71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#ifndef FILECHANGEWATCHER_H
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#define FILECHANGEWATCHER_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier1/utlvector.h"
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//-----------------------------------------------------------------------------
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// Purpose: This class provides notifications of changes in directories.
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// Call AddDirectory to tell it which directories to watch, then
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// call Update() periodically to check for updates.
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//-----------------------------------------------------------------------------
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class CFileChangeWatcher
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{
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public:
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class ICallbacks
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{
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public:
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// Note: this is called if the file is added, removed, or modified. It's up to the app to figure out
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// what it wants to do with the change.
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virtual void OnFileChange( const char *pRelativeFilename, const char *pFullFilename ) = 0;
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};
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CFileChangeWatcher();
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~CFileChangeWatcher();
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void Init( ICallbacks *pCallbacks );
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// pSearchPathBase would be like "c:\valve\hl2" and pDirName would be like "materials".
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bool AddDirectory( const char *pSearchPathBase, const char *pDirName, bool bRecursive );
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void Term();
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// Call this periodically to update. It'll call your ICallbacks functions for anything it finds.
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// Returns the number of updates it got.
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int Update();
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private:
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class CDirWatch
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{
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public:
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char m_SearchPathBase[MAX_PATH];
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char m_DirName[MAX_PATH];
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char m_FullDirName[MAX_PATH];
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OVERLAPPED m_Overlapped;
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HANDLE m_hEvent;
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HANDLE m_hDir; // Created with CreateFile.
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char m_Buffer[1024 * 16];
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};
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void SendNotification( CFileChangeWatcher::CDirWatch *pDirWatch, const char *pRelativeFilename );
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BOOL CallReadDirectoryChanges( CFileChangeWatcher::CDirWatch *pDirWatch );
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private:
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// Override these.
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CUtlVector<CDirWatch*> m_DirWatches;
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ICallbacks *m_pCallbacks;
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};
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#endif // FILECHANGEWATCHER_H
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