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1f41b6f103
- Added ability to retry stale background downloads when we're in foreground on iOS - Fixing race condition on background file hash helper invoked from different threads #rb adam.kinge [CL 34453579 by dmytro ivanov in ue5-main branch]
105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "IOS/ApplePlatformBackgroundHttpManager.h"
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#include "IOS/ApplePlatformBackgroundHttp.h"
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#include "IOS/ApplePlatformBackgroundHttpRequest.h"
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#include "IOS/ApplePlatformBackgroundHttpResponse.h"
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#include "HAL/PlatformFileManager.h"
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#include "HAL/PlatformAtomics.h"
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#include "Misc/ConfigCacheIni.h"
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#include "Misc/CoreDelegates.h"
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#include "Misc/ScopeRWLock.h"
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#include "Stats/Stats.h"
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#include "IOS/IOSBackgroundURLSessionHandler.h"
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#include "PlatformBackgroundHttp.h"
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void FApplePlatformBackgroundHttpManager::AddRequest(const FBackgroundHttpRequestPtr GenericRequest)
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{
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FAppleBackgroundHttpRequestPtr Request = StaticCastSharedPtr<FApplePlatformBackgroundHttpRequest>(GenericRequest);
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if (!ensureAlwaysMsgf(Request.IsValid(), TEXT("Adding a non-Apple background request to our Apple Background Http Manager2! This is not supported or expected!")))
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{
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return;
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}
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if (AssociateWithAnyExistingRequest(Request))
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{
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return;
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}
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const uint64 DownloadId = FBackgroundURLSessionHandler::CreateOrFindDownload(Request->GetURLList(), Request->GetNSURLSessionPriority(), GetFileHashHelper());
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Request->SetInternalDownloadId(DownloadId);
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// Should never happen in practice
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if (DownloadId == FBackgroundURLSessionHandler::InvalidDownloadId)
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{
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FBackgroundHttpResponsePtr Response = FPlatformBackgroundHttp::ConstructBackgroundResponse(EHttpResponseCodes::ServerError, FString());
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Request->CompleteWithExistingResponseData(Response);
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return;
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}
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{
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FRWScopeLock ActiveScopeLock(ActiveRequestLock, SLT_Write);
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ActiveRequests.Add(Request);
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}
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++NumCurrentlyActiveRequests;
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}
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void FApplePlatformBackgroundHttpManager::RemoveRequest(const FBackgroundHttpRequestPtr GenericRequest)
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{
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// UpdateProgress might call RemoveRequest, so we could deadlock on ActiveRequestLock if we try to edit ActiveRequests
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FRWScopeLock PendingScopeRemoveRequestLock(PendingRemoveRequestLock, SLT_Write);
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PendingRemoveRequests.Add(GenericRequest);
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}
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void FApplePlatformBackgroundHttpManager::SetCellularPreference(int32 Value)
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{
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FBackgroundURLSessionHandler::AllowCellular(Value > 0);
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}
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bool FApplePlatformBackgroundHttpManager::Tick(float DeltaTime)
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{
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QUICK_SCOPE_CYCLE_COUNTER(STAT_FApplePlatformBackgroundHttpManager_Tick);
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ensureAlwaysMsgf(IsInGameThread(), TEXT("Called from un-expected thread! Potential error in an implementation of background downloads!"));
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{
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FRWScopeLock ScopeLock(ActiveRequestLock, SLT_ReadOnly);
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for (FBackgroundHttpRequestPtr& GenericRequest : ActiveRequests)
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{
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FAppleBackgroundHttpRequestPtr Request = StaticCastSharedPtr<FApplePlatformBackgroundHttpRequest>(GenericRequest);
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if (ensureAlwaysMsgf(Request.IsValid(), TEXT("Invalid Request Pointer in ActiveRequests list!")))
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{
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Request->UpdateProgress();
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}
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}
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}
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{
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FRWScopeLock PendingScopeRemoveRequestLock(PendingRemoveRequestLock, SLT_Write);
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for (FBackgroundHttpRequestPtr& GenericRequest : PendingRemoveRequests)
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{
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FAppleBackgroundHttpRequestPtr Request = StaticCastSharedPtr<FApplePlatformBackgroundHttpRequest>(GenericRequest);
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if (ensureAlwaysMsgf(Request.IsValid(), TEXT("Adding a non-Apple background request to our Apple Background Http Manager2! This is not supported or expected!")))
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{
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const uint64 DownloadId = Request->GetInternalDownloadId();
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FBackgroundURLSessionHandler::CancelDownload(DownloadId);
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Request->SetInternalDownloadId(FBackgroundURLSessionHandler::InvalidDownloadId);
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FBackgroundHttpManagerImpl::RemoveRequest(Request);
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}
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}
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PendingRemoveRequests.Empty();
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}
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FBackgroundURLSessionHandler::SaveBackgroundHttpFileHashHelperState();
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return true;
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}
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