//----------------------------------------------------------------//
int MOAILuaObject::_gc ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* self = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
self->mCollected = true;
if ( MOAILuaRuntime::IsValid ()) {
if ( self->mFinalizer ) {
self->mFinalizer.PushRef ( state );
if ( state.IsType ( -1, LUA_TFUNCTION )) {
state.DebugCall ( 0, 0 );
}
else if ( state.IsType ( -1, LUA_TSTRING )) {
printf ( "%s\n", state.GetValue < cc8* >( -1, "" ));
}
else {
state.Pop ( 1 );
}
self->mFinalizer.Clear ();
}
if ( MOAILuaRuntime::Get ().mReportGC ) {
printf ( "GC %s <%p>\n", self->TypeName (), self );
}
}
if ( self->GetRefCount () == 0 ) {
delete ( self );
}
return 0;
}
//----------------------------------------------------------------//
int MOAILuaObject::_tostring ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* data = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
if ( data ) {
STLString str;
lua_getfield ( state, 1, "getClassName" );
if ( state.IsType ( -1, LUA_TFUNCTION )) {
lua_pushvalue ( state, 1 );
state.DebugCall ( 1, 1 );
cc8* classname = state.GetValue < cc8* >( -1, "" );
str.write ( "%p <%s>", data, classname );
state.Push ( str );
return 1;
}
str.write ( "%p <%s>", data, data->TypeName ());
state.Push ( str );
return 1;
}
return 0;
}
//----------------------------------------------------------------//
int MOAILuaObject::_getClassName ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* object = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
if ( object ) {
lua_pushstring ( L, object->TypeName ());
return 1;
}
return 0;
}
//----------------------------------------------------------------//
int MOAILuaObject::_getClass ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* object = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
if ( object ) {
object->PushLuaClassTable ( state );
return 1;
}
return 0;
}
//----------------------------------------------------------------//
int MOAILuaObject::_tostring ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* data = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
if ( data ) {
STLString str;
str.write ( "0x%p <%s>", data, data->TypeName ()); // TODO: 64-bit
state.Push ( str );
return 1;
}
return 0;
}
//----------------------------------------------------------------//
int MOAILuaObject::_gc ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* data = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
bool cleanup = ( data->GetRefCount () == 0 ); // ready to cleanup if no references
// in any event, let's get rid of the userdata and lua refs we know about
data->ClearLocal ( data->mContain );
data->mUserdata.Clear ();
data->mMemberTable.Clear ();
// check to see if gc is being invoked during finalization
if ( MOAILuaRuntime::IsValid ()) {
MOAILuaRuntime::Get ().ClearObjectStackTrace ( data );
}
// delete if no references
if ( cleanup ) {
delete data;
}
return 0;
}
//----------------------------------------------------------------//
int MOAILuaObject::_index ( lua_State* L ) {
MOAILuaState state ( L );
MOAILuaObject* data = ( MOAILuaObject* )state.GetPtrUserData ( 1 );
if ( data ) {
//AJV for debugging
//__android_log_print(ANDROID_LOG_INFO, "MoaiLog", "0x%p <%s>", data, data->TypeName ());
}
// push the instance table
lua_getmetatable ( L, 1 );
// push the member table
lua_pushstring ( L, LUA_MEMBER_TABLE_NAME );
lua_rawget ( L, -2 );
// try to get the value
lua_pushvalue ( L, 2 );
lua_gettable ( L, -2 );
// if nil...
if ( lua_isnil ( L, -1 )) {
// pop the nil and the member table
lua_pop ( L, 2 );
// get the instance table's metatable (the interface table)
lua_getmetatable ( L, -1 );
// and try to get the value from the interface table directly
lua_pushvalue ( L, 2 );
lua_rawget ( L, -2 );
}
return 1;
}
//----------------------------------------------------------------//
int MOAILuaClass::_extendSingleton ( lua_State* L ) {
MOAILuaState state ( L );
// upvalues:
// 1: singleton userdata
// 2: class table
// set the userdata
MOAILuaObject* luaData = ( MOAILuaObject* )state.GetPtrUserData ( lua_upvalueindex ( 1 ));
state.PushPtrUserData ( luaData );
// clone the class table
state.CloneTable ( lua_upvalueindex ( 2 ));
lua_pushvalue ( state, -1 );
lua_setfield ( state, -2, "__index" );
lua_pushvalue ( state, -1 );
lua_setfield ( state, -2, "__newindex" );
// add getClassName to class table
lua_pushvalue ( L, 1 );
lua_pushcclosure ( L, _getUpvalue, 1 );
lua_setfield ( L, -2, "getClassName" );
// copy the extended userdata
lua_pushvalue ( L, -2 );
// copy the extended table
lua_pushvalue ( L, -2 );
// push the 'extend' method with the singleton userdata and extended class table upvalues
lua_pushcclosure ( L, _extendSingleton, 2 );
// set the extended 'extend' method...
lua_setfield ( L, -2, "extend" );
// stack:
// -1: extended class table
// -2: extended userdata
// call the extender
if ( state.IsType ( 2, LUA_TFUNCTION )) {
lua_pushvalue ( L, 2 );
lua_pushvalue ( L, -2 );
lua_pushvalue ( L, lua_upvalueindex ( 2 ));
state.DebugCall ( 2, 0 );
}
// stack:
// -1: extended class table
// -2: extended userdata
// set the table as a metatable on the userdata
lua_setmetatable ( L, -2 );
// and we're done
cc8* classname = state.GetValue < cc8* >( 1, "" );
lua_setglobal ( state, classname );
return 0;
}
//----------------------------------------------------------------//
// This beast will walk through all tables and functions accessible in the
// current lua state and print a reference line for each one found to help
// track who is pointing to it.
void MOAILuaRuntime::FindAndPrintLuaRefs ( int idx, cc8* prefix, FILE *f, const LeakPtrList& objects ) {
lua_State* L = this->mMainState;
// Convert to absolute index
if ( idx < 0 ) {
idx = lua_gettop(L) + idx + 1;
}
// Check if the item at the top of the stack has been traversed yet.
lua_pushvalue ( L, -1 );
lua_gettable ( L, idx );
if( lua_type ( L, -1 ) != LUA_TNIL ) {
// It has, let's bail.
lua_pop ( L, 1 ); // Clean our 'true'
return;
}
lua_pop(L, 1); // Remove the nil
int tt = lua_type ( L, -1 );
if( tt == LUA_TTABLE ) {
// printf("finding refs in: %s\n", prefix);
// It hasn't been visited, so mark it in our traversal set
lua_pushvalue ( L, -1 ); // Push table as key
lua_pushboolean ( L, true );
lua_settable ( L, idx );
lua_pushnil ( L ); // first key
while ( lua_next ( L, -2 ) != 0 ) {
// use the 'key' (at index -2) and 'value' (at index -1)
STLString key;
if ( lua_type ( L, -2) == LUA_TSTRING ) {
if ( MOAILuaRuntime::IsLuaIdentifier ( lua_tostring ( L, -2 ))) {
key.write ( "%s.%s", prefix, lua_tostring ( L, -2 ));
}
else {
// TODO: escape '\"'
key.write ( "%s[\"%s\"]", prefix, lua_tostring ( L, -2 ));
}
}
else {
// stringify key
lua_getglobal ( L, "tostring" );
lua_pushvalue ( L, -3 );
lua_call ( L, 1, 1 );
key.write ( "%s[%s]", prefix, lua_tostring ( L, -1 ));
// Pop stringified key
lua_pop ( L, 1 );
}
this->FindAndPrintLuaRefs ( idx, key.c_str (), f, objects );
// removes 'value'; keeps 'key' for next iteration
lua_pop ( L, 1 );
}
// Check its metatable (if it has one)
if ( lua_getmetatable ( L, -1 )) {
STLString key;
key.write ( "%s~mt", prefix );
this->FindAndPrintLuaRefs ( idx, key.c_str(), f, objects );
lua_pop ( L, 1 ); // Pop metatable
}
}
else if ( tt == LUA_TFUNCTION ) {
// printf("finding refs in: %s\n", prefix);
// It hasn't been visited, so mark it in our tarversal set
lua_pushvalue ( L, -1 ); // Push table as key
lua_pushboolean ( L, true );
lua_settable ( L, idx );
const char *upname;
for ( int i = 1; ( upname = lua_getupvalue ( L, -1, i )) != NULL; ++i ) {
STLString key;
key.write ( "%s(%s)", prefix, upname );
this->FindAndPrintLuaRefs ( idx, key.c_str(), f, objects );
// Pop the upvalue
lua_pop ( L, 1 );
}
}
else if ( tt == LUA_TUSERDATA ) {
// It hasn't been visited, so mark it in our traversal set
lua_pushvalue ( L, -1 ); // Push table as key
lua_pushboolean ( L, true );
lua_settable ( L, idx );
MOAILuaState state ( L );
void *ud = state.GetPtrUserData ( -1 );
for ( LeakPtrList::const_iterator i = objects.begin (); i != objects.end (); ++i ) {
if( *i == ud ) {
fprintf ( f, "\tLua Ref: %s = %s <%p>\n", prefix, ( *i )->TypeName (), ud );
// if ( strcmp((*i)->TypeName(), "MOAICoroutine") == 0 ) {
// MOAICoroutine *t = (MOAICoroutine*)ud;
// }
}
}
// Check its metatable (if it has one)
if ( lua_getmetatable ( L, -1 )) {
STLString key;
key.write ( "%s~mt", prefix );
this->FindAndPrintLuaRefs ( idx, key.c_str (), f, objects );
lua_pop ( L, 1 ); // Pop metatable
}
}
}