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72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
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#ifndef NULLSOFT_WAC_DOWNLOAD_MANAGER_DOWNLOADCALLBACKT_H
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#define NULLSOFT_WAC_DOWNLOAD_MANAGER_DOWNLOADCALLBACKT_H
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#include "wac_downloadManager_api.h"
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#define WIN32_LEAN_AND_MEAN
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//#include <windows.h> // for InterlockedIncrememt/Decrement
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#include <atomic>
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/* DownloadCallbackT is reference counted for you. if you don't like that, inherit from ifc_downloadManagerCallback yourself */
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template <class T>
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class DownloadCallbackT : public ifc_downloadManagerCallback
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{
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public:
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size_t AddRef()
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{
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return _ref_count.fetch_add( 1 );
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}
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size_t Release()
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{
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if (_ref_count.load() == 0 )
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return _ref_count.load();
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LONG l_ref_count = _ref_count.fetch_sub( 1 );
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if ( !l_ref_count )
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delete( static_cast<T *>( this ) );
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return l_ref_count;
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}
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protected:
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DownloadCallbackT() {}
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void OnFinish( DownloadToken token ) { Release(); }
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void OnTick( DownloadToken token ) {}
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void OnError( DownloadToken token, int error ) { Release(); }
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void OnCancel( DownloadToken token ) { Release(); }
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void OnConnect( DownloadToken token ) {}
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void OnInit( DownloadToken token ) {}
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void OnData( DownloadToken token, void *data, size_t datalen ) {}
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int GetSource(wchar_t *source, size_t source_cch) { return 1;}
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int GetTitle(wchar_t *title, size_t title_cch) { return 1;}
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int GetLocation(wchar_t *location, size_t location_cch) { return 1;}
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#define CBCLASS T
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#define CBCLASST DownloadCallbackT<T>
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START_DISPATCH_INLINE;
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CBT(ADDREF, AddRef);
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CBT(RELEASE, Release);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONFINISH, OnFinish);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONTICK, OnTick);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONERROR, OnError);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONCANCEL, OnCancel);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONCONNECT, OnConnect);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONINIT, OnInit);
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VCBT(IFC_DOWNLOADMANAGERCALLBACK_ONDATA, OnData);
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CBT( IFC_DOWNLOADMANAGERCALLBACK_GETSOURCE, GetSource);
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CBT( IFC_DOWNLOADMANAGERCALLBACK_GETTITLE, GetTitle);
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CBT( IFC_DOWNLOADMANAGERCALLBACK_GETLOCATION, GetLocation);
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END_DISPATCH;
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#undef CBCLASS
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#undef CBCLASST
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private:
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std::atomic<std::size_t> _ref_count;
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};
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#endif // !NULLSOFT_WAC_DOWNLOAD_MANAGER_DOWNLOADCALLBACKT_H
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