Make pbx_lua handle managing the autoservice better.

Make autoservice_start() and autoservice_stop() return nothing.  Also check if
the autoservice flag is set before starting or stopping the autoservice and
stop and start the autoservice when returning control to and getting control
from the pbx engine.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@317803 65c4cc65-6c06-0410-ace0-fbb531ad65f3

UPGRADE.txt

@@ -47,6 +47,7 @@ pbx_lua:
    (such as app.goto).  Now when an application such as app.goto() is called,
    control is returned back to the pbx engine and the current extension
    function stops executing.
+ - autoservice_start() and autoservice_start() no longer return a value.
 
 ===========================================================
 ===========================================================

pbx/pbx_lua.c

@@ -717,26 +717,28 @@ static int lua_func_read(lua_State *L)
  * This function will set a flag that will cause pbx_lua to maintain an
  * autoservice on this channel.  The autoservice will automatically be stopped
  * and restarted before calling applications and functions.
- *
- * \return This function returns the result of the ast_autoservice_start()
- * function as a boolean to its lua caller.
  */
 static int lua_autoservice_start(lua_State *L)
 {
 	struct ast_channel *chan;
-	int res;
+
+	lua_getfield(L, LUA_REGISTRYINDEX, "autoservice");
+	if (lua_toboolean(L, -1)) {
+		/* autservice already running */
+		lua_pop(L, 1);
+		return 0;
+	}
+	lua_pop(L, 1);
 
 	lua_getfield(L, LUA_REGISTRYINDEX, "channel");
 	chan = lua_touserdata(L, -1);
 	lua_pop(L, 1);
 
-	res = ast_autoservice_start(chan);
+	ast_autoservice_start(chan);
 
-	lua_pushboolean(L, !res);
+	lua_pushboolean(L, 1);
 	lua_setfield(L, LUA_REGISTRYINDEX, "autoservice");
-
-	lua_pushboolean(L, !res);
-	return 1;
+	return 0;
 }
 
 /*!
@@ -748,26 +750,28 @@ static int lua_autoservice_start(lua_State *L)
  * This function will stop any autoservice running and turn off the autoservice
  * flag.  If this function returns false, it's probably because no autoservice
  * was running to begin with.
- *
- * \return This function returns the result of the ast_autoservice_stop()
- * function as a boolean to its lua caller.
  */
 static int lua_autoservice_stop(lua_State *L)
 {
 	struct ast_channel *chan;
-	int res;
+
+	lua_getfield(L, LUA_REGISTRYINDEX, "autoservice");
+	if (!lua_toboolean(L, -1)) {
+		/* no autservice running */
+		lua_pop(L, 1);
+		return 0;
+	}
+	lua_pop(L, 1);
 
 	lua_getfield(L, LUA_REGISTRYINDEX, "channel");
 	chan = lua_touserdata(L, -1);
 	lua_pop(L, 1);
 
-	res = ast_autoservice_stop(chan);
+	ast_autoservice_stop(chan);
 
 	lua_pushboolean(L, 0);
 	lua_setfield(L, LUA_REGISTRYINDEX, "autoservice");
-
-	lua_pushboolean(L, !res);
-	return 1;
+	return 0;
 }
 
 /*!
@@ -1429,7 +1433,13 @@ static int exec(struct ast_channel *chan, const char *context, const char *exten
 		ast_module_user_remove(u);
 		return -1;
 	}
-		
+
+	lua_getfield(L, LUA_REGISTRYINDEX, "autoservice");
+	if (lua_toboolean(L, -1)) {
+		ast_autoservice_start(chan);
+	}
+	lua_pop(L, 1);
+
 	lua_update_registry(L, context, exten, priority);
 	
 	lua_pushstring(L, context);
@@ -1459,6 +1469,13 @@ static int exec(struct ast_channel *chan, const char *context, const char *exten
 		lua_pop(L, 1);
 	}
 	lua_remove(L, error_func);
+
+	lua_getfield(L, LUA_REGISTRYINDEX, "autoservice");
+	if (lua_toboolean(L, -1)) {
+		ast_autoservice_stop(chan);
+	}
+	lua_pop(L, 1);
+
 	if (!chan) lua_close(L);
 	ast_module_user_remove(u);
 	return res;