FThread | Unreal Engine 4.27 Documentation

Unreal Engine C++ API Reference > Runtime > Core > HAL

References


Module	Core
Header	/Engine/Source/Runtime/Core/Public/HAL/Thread.h
Include	#include "HAL/Thread.h"

Syntax

class FThread

Remarks

Simple API for system threads. Before using, please make sure you really need a new system thread. By default and in the majority of cases parallel processing should be done by TaskGraph. For richer functionality check [FRunnable](API\Runtime\Core\HAL\FRunnable)_/FRunnableThread. It's up to user to provide a way to notify the thread function to exit on demand. Before destroying the instance it must be either Join_ed or Detach_ed. Example: FThread Thread{TEXT("New thread"), { do_something_important(); }}; // ... continue in the caller thread Thread.Join(); For more verbose example check TestTypicalUseCase_ in ThreadTest.cpp

Constructors

	Type	Name	Description
		FThread ()	Creates new "empty" thread object that doesn't represent a system thread
		FThread ( const FThread& )	Non-copyable
		FThread ( FThread&& )
		FThread ( TCHAR const* ThreadName, TUniqueFunction< void()>&& ThreadFunction, uint32 StackSize, EThreadPriority ThreadPriority, FThreadAffinity ThreadAffinity, EForkable IsForkable )	Creates and immediately starts a new system thread that will execute `ThreadFunction_ argument.
		FThread ( TCHAR const* ThreadName, TUniqueFunction< void()>&& ThreadFunction, TUniqueFunction< void()>&& SingleThreadTickFunction, uint32 StackSize, EThreadPriority ThreadPriority, FThreadAffinity ThreadAffinity, EForkable IsForkable )	With SingleThreadTickFunction that will be executed every frame if running with `-nothreading (FPlatformProcess::SupportsMultithreading() == false)

Destructors

	Type	Name	Description
		~FThread ()	Destructor asserts if the instance is not joined or detached.

Functions

Type	Name	Description
uint32	GetThreadId ()
bool	IsJoinable ()	Checks if the thread object identifies an active thread of execution.
void	Join ()	Blocks the current thread until the thread identified by `this_ finishes its execution.