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@ -128,16 +128,37 @@ void LuaScript::reportErrorWithTraceback(const std::string& errorDesc, const cha
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reportError(popString(), funcName);
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}
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void LuaScript::collectGarbage()
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{
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for(int i=0;i<2;i++)
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lua_gc(L, LUA_GCCOLLECT, 0);
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}
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int LuaScript::getStackSize()
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{
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return lua_gettop(L);
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}
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void LuaScript::moveTop(int index)
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void LuaScript::insert(int index)
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{
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lua_insert(L, index);
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}
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int LuaScript::ref()
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{
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return luaL_ref(L, LUA_REGISTRYINDEX);
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}
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void LuaScript::unref(int ref)
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{
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luaL_unref(L, LUA_REGISTRYINDEX, ref);
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}
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void LuaScript::getRef(int ref)
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{
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lua_rawgeti(L, LUA_REGISTRYINDEX, ref);
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}
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void LuaScript::pop(int n)
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{
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lua_pop(L, n);
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@ -191,11 +212,16 @@ void LuaScript::pushUserdata(void* ptr)
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lua_pushlightuserdata(L, ptr);
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}
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void LuaScript::pushValue(int index)
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{
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lua_pushvalue(L, index);
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}
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void LuaScript::pushClassInstance(const ScriptablePtr& object)
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{
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if(object) {
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// create weak_ptr to the scriptable object stored as userdata
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new(lua_newuserdata(L, sizeof(ScriptableWeakPtr))) ScriptableWeakPtr(object);
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new(lua_newuserdata(L, sizeof(ScriptablePtr))) ScriptablePtr(object);
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// set object metatable
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lua_getfield(L, LUA_REGISTRYINDEX, (std::string(object->getScriptableName()) + "_mt").c_str());
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lua_setmetatable(L, -2);
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@ -208,7 +234,7 @@ ScriptablePtr LuaScript::popClassInstance()
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{
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ScriptablePtr object;
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if(lua_isuserdata(L, -1)) { // instances are store as userdata
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object = ((ScriptableWeakPtr *)lua_touserdata(L, -1))->lock();
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object = *((ScriptablePtr *)lua_touserdata(L, -1));
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if(!object)
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reportErrorWithTraceback("attempt to retrive class instance from a object that is already expired");
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} else if(!lua_isnil(L, -1)) // we accept nil values
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@ -224,18 +250,18 @@ void LuaScript::pushFunction(int functionRef)
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int LuaScript::popFunction()
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{
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return luaL_ref(L, LUA_REGISTRYINDEX);
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return ref();
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}
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void LuaScript::releaseFunction(int functionRef)
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{
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luaL_unref(L, LUA_REGISTRYINDEX, functionRef);
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unref(functionRef);
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}
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void LuaScript::callFunction(int numArgs)
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{
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int size = lua_gettop(L);
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int errorIndex = size - numArgs;
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int errorIndex = -(numArgs + 2);
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lua_pushcfunction(L, &LuaScript::luaErrorHandler);
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lua_insert(L, errorIndex);
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@ -244,9 +270,10 @@ void LuaScript::callFunction(int numArgs)
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reportError(popString());
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}
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lua_remove(L, errorIndex);
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// pop error func
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lua_pop(L, 1);
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if(lua_gettop(L) + numArgs + 1 != size)
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if(lua_gettop(L) != size - numArgs - 1)
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reportError("stack size changed!");
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}
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@ -261,18 +288,20 @@ SimpleCallback LuaScript::createSimpleFuncCallback(int funcRef)
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boost::function<void(ScriptablePtr)> LuaScript::createScriptableSelfFuncCallback(int funcRef)
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{
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return [this, funcRef](ScriptablePtr scriptable) {
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pushClassInstance(scriptable);
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setGlobal("self");
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pushFunction(funcRef);
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setLocal(scriptable, "self");
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callFunction();
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pushNil();
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setGlobal("self");
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};
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}
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void LuaScript::setLocal(const ScriptablePtr& scriptable, const char *varName, int envIndex)
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void LuaScript::setGlobal(const char *varName)
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{
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lua_getfenv(L, envIndex);
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pushClassInstance(scriptable);
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lua_setfield(L, -2, varName);
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lua_pop(L, 1);
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lua_setfield(L, LUA_GLOBALSINDEX, varName);
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}
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void LuaScript::setupPackageLoader()
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@ -295,46 +324,78 @@ void LuaScript::setupPackageLoader()
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void LuaScript::registerClass(const std::string& klass, const std::string& baseClass)
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{
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// klass_mt = {}
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lua_newtable(L); // klass metatable
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lua_pushvalue(L, -1); // another reference to the metatable
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lua_setfield(L, LUA_REGISTRYINDEX, (klass + "_mt").c_str()); // register the metatable at registry index
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lua_newtable(L);
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lua_pushvalue(L, -1);
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lua_setfield(L, LUA_REGISTRYINDEX, (klass + "_mt").c_str());
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// set __gc metamethod, which collects userdata
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lua_pushcfunction(L, &LuaScript::luaCollectClassInstance);
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lua_setfield(L, -2, "__gc");
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// set __index metamethod
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lua_pushcfunction(L, &LuaScript::luaIndexMetaMethod);
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lua_setfield(L, -2, "__index");
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// set __newindex metamethod
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lua_pushcfunction(L, &LuaScript::luaNewIndexMetaMethod);
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lua_setfield(L, -2, "__newindex");
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// set __eq metamethod
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lua_pushcfunction(L, &LuaScript::luaCompareClassInstances);
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lua_pushcfunction(L, &LuaScript::luaEqualMetaMethod);
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lua_setfield(L, -2, "__eq");
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// klass = {}
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lua_newtable(L); // klass table
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lua_pushvalue(L, -1); // another reference to the table
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lua_setfield(L, LUA_GLOBALSINDEX, klass.c_str()); // register at globals index
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// klass.className = "klass"
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lua_pushstring(L, klass.c_str());
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lua_setfield(L, -2, "className");
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// set __gc metamethod, which collects userdata
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lua_pushcfunction(L, &LuaScript::luaGarbageCollectMetaMethod);
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lua_setfield(L, -2, "__gc");
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// klass_mt.__index = klass
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lua_setfield(L, -2, "__index");
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// klass_mt.methods = { }
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lua_newtable(L);
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lua_pushvalue(L, -1);
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lua_setfield(L, LUA_GLOBALSINDEX, klass.c_str());
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lua_setfield(L, -2, "methods");
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// klass_mt.fieldmethods = { }
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lua_newtable(L);
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lua_pushvalue(L, -1);
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lua_setfield(L, LUA_GLOBALSINDEX, (klass + "_fieldmethods").c_str());
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lua_setfield(L, -2, "fieldmethods");
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if(baseClass.length()) {
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// klass_mt.base = baseClass_mt
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lua_getfield(L, LUA_REGISTRYINDEX, (baseClass + "_mt").c_str());
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lua_setfield(L, -2, "base");
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}
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// pop the class metatable
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lua_pop(L, 1);
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}
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if(baseClass.length() > 0) {
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// add klass table to the top of the stack
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lua_getfield(L, LUA_GLOBALSINDEX, klass.c_str());
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// redirect = { __index = baseClass }
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lua_newtable(L);
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lua_getfield(L, LUA_GLOBALSINDEX, baseClass.c_str());
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lua_setfield(L, -2, "__index");
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void LuaScript::registerMemberField(const std::string& klass, const std::string& field, LuaScript::LuaCFunction getFunction, LuaScript::LuaCFunction setFunction)
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{
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if(getFunction) {
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int functionId = m_functions.size();
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m_functions.push_back(getFunction);
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// setmetatable(klass, redirect)
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lua_setmetatable(L, -2);
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// push the class table
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lua_getfield(L, LUA_GLOBALSINDEX, (klass + "_fieldmethods").c_str());
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// push the function id
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lua_pushnumber(L, functionId);
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// store id in the closure
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lua_pushcclosure(L, &LuaScript::luaFunctionCallback, 1);
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// store the function at the class field functionName
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lua_setfield(L, -2, ("get_" + field).c_str());
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// pop the table
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lua_pop(L, 1);
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}
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// pop the derived class table
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if(setFunction) {
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int functionId = m_functions.size();
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m_functions.push_back(setFunction);
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// push the class table
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lua_getfield(L, LUA_GLOBALSINDEX, (klass + "_fieldmethods").c_str());
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// push the function id
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lua_pushnumber(L, functionId);
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// store id in the closure
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lua_pushcclosure(L, &LuaScript::luaFunctionCallback, 1);
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// store the function at the class field functionName
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lua_setfield(L, -2, ("set_" + field).c_str());
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// pop the table
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lua_pop(L, 1);
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}
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}
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@ -389,24 +450,106 @@ int LuaScript::luaPackageLoader(lua_State* L)
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return 1;
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}
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int LuaScript::luaCollectClassInstance(lua_State* L)
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int LuaScript::luaIndexMetaMethod(lua_State* L)
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{
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std::string key = lua_tostring(L, -1); // key, obj
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lua_pop(L, 1); // obj
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lua_getmetatable(L, -1); // mt, obj
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while(!lua_isnil(L, -1)) {
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lua_getfield(L, -1, "fieldmethods"); // mt.fieldmethods, mt, obj
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lua_getfield(L, -1, ("get_" + key).c_str()); // mt.fieldmethods[get_key], mt.fieldmethods, mt, obj
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lua_remove(L, -2); // mt.fieldmethods[get_key], mt, obj
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if(!lua_isnil(L, -1)) {
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lua_remove(L, -2); // mt.fieldmethods[get_key], obj
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lua_insert(L, -2); // obj, mt.fieldmethods[get_key]
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lua_pushcfunction(L, &LuaScript::luaErrorHandler); // errorfunc, obj, mt.fieldmethods[get_key]
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lua_insert(L, -3); // obj, mt.fieldmethods[get_key], errorfunc
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int ret = lua_pcall(L, 1, 1, -3); // ret, errorfunc
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if(ret != 0) {
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g_lua.reportError(g_lua.popString()); // errofunc
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lua_pop(L, 1); // (empty)
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lua_pushnil(L); // nil
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} else {
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lua_remove(L, -2); // ret
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}
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return 1;
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} else {
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lua_pop(L, 1); // mt, obj
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lua_getfield(L, -1, "methods"); // mt.methods, mt, obj
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lua_getfield(L, -1, key.c_str()); // mt.methods[key], mt.methods, mt, obj
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lua_remove(L, -2); // mt.methods[key], mt, obj
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if(!lua_isnil(L, -1)) {
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lua_insert(L, -3);
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lua_pop(L, 2);
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return 1;
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}
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lua_pop(L, 1);
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}
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|
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lua_getfield(L, -1, "base"); // mt.base, mt, obj
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lua_remove(L, -2); // mt.base, obj
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}
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lua_pop(L, 1);
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|
ScriptablePtr scriptable = g_lua.popClassInstance();
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|
int refId = scriptable->getLuaRef(key);
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|
|
if(refId != -1)
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|
|
g_lua.getRef(refId);
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else
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|
|
g_lua.pushNil();
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|
|
return 1;
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|
|
}
|
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|
|
int LuaScript::luaNewIndexMetaMethod(lua_State* L)
|
|
|
|
|
{
|
|
|
|
|
ScriptableWeakPtr *objectRef = (ScriptableWeakPtr *)lua_touserdata(L, -1);
|
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|
|
objectRef->reset();
|
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|
|
|
// stack: value, key, obj
|
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|
|
|
lua_insert(L, -2);
|
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|
|
std::string key = lua_tostring(L, -1);
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|
|
lua_pop(L, 1);
|
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|
|
|
lua_getmetatable(L, -2);
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|
|
// stack: mt, value, obj
|
|
|
|
|
while(!lua_isnil(L, -1)) {
|
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|
|
lua_getfield(L, -1, "fieldmethods");
|
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|
|
lua_getfield(L, -1, ("set_" + key).c_str());
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|
|
lua_remove(L, -2); // stack: set method, mt, value, obj
|
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|
|
if(!lua_isnil(L, -1)) {
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|
|
lua_remove(L, -2); // mt.fieldmethods[get_key], value, obj
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lua_insert(L, -3); // value, obj, mt.fieldmethods[get_key]
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lua_pushcfunction(L, &LuaScript::luaErrorHandler); // errorfunc, value, obj, mt.fieldmethods[get_key]
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lua_insert(L, -4); // value, obj, mt.fieldmethods[get_key], errorfunc
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int ret = lua_pcall(L, 2, 0, -4); // errorfunc
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if(ret != 0)
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g_lua.reportError(g_lua.popString()); // errofunc
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lua_pop(L, 1);
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return 1;
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}
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lua_pop(L, 1); // mt, value, obj
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lua_getfield(L, -1, "base"); // mt.base, mt, value, obj
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lua_remove(L, -2); // mt.base, value, obj
|
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}
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// stack:
|
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g_lua.pop(); // value, obj
|
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g_lua.insert(-2); // obj, value
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ScriptablePtr scriptable = g_lua.popClassInstance();
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g_lua.pushValue(); // value, value
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int refId = g_lua.ref();
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scriptable->associateLuaRef(key, refId);
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g_lua.pop();
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return 1;
|
|
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|
|
}
|
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|
|
int LuaScript::luaCompareClassInstances(lua_State* L)
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|
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int LuaScript::luaEqualMetaMethod(lua_State* L)
|
|
|
|
|
{
|
|
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|
|
if(!lua_isuserdata(L, -1) || !lua_isuserdata(L, -2)) {
|
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|
|
lua_pop(L, 2);
|
|
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|
|
lua_pushboolean(L, 0);
|
|
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|
|
} else {
|
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|
|
ScriptableWeakPtr *objectRef1 = (ScriptableWeakPtr *)lua_touserdata(L, -1);
|
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|
|
ScriptableWeakPtr *objectRef2 = (ScriptableWeakPtr *)lua_touserdata(L, -2);
|
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|
|
ScriptablePtr *objectRef1 = (ScriptablePtr *)lua_touserdata(L, -1);
|
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|
|
ScriptablePtr *objectRef2 = (ScriptablePtr *)lua_touserdata(L, -2);
|
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|
|
lua_pop(L, 2);
|
|
|
|
|
if(objectRef1->lock() == objectRef2->lock())
|
|
|
|
|
if(objectRef1 == objectRef2)
|
|
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|
|
lua_pushboolean(L, 1);
|
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|
|
else
|
|
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|
|
lua_pushboolean(L, 0);
|
|
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|
|
@ -414,6 +557,14 @@ int LuaScript::luaCompareClassInstances(lua_State* L)
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|
|
return 1;
|
|
|
|
|
}
|
|
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|
|
int LuaScript::luaGarbageCollectMetaMethod(lua_State* L)
|
|
|
|
|
{
|
|
|
|
|
ScriptablePtr *objectRef = (ScriptablePtr *)lua_touserdata(L, -1);
|
|
|
|
|
objectRef->reset();
|
|
|
|
|
lua_pop(L, 1);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
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|
|
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|
|
int LuaScript::luaFunctionCallback(lua_State* L)
|
|
|
|
|
{
|
|
|
|
|
// look for function id
|
|
|
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Eduardo Bart
13 years ago