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9b466aca72
- DW now returns correct paths for changes in subdirectory (UE-11861) - DW will now automatically watch for changes in the whole tree, updating mapping when directories are added/deleted. - DW now honors bIncludeDirectoryChanges option. - Code has been hardened (should handle overflow and other failures). - This change Incorporates parts from PR #1139 by 3dluvr (UE-15443) . - Passes TestPAL and automation tests. [CL 2549034 by Dmitry Rekman in Main branch]
92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/inotify.h>
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#define EVENT_SIZE ( sizeof (struct inotify_event) )
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#define EVENT_BUF_LEN ( 1024 * ( EVENT_SIZE + 16 ) )
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class FDirectoryWatchRequestLinux
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{
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public:
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/**
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* Template class to support FString to TValueType maps with a case sensitive key
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*/
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template<typename TValueType>
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struct FCaseSensitiveLookupKeyFuncs : BaseKeyFuncs<TValueType, FString>
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{
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static FORCEINLINE const FString& GetSetKey(const TPair<FString, TValueType>& Element)
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{
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return Element.Key;
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}
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static FORCEINLINE bool Matches(const FString& A, const FString& B)
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{
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return A.Equals(B, ESearchCase::CaseSensitive);
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}
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static FORCEINLINE uint32 GetKeyHash(const FString& Key)
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{
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return FCrc::StrCrc32<TCHAR>(*Key);
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}
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};
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FDirectoryWatchRequestLinux();
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virtual ~FDirectoryWatchRequestLinux();
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/** Sets up the directory handle and request information */
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bool Init(const FString& InDirectory, bool bInIncludeDirectoryChanges);
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/** Adds a delegate to get fired when the directory changes */
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FDelegateHandle AddDelegate( const IDirectoryWatcher::FDirectoryChanged& InDelegate );
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/** Removes a delegate to get fired when the directory changes */
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DELEGATE_DEPRECATED("This overload of RemoveDelegate is deprecated, instead pass the result of AddDelegate.")
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bool RemoveDelegate( const IDirectoryWatcher::FDirectoryChanged& InDelegate );
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/** Same as above, but for use within other deprecated calls to prevent multiple deprecation warnings */
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bool DEPRECATED_RemoveDelegate( const IDirectoryWatcher::FDirectoryChanged& InDelegate );
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/** Removes a delegate to get fired when the directory changes */
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bool RemoveDelegate( FDelegateHandle InHandle );
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/** Returns true if this request has any delegates listening to directory changes */
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bool HasDelegates() const;
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/** Prepares the request for deletion */
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void EndWatchRequest();
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/** Triggers all pending file change notifications */
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void ProcessPendingNotifications();
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private:
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/** Adds watches for all files (and subdirectories) in a directory. */
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void WatchDirectoryTree(const FString & RootAbsolutePath);
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/** Removes all watches from a */
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void UnwatchDirectoryTree(const FString & RootAbsolutePath);
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FString Directory;
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bool bRunning;
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bool bEndWatchRequestInvoked;
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/** Whether to report directory creation/deletion changes. */
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bool bIncludeDirectoryChanges;
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int FileDescriptor;
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/** Mapping from watch descriptors to their path names */
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TMap<int32, FString> WatchDescriptorsToPaths;
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/** Mapping from paths to watch descriptors */
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TMap<FString, int32, FDefaultSetAllocator, FCaseSensitiveLookupKeyFuncs<int32>> PathsToWatchDescriptors;
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int NotifyFilter;
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TArray<IDirectoryWatcher::FDirectoryChanged> Delegates;
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TArray<FFileChangeData> FileChanges;
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void Shutdown();
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void ProcessChanges();
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};
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