OW32: IoCompletion.h Source File

00001 /*  IoCompletion.h- Io Completion Port handling mechanism
00002     Copyright (C) 2001-2004 Mark Weaver
00003     Written by Mark Weaver <mark@npsl.co.uk>
00004 
00005     Part of the Open-Win32 library.
00006     This library is free software; you can redistribute it and/or
00007     modify it under the terms of the GNU Library General Public
00008     License as published by the Free Software Foundation; either
00009     version 2 of the License, or (at your option) any later version.
00010 
00011     This library is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014     Library General Public License for more details.
00015 
00016     You should have received a copy of the GNU Library General Public
00017     License along with this library; if not, write to the
00018     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00019     Boston, MA  02111-1307, USA.
00020 */
00021 
00026 #ifndef OW32_IoCompletion_h
00027 #define OW32_IoCompletion_h
00028 
00029 #include <OW32/windows.h>
00030 #include <OW32/OW32Libs.h>
00031 
00032 namespace OW32
00033 {
00034 
00036 class OW32_LIB_EXPORT CIoCompletion
00037 {
00038 public:
00045     virtual void OnIoCompletion(BOOL bRet, DWORD dwBytes, LPOVERLAPPED lpOS) = 0;
00046 };
00047 
00052 #define DLL_IMPLEMENT_IO_COMPLETION(className, declspec) \
00053     typedef void (className::*CompletionFn)(BOOL bRet, DWORD dwBytes, LPOVERLAPPED lpOS); \
00054     \
00055  \
00056     struct declspec OVERLAPPEDPLUS : public OVERLAPPED \
00057     { \
00058  \
00059         CompletionFn lpCompletion; \
00060     }; \
00061     \
00062     virtual void OnIoCompletion(BOOL bRet, DWORD dwBytes, LPOVERLAPPED lpOS) \
00063     { \
00064         OVERLAPPEDPLUS* lpOSPlus = (OVERLAPPEDPLUS*)lpOS; \
00065         (this->*(lpOSPlus->lpCompletion))(bRet, dwBytes, lpOS); \
00066     }
00067 
00071 #define IMPLEMENT_IO_COMPLETION(className) \
00072     typedef void (className::*CompletionFn)(BOOL bRet, DWORD dwBytes, LPOVERLAPPED lpOS); \
00073     \
00074  \
00075     struct OVERLAPPEDPLUS : public OVERLAPPED \
00076     { \
00077  \
00078         CompletionFn lpCompletion; \
00079     }; \
00080     \
00081     virtual void OnIoCompletion(BOOL bRet, DWORD dwBytes, LPOVERLAPPED lpOS) \
00082     { \
00083         OVERLAPPEDPLUS* lpOSPlus = (OVERLAPPEDPLUS*)lpOS; \
00084         (this->*(lpOSPlus->lpCompletion))(bRet, dwBytes, lpOS); \
00085     }
00086 
00087 } // namespace OW32
00088 
00089 #endif // OW32_IoCompletion_h