock(autochan->chan);
+	AST_LIST_TRAVERSE_SAFE_BEGIN(&autochan->chan->autochans, autochan_iter, list) {
+		if (autochan_iter == autochan) {
+			AST_LIST_REMOVE_CURRENT(list);
+			ast_debug(1, "Removed autochan %p from the list, about to free it\n", autochan);
+			break;
+		}
+	}
+	AST_LIST_TRAVERSE_SAFE_END;
+	ast_channel_unlock(autochan->chan);
+
+	autochan->chan = ast_channel_unref(autochan->chan);
+
+	ast_free(autochan);
+}
+
+void ast_autochan_new_channel(struct ast_channel *old_chan, struct ast_channel *new_chan)
+{
+	struct ast_autochan *autochan;
+
+	AST_LIST_APPEND_LIST(&new_chan->autochans, &old_chan->autochans, list);
+
+	AST_LIST_TRAVERSE(&new_chan->autochans, autochan, list) {
+		if (autochan->chan == old_chan) {
+			autochan->chan = ast_channel_unref(old_chan);
+			autochan->chan = ast_channel_ref(new_chan);
+
+			ast_debug(1, "Autochan %p used to hold channel %s (%p) but now holds channel %s (%p)\n",
+					autochan, old_chan->name, old_chan, new_chan->name, new_chan);
+		}
+	}
+}