public static ILuaMeta GetLuaMeta(this IntPtr l, int index)
{
l.getfenv(index); // env
ILuaMeta mex = null;
if (l.istable(-1))
{
l.pushlightuserdata(LuaConst.LRKEY_OBJ_META_EX); // env mkey
l.gettable(-2); // env mex
if (l.islightuserdata(-1))
{
mex = l.GetLuaLightObject(-1) as ILuaMeta;
}
l.pop(2); // X
}
else
{
l.pop(1); // X
}
return(mex);
}
private static int LuaMetaCommonGC(IntPtr l)
{
IntPtr pud = l.touserdata(1);
IntPtr hval = System.Runtime.InteropServices.Marshal.ReadIntPtr(pud);
System.Runtime.InteropServices.GCHandle handle = new System.Runtime.InteropServices.GCHandle();
object obj = null;
try
{
handle = (System.Runtime.InteropServices.GCHandle)hval;
obj = handle.Target;
}
catch { }
if (obj != null)
{
var cache = LuaObjCache.GetObjCache(l);
if (cache != null)
{
cache.Remove(obj);
}
ILuaMeta mex = GetLuaMeta(l, 1);
if (mex != null)
{
mex.gc(l, obj); // note: the gc should not throw any exception!
}
}
try
{
handle.Free();
}
catch { }
return(0);
}