Async function

Development Programming & Scripting
1

Hey guys, in my project i have updating dynamic texture every tick, but it ‘eats’ my fps.
So i wanted to do it async, but i have no idea how to do it.
I checked Rama`s tutorials but still didnt understand anything.
Can u provide me an example how to run async function, for example print string?

2

I’m Sorry for my bad English.My engine vision is 4.13.2

first create header file:

#include "Runtime/SQLiteSupport/Public/SQLiteDatabaseConnection.h"


DEFINE_LOG_CATEGORY_STATIC(TestLog, Log, All);
class FSQLiteTask
{
public:
	FSQLiteTask(int16 _Index) :Index(_Index) {}
	static const TCHAR* GetTaskName()
	{
		return TEXT("FSQLiteTask");
	}
	FORCEINLINE static TStatId GetStatId()
	{
		RETURN_QUICK_DECLARE_CYCLE_STAT(FShowcaseTask, STATGROUP_TaskGraphTasks);
	}
	static ENamedThreads::Type GetDesiredThread()
	{
		return ENamedThreads::AnyThread;
	}
	static ESubsequentsMode::Type GetSubsequentsMode()
	{
		return ESubsequentsMode::TrackSubsequents;
	}
	void ExecuteSQL()
	{
		FSQLiteDatabase Datebase;
		Datebase.Open(TEXT("D:\\date.db"), nullptr, nullptr);
		Datebase.Execute(*(FString::Printf(TEXT("insert into test (id,name) values (1,123)"), *(FDateTime::Now().ToString()), *(FApp::GetSessionId().ToString()))));
		Datebase.Close();
		UE_LOG(TestLog, Log, TEXT("SQLite Execute"));
	}
	void DoTask(ENamedThreads::Type CurrentThread, const FGraphEventRef& MyCompletionGraphEvent)
	{
		UE_LOG(TestLog, Log, TEXT("TaskThread %d Run:1"), Index);
		ExecuteSQL();
	}
private:
	int16 Index;
};

at your game cpp file:

TGraphTask<FSQLiteTask>::CreateTask(NULL, ENamedThreads::GameThread).ConstructAndDispatchWhenReady(0);

Do not forget add #include your header file;

And you can use new Async function:

	TFunction<void()> Task = []()
	{
		FSQLiteDatabase Datebase;
		Datebase.Open(TEXT("D:\\date.db"), nullptr, nullptr);
		Datebase.Execute(*(FString::Printf(TEXT("insert into test (id,name) values (1,123)"), *(FDateTime::Now().ToString()), *(FApp::GetSessionId().ToString()))));
		Datebase.Close();
		UE_LOG(TestLog, Log, TEXT("SQLite Execute"));
	};
	auto result = Async(EAsyncExecution::TaskGraph, Task);

just enjoy this time;

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