DECLARE_DYNAMIC_MULTICAST_DELEGATE

c++
unreal
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David Jefferies
Topic Author
Posts: 27
Joined: 14 Jan 2021, 17:09

DECLARE_DYNAMIC_MULTICAST_DELEGATE

11 Jul 2023, 19:50

In Unreal I have some code where I have a DECLARE_DYNAMIC_MULTICAST_DELEGATE in a base class and then use it multiple times in a derived class.

Code: Select all
UCLASS(Blueprintable)
class UBaseDataModel : public UObject
{
	GENERATED_BODY()
protected:
	DECLARE_DYNAMIC_MULTICAST_DELEGATE(FNoesisDataEventDelegate);
};


UCLASS(Blueprintable)
class UMyDataModel : public UBaseDataModel 
{
   GENERATED_BODY()
public:
   UPROPERTY()
   FNoesisDataEventDelegate PlayAnim1;
   UPROPERTY()
   FNoesisDataEventDelegate PlayAnim2;
   UPROPERTY()
   FNoesisDataEventDelegate PlayAnim3;
};
This works OK if I only declare a few (sometimes 3, sometimes 4) delegates but any more than that and there's an exception on exiting PIE in Remove() in Delegate.Inl
Code: Select all
    /// Remove delegate
    void Remove(const Delegate& d)
    {
        GetImpl()->Remove(d);
    }
Is it possible to reuse the same delegate for multiple DataTriggers or do I need to make a new declaration for each one?
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hcpizzi
Site Admin
Posts: 339
Joined: 09 Feb 2012, 12:40

Re: DECLARE_DYNAMIC_MULTICAST_DELEGATE

11 Jul 2023, 21:12

Yes, that should be possible. Could you post the whole crash stack?
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David Jefferies
Topic Author
Posts: 27
Joined: 14 Jan 2021, 17:09

Re: DECLARE_DYNAMIC_MULTICAST_DELEGATE

11 Jul 2023, 21:55

Code: Select all
[Inlined] Noesis::Delegate<void __cdecl(Noesis::BaseComponent *,Noesis::EventArgs const &)>::Remove(const Noesis::Delegate<void __cdecl(Noesis::BaseComponent *,Noesis::EventArgs const &)> &) Delegate.inl:154
[Inlined] Noesis::Delegate<void __cdecl(Noesis::BaseComponent *,Noesis::EventArgs const &)>::operator-=(const Noesis::Delegate<void __cdecl(Noesis::BaseComponent *,Noesis::EventArgs const &)> &) Delegate.inl:160
NoesisApp::DataEventTrigger::UnregisterEvent() DataEventTrigger.cpp:101
[Inlined] NoesisApp::DataEventTrigger::StaticFillClassType::__l2::<lambda_c59d3410317593f84bf83ddc37dcc710>::operator()(Noesis::DependencyObject *,const Noesis::DependencyPropertyChangedEventArgs &) DataEventTrigger.cpp:124
Noesis::Delegate<void __cdecl(Noesis::DependencyObject *,Noesis::DependencyPropertyChangedEventArgs const &)>::FunctorStub<<lambda_c59d3410317593f84bf83ddc37dcc710> >::Invoke(Noesis::DependencyObject *,const Noesis::DependencyPropertyChangedEventArgs &) Delegate.inl:431
<unknown> 0x00007ffbd1d7fb54
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
Noesis::ValueStorageManagerImpl<Noesis::Ptr<Noesis::BaseComponent> >::SetValue(Noesis::DependencyObject *,const Noesis::DependencyProperty *,const void *,unsigned char,Noesis::Expression *,const Noesis::PropertyMetadata *,Destination) ValueStorageManagerImpl.inl:230
<unknown> 0x00007ffbd1d7a67b
<unknown> 0x00007ffbd1d7b491
<unknown> 0x00007ffbd1da3be5
<unknown> 0x00007ffbd1d8e5d3
<unknown> 0x00007ffbd1e16389
<unknown> 0x00007ffbd1f0c7e4
<unknown> 0x00007ffbd1ef4db0
<unknown> 0x00007ffbd1e0dce1
<unknown> 0x00007ffbd1e74cf5
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e12d30
<unknown> 0x00007ffbd1e0dd06
<unknown> 0x00007ffbd1dc6205
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
<unknown> 0x00007ffbd1d9224d
<unknown> 0x00007ffbd1d91add
<unknown> 0x00007ffbd1e4b27d
<unknown> 0x00007ffbd1e4a126
<unknown> 0x00007ffbd1e4a3b3
<unknown> 0x00007ffbd1d8e5d3
<unknown> 0x00007ffbd1e47bf1
<unknown> 0x00007ffbd1e4d4de
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
<unknown> 0x00007ffbd1d92850
<unknown> 0x00007ffbd1d7a67b
<unknown> 0x00007ffbd1d7b491
<unknown> 0x00007ffbd1da3be5
<unknown> 0x00007ffbd1e16389
<unknown> 0x00007ffbd1f0c7e4
<unknown> 0x00007ffbd1ef4db0
<unknown> 0x00007ffbd1e0dce1
<unknown> 0x00007ffbd1dcc84a
<unknown> 0x00007ffbd1e4d044
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e12c91
<unknown> 0x00007ffbd1e0dd06
<unknown> 0x00007ffbd1e74cf5
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e12c91
<unknown> 0x00007ffbd1e0dd06
<unknown> 0x00007ffbd1e74cf5
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e12c91
<unknown> 0x00007ffbd1e0dd06
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e12c91
<unknown> 0x00007ffbd1e0dd06
<unknown> 0x00007ffbd1dcc84a
<unknown> 0x00007ffbd1dc54c5
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
<unknown> 0x00007ffbd1d9224d
<unknown> 0x00007ffbd1d91add
[Inlined] Noesis::FControls::FViewLoader::UpdateContentData() ViewLoader.cpp:77
Noesis::FControls::FViewLoader::OnPropertyChanged(const Noesis::DependencyPropertyChangedEventArgs &) ViewLoader.cpp:61
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
Noesis::ValueStorageManagerImpl<Noesis::Ptr<Noesis::BaseComponent> >::SetValue(Noesis::DependencyObject *,const Noesis::DependencyProperty *,const void *,unsigned char,Noesis::Expression *,const Noesis::PropertyMetadata *,Destination) ValueStorageManagerImpl.inl:230
<unknown> 0x00007ffbd1d7a67b
<unknown> 0x00007ffbd1d7b647
<unknown> 0x00007ffbd1da3be5
<unknown> 0x00007ffbd1d8e5d3
<unknown> 0x00007ffbd1e16389
<unknown> 0x00007ffbd1f0c7e4
<unknown> 0x00007ffbd1ef4db0
<unknown> 0x00007ffbd1e0dce1
<unknown> 0x00007ffbd1dcc84a
<unknown> 0x00007ffbd1dc54c5
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e12d30
<unknown> 0x00007ffbd1e0dd06
<unknown> 0x00007ffbd1dc6205
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
<unknown> 0x00007ffbd1d9224d
<unknown> 0x00007ffbd1d91add
<unknown> 0x00007ffbd1e4b27d
<unknown> 0x00007ffbd1e4a126
<unknown> 0x00007ffbd1e4a3b3
<unknown> 0x00007ffbd1d8e5d3
<unknown> 0x00007ffbd1e47bf1
<unknown> 0x00007ffbd1e4d4de
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
<unknown> 0x00007ffbd1d92850
<unknown> 0x00007ffbd1d7a67b
<unknown> 0x00007ffbd1d7b491
<unknown> 0x00007ffbd1da3be5
<unknown> 0x00007ffbd1d8e5d3
<unknown> 0x00007ffbd1e16389
<unknown> 0x00007ffbd1f0c7e4
<unknown> 0x00007ffbd1ef4db0
<unknown> 0x00007ffbd1e0dce1
<unknown> 0x00007ffbd1dcc84a
<unknown> 0x00007ffbd1e4d044
<unknown> 0x00007ffbd1e12599
<unknown> 0x00007ffbd1e123c3
<unknown> 0x00007ffbd1e12a4e
<unknown> 0x00007ffbd1e0d1f9
<unknown> 0x00007ffbd1dc540e
<unknown> 0x00007ffbd1dc54fb
<unknown> 0x00007ffbd1d7baed
<unknown> 0x00007ffbd1d7ae70
<unknown> 0x00007ffbd1d9224d
<unknown> 0x00007ffbd1d91add
<unknown> 0x00007ffbd1dc5488
<unknown> 0x00007ffbd1dd74d7
<unknown> 0x00007ffbd1d86929
<unknown> 0x00007ffbd1effa89
<unknown> 0x00007ffbd1f002c4
<unknown> 0x00007ffbd1d7a38c
<unknown> 0x00007ffbd1f00bdc
<unknown> 0x00007ffbd1f00a14
<unknown> 0x00007ffbd1d61c93
[Inlined] Noesis::Ptr<Noesis::IView>::Reset() Ptr.inl:156
UNoesisInstance::TermInstance() NoesisInstance.cpp:1098
UNoesisInstance::NativeDestruct() NoesisInstance.cpp:1771
SObjectWidget::ResetWidget() SObjectWidget.cpp:57
SObjectWidget::~SObjectWidget() SObjectWidget.cpp:48
[Inlined] SharedPointerInternals::TReferenceControllerBase<1>::ReleaseSharedReference() SharedPointerInternals.h:223
[Inlined] SharedPointerInternals::FSharedReferencer<1>::{dtor}() SharedPointerInternals.h:586
FSlotBase::~FSlotBase() SlotBase.cpp:111
SConstraintCanvas::FSlot::`vector deleting destructor'(unsigned int) 0x00007ffc5cb9c23d
[Inlined] TDefaultDelete<SConstraintCanvas::FSlot>::operator()(SConstraintCanvas::FSlot *) UniquePtr.h:64
[Inlined] TUniquePtr<SConstraintCanvas::FSlot,TDefaultDelete<SConstraintCanvas::FSlot> >::{dtor}() UniquePtr.h:266
[Inlined] DestructItems(TUniquePtr<SConstraintCanvas::FSlot,TDefaultDelete<SConstraintCanvas::FSlot> > *,int) MemoryOps.h:97
[Inlined] TArray<TUniquePtr<SConstraintCanvas::FSlot,TDefaultDelete<SConstraintCanvas::FSlot> >,TSizedDefaultAllocator<32> >::{dtor}() Array.h:684
TPanelChildren<SConstraintCanvas::FSlot>::~TPanelChildren<SConstraintCanvas::FSlot>() 0x00007ffc5cb93cb0
SConstraintCanvas::~SConstraintCanvas() 0x00007ffc5cb98965
[Inlined] SharedPointerInternals::TReferenceControllerBase<1>::ReleaseSharedReference() SharedPointerInternals.h:223
[Inlined] SharedPointerInternals::FSharedReferencer<1>::{dtor}() SharedPointerInternals.h:586
UGameViewportSubsystem::RemoveWidgetInternal(UWidget *,const TWeakPtr<SConstraintCanvas,1> &,const TWeakObjectPtr<ULocalPlayer,FWeakObjectPtr> &) GameViewportSubsystem.cpp:213
UGameViewportSubsystem::RemoveWidget(UWidget *) GameViewportSubsystem.cpp:190
UWidget::RemoveFromParent() Widget.cpp:853
AViewHUD::EndPlay(Type) ViewHUD.cpp:309
[Inlined] AActor::RouteEndPlay(Type) Actor.cpp:2610
AActor::Destroyed() Actor.cpp:2692
UWorld::DestroyActor(AActor *,bool,bool) LevelActor.cpp:872
AActor::Destroy(bool,bool) Actor.cpp:4594
APlayerController::Destroyed() PlayerController.cpp:1569
UWorld::DestroyActor(AActor *,bool,bool) LevelActor.cpp:872
AActor::Destroy(bool,bool) Actor.cpp:4594
UGameInstance::RemoveLocalPlayer(ULocalPlayer *) GameInstance.cpp:902
UGameInstance::CleanupGameViewport() GameInstance.cpp:1154
UEngine::CleanupGameViewport() UnrealEngine.cpp:3491
UEditorEngine::EndPlayMap() PlayLevel.cpp:313
UEditorEngine::Tick(float,bool) EditorEngine.cpp:2207
UUnrealEdEngine::Tick(float,bool) UnrealEdEngine.cpp:514
FEngineLoop::Tick() LaunchEngineLoop.cpp:5363
[Inlined] EngineTick() Launch.cpp:66
GuardedMain(const wchar_t *) Launch.cpp:204
LaunchWindowsStartup(HINSTANCE__ *,HINSTANCE__ *,char *,int,const wchar_t *) LaunchWindows.cpp:233
WinMain(HINSTANCE__ *,HINSTANCE__ *,char *,int) LaunchWindows.cpp:282
[Inlined] invoke_main() 0x00007ff636a7a566
__scrt_common_main_seh() 0x00007ff636a7a545
<unknown> 0x00007ffcdd227614
<unknown> 0x00007ffcdd3626f1
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hcpizzi
Site Admin
Posts: 339
Joined: 09 Feb 2012, 12:40

Re: DECLARE_DYNAMIC_MULTICAST_DELEGATE

12 Jul 2023, 09:23

Ok, I see what the problem is. I've created a ticket for it, will provide you with a patch as soon as I can.

Here's the link to the ticket: https://www.noesisengine.com/bugs/view.php?id=2649
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hcpizzi
Site Admin
Posts: 339
Joined: 09 Feb 2012, 12:40

Re: DECLARE_DYNAMIC_MULTICAST_DELEGATE

13 Jul 2023, 19:15

Hi,

I've attached a patch to the ticket linked above. Could you give it a try and let us know if the issue is resolved?

Thanks!
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David Jefferies
Topic Author
Posts: 27
Joined: 14 Jan 2021, 17:09

Re: DECLARE_DYNAMIC_MULTICAST_DELEGATE

14 Jul 2023, 12:50

Hi, thanks for confirming and fixing the issue, we'll try the patch and report back - it might be a week or two after an upcoming deadline
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