UDocumentation UE5.7 10.02.2026 (Source)
API documentation for Unreal Engine 5.7
UnixPlatformRealTimeSignals.h
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1// Copyright Epic Games, Inc. All Rights Reserved.
2
3#pragma once
4
5// Central location to define all real time signal in use
6
7// Used in UnixPlatformProcess.cpp for forking
8#define WAIT_AND_FORK_QUEUE_SIGNAL SIGRTMIN + 1
9#define WAIT_AND_FORK_RESPONSE_SIGNAL SIGRTMIN + 2
10
11// Used in UnixSignalGameHitchHeartBeat.cpp for a hitch signal handler
12#define HEART_BEAT_SIGNAL SIGRTMIN + 3
13
14// Skip SIGRTMIN + 4 default signal used in VTune
15
16// Using in UnixPlatformCrashContext.cpp/UnixPlatformStackWalk.cpp for gathering current callstack from a thread
17#define THREAD_CALLSTACK_GENERATOR SIGRTMIN + 5