tweak lua gc

lua C++ bindings require ~400KB worth of tables now; so bump memory
available to rt-safe scripts (full interpreter) to 2MB.

Also switch to incremental GC.

2 files changed, 13 insertions, 0 deletions

diff --git a/libs/lua/lua/luastate.h b/libs/lua/lua/luastate.h
index 88ffc93486..5a5c939c2a 100644
--- a/libs/lua/lua/luastate.h
+++ b/libs/lua/lua/luastate.h
@@ -34,6 +34,8 @@ public:
 	int do_command (std::string);
 	int do_file (std::string);
 	void collect_garbage ();
+	void collect_garbage_step ();
+	void tweak_rt_gc ();
 
 	sigc::signal<void,std::string> Print;
 
diff --git a/libs/lua/luastate.cc b/libs/lua/luastate.cc
index 546b02a006..3b8a7ae25a 100644
--- a/libs/lua/luastate.cc
+++ b/libs/lua/luastate.cc
@@ -77,6 +77,17 @@ LuaState::collect_garbage () {
 }
 
 void
+LuaState::collect_garbage_step () {
+	lua_gc (L, LUA_GCSTEP, 0);
+}
+
+void
+LuaState::tweak_rt_gc () {
+	//lua_gc (L, LUA_GCSETPAUSE, 20);
+	lua_gc (L, LUA_GCSETSTEPMUL, 100);
+}
+
+void
 LuaState::print (std::string text) {
 	Print (text); /* EMIT SIGNAL */
 }