Lua Add Emergency Garbage Collector

Derivative of work by RobertGabrielJakabosky
 http://lua-users.org/wiki/EmergencyGarbageCollector

I've only implemented the not enough memory part and
 expanded this idea to adding a mechanism to signal
 the OOM condition of the plugin buffer which allows us to only
 grab the playback buffer after garbage collection fails
 (SO THE MUSIC KEEPS PLAYING AS LONG AS POSSIBLE)

Change-Id: I684fb98b540ffc01f7ba324ab5b761ceb59b9f9b

1 files changed, 3 insertions, 1 deletions

diff --git a/apps/plugins/lua/tlsf_helper.c b/apps/plugins/lua/tlsf_helper.c
index edf32eecf9..097d39c8e4 100644
--- a/apps/plugins/lua/tlsf_helper.c
+++ b/apps/plugins/lua/tlsf_helper.c
@@ -20,6 +20,7 @@
 
 #include "plugin.h"
 #include <tlsf.h>
+#include "lua.h"
 
 void *get_new_area(size_t *size)
 {
@@ -36,7 +37,8 @@ void *get_new_area(size_t *size)
         return pluginbuf_ptr;
     }
 
-    if (audiobuf_ptr == NULL)
+    /* only grab the next area if lua already tried + failed to garbage collect*/
+    if (audiobuf_ptr == NULL && (get_lua_OOM())->count > 0)
     {
         /* grab audiobuffer */
         audiobuf_ptr = rb->plugin_get_audio_buffer(size);