diff options
Diffstat (limited to 'plugins/Dbx_tree/src/MappedMemory.cpp')
-rw-r--r-- | plugins/Dbx_tree/src/MappedMemory.cpp | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/plugins/Dbx_tree/src/MappedMemory.cpp b/plugins/Dbx_tree/src/MappedMemory.cpp deleted file mode 100644 index 7ced28a886..0000000000 --- a/plugins/Dbx_tree/src/MappedMemory.cpp +++ /dev/null @@ -1,142 +0,0 @@ -/*
-
-dbx_tree: tree database driver for Miranda IM
-
-Copyright 2007-2010 Michael "Protogenes" Kunz,
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-*/
-
-#include "Interface.h"
-#include "MappedMemory.h"
-#include "Logger.h"
-
-CMappedMemory::CMappedMemory(const TCHAR* FileName)
-: CFileAccess(FileName)
-{
- SYSTEM_INFO sysinfo;
-
- m_AllocSize = 0;
- m_DirectFile = 0;
- m_FileMapping = 0;
- m_Base = NULL;
-
- GetSystemInfo(&sysinfo);
- m_AllocGranularity = sysinfo.dwAllocationGranularity; // usually 64kb
- m_MinAllocGranularity = m_AllocGranularity; // must be at least one segment
- m_MaxAllocGranularity = m_AllocGranularity << 4; // usually 1mb for fast increasing
-
- m_DirectFile = CreateFile(FileName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, 0);
- if (m_DirectFile == INVALID_HANDLE_VALUE)
- LOGSYS(logCRITICAL, _T("CreateFile failed"));
-
- uint32_t size = GetFileSize(m_DirectFile, NULL);
- size = (size + m_AllocGranularity - 1) & ~(m_AllocGranularity - 1);
-
- if (size == 0)
- size = m_AllocGranularity;
-
- _SetSize(size);
- m_AllocSize = size;
-
- InitJournal();
-}
-
-CMappedMemory::~CMappedMemory()
-{
- if (m_Base)
- {
- FlushViewOfFile(m_Base, NULL);
- UnmapViewOfFile(m_Base);
- }
- if (m_FileMapping)
- CloseHandle(m_FileMapping);
-
- if (m_DirectFile)
- {
- if (INVALID_SET_FILE_POINTER != SetFilePointer(m_DirectFile, m_Size, NULL, FILE_BEGIN))
- SetEndOfFile(m_DirectFile);
-
- FlushFileBuffers(m_DirectFile);
- CloseHandle(m_DirectFile);
- }
-}
-
-
-uint32_t CMappedMemory::_Read(void* Buf, uint32_t Source, uint32_t Size)
-{
- memcpy(Buf, m_Base + Source, Size);
- return Size;
-}
-uint32_t CMappedMemory::_Write(void* Buf, uint32_t Dest, uint32_t Size)
-{
- memcpy(m_Base + Dest, Buf, Size);
- return Size;
-}
-
-uint32_t CMappedMemory::_SetSize(uint32_t Size)
-{
- if (m_Base)
- {
- FlushViewOfFile(m_Base, 0);
- UnmapViewOfFile(m_Base);
- }
- if (m_FileMapping)
- CloseHandle(m_FileMapping);
-
- m_Base = NULL;
- m_FileMapping = NULL;
-
- if (INVALID_SET_FILE_POINTER == SetFilePointer(m_DirectFile, Size, NULL, FILE_BEGIN))
- {
- LOGSYS(logERROR, _T("SetFilePointer failed"));
- return 0;
- }
-
- if (!SetEndOfFile(m_DirectFile))
- {
- LOGSYS(logERROR, _T("Cannot set end of file"));
- return 0;
- }
-
- m_FileMapping = CreateFileMappingA(m_DirectFile, NULL, PAGE_READWRITE, 0, Size, NULL);
-
- if (!m_FileMapping)
- {
- LOGSYS(logERROR, _T("CreateFileMapping failed"));
- return 0;
- }
-
- m_Base = (uint8_t*)MapViewOfFile(m_FileMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
- if (!m_Base)
- {
- LOGSYS(logERROR, _T("MapViewOfFile failed"));
- return 0;
- }
-
- return Size;
-}
-
-void CMappedMemory::_Invalidate(uint32_t Dest, uint32_t Size)
-{
- memset(m_Base + Dest, 0, Size);
-}
-
-void CMappedMemory::_Flush()
-{
- FlushViewOfFile(m_Base, NULL);
- FlushFileBuffers(m_DirectFile);
-}
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