Method CallFunctionFromForeignState

src/Bindings/PluginLua.cpp:1585–1613

int cPluginLua::CallFunctionFromForeignState(
	const AString & a_FunctionName,
	cLuaState & a_ForeignState,
	int a_ParamStart,
	int a_ParamEnd
)
{
	cCSLock Lock(m_CriticalSection);
	
	// Call the function:
	int NumReturns = m_LuaState.CallFunctionWithForeignParams(a_FunctionName, a_ForeignState, a_ParamStart, a_ParamEnd);
	if (NumReturns < 0)
	{
		// The call has failed, an error has already been output to the log, so just silently bail out with the same error
		return NumReturns;
	}
	
	// Copy all the return values:
	int Top = lua_gettop(m_LuaState);
	int res = a_ForeignState.CopyStackFrom(m_LuaState, Top - NumReturns + 1, Top);
	
	// Remove the return values off this stack:
	if (NumReturns > 0)
	{
		lua_pop(m_LuaState, NumReturns);
	}
	
	return res;
}