1 files changed, 95 insertions, 0 deletions
diff --git a/res/stasis/command.c b/res/stasis/command.c
new file mode 100644
index 000000000..f1f7f8f3b
--- /dev/null
+++ b/res/stasis/command.c
@@ -0,0 +1,95 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013, Digium, Inc.
+ *
+ * David M. Lee, II <dlee@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 Stasis application command support.
+ *
+ * \author David M. Lee, II <dlee@digium.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "command.h"
+
+#include "asterisk/lock.h"
+#include "asterisk/stasis_app_impl.h"
+
+struct stasis_app_command {
+	ast_mutex_t lock;
+	ast_cond_t condition;
+	stasis_app_command_cb callback;
+	void *data;
+	void *retval;
+	int is_done:1;
+};
+
+static void command_dtor(void *obj)
+{
+	struct stasis_app_command *command = obj;
+	ast_mutex_destroy(&command->lock);
+	ast_cond_destroy(&command->condition);
+}
+
+struct stasis_app_command *command_create(
+	stasis_app_command_cb callback, void *data)
+{
+	RAII_VAR(struct stasis_app_command *, command, NULL, ao2_cleanup);
+
+	command = ao2_alloc(sizeof(*command), command_dtor);
+	if (!command) {
+		return NULL;
+	}
+
+	ast_mutex_init(&command->lock);
+	ast_cond_init(&command->condition, 0);
+	command->callback = callback;
+	command->data = data;
+
+	ao2_ref(command, +1);
+	return command;
+}
+
+static void command_complete(struct stasis_app_command *command, void *retval)
+{
+	SCOPED_MUTEX(lock, &command->lock);
+
+	command->is_done = 1;
+	command->retval = retval;
+	ast_cond_signal(&command->condition);
+}
+
+void *command_join(struct stasis_app_command *command)
+{
+	SCOPED_MUTEX(lock, &command->lock);
+	while (!command->is_done) {
+		ast_cond_wait(&command->condition, &command->lock);
+	}
+
+	return command->retval;
+}
+
+void command_invoke(struct stasis_app_command *command,
+	struct stasis_app_control *control, struct ast_channel *chan)
+{
+	void *retval = command->callback(control, chan, command->data);
+	command_complete(command, retval);
+}
+