diff options
Diffstat (limited to 'plugins/Dbx_mmap_SA/dbcache.cpp')
| -rw-r--r-- | plugins/Dbx_mmap_SA/dbcache.cpp | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/plugins/Dbx_mmap_SA/dbcache.cpp b/plugins/Dbx_mmap_SA/dbcache.cpp deleted file mode 100644 index 1e5764ae22..0000000000 --- a/plugins/Dbx_mmap_SA/dbcache.cpp +++ /dev/null @@ -1,194 +0,0 @@ -/*
-
-Miranda IM: the free IM client for Microsoft* Windows*
-
-Copyright 2000-2003 Miranda ICQ/IM project,
-all portions of this codebase are copyrighted to the people
-listed in contributors.txt.
-
-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 "commonheaders.h"
-
-BOOL safetyMode = TRUE;
-static UINT_PTR flushBuffersTimerId;
-
-static PBYTE pNull = 0;
-static PBYTE pDbCache = NULL;
-static HANDLE hMap = NULL;
-static DWORD dwFileSize = 0;
-static DWORD ChunkSize = 65536;
-static DWORD flushFailTick = 0;
-
-
-void Map()
-{
- hMap = CreateFileMapping(hDbFile, NULL, PAGE_READWRITE, 0, dwFileSize, NULL);
-
- if (hMap)
- {
- pDbCache = (PBYTE)MapViewOfFile(hMap, FILE_MAP_ALL_ACCESS/*FILE_MAP_WRITE*/, 0, 0 ,0);
- if (!pDbCache)
- DatabaseCorruption( _T("%s (MapViewOfFile failed. Code: %d)"));
- }
- else
- DatabaseCorruption( _T("%s (CreateFileMapping failed. Code: %d)"));
-}
-
-void ReMap(DWORD needed)
-{
- KillTimer(NULL,flushBuffersTimerId);
-
- log3("remapping %d + %d (file end: %d)",dwFileSize,needed,dbHeader.ofsFileEnd);
-
- if (needed > ChunkSize)
- {
- if (needed + dwFileSize > dbHeader.ofsFileEnd + ChunkSize)
- DatabaseCorruption( _T("%s (Too large increment)"));
- else
- {
- DWORD x = dbHeader.ofsFileEnd/ChunkSize;
- dwFileSize = (x+1)*ChunkSize;
- }
- }
- else
- dwFileSize += ChunkSize;
-
-// FlushViewOfFile(pDbCache, 0);
- UnmapViewOfFile(pDbCache);
- pDbCache = NULL;
- CloseHandle(hMap);
-
- Map();
-}
-
-void DBMoveChunk(DWORD ofsDest,DWORD ofsSource,int bytes)
-{
- int x = 0;
- log3("move %d %08x->%08x",bytes,ofsSource,ofsDest);
- if (ofsDest+bytes>dwFileSize) ReMap(ofsDest+bytes-dwFileSize);
- if (ofsSource+bytes>dwFileSize) {
- x = ofsSource+bytes-dwFileSize;
- log0("buggy move!");
- _ASSERT(0);
- }
- if (x > 0)
- ZeroMemory(pDbCache+ofsDest+bytes-x, x);
- if (ofsSource < dwFileSize)
- MoveMemory(pDbCache+ofsDest,pDbCache+ofsSource, bytes-x);
-
- logg();
-}
-
-//we are assumed to be in a mutex here
-PBYTE DBRead(DWORD ofs,int bytesRequired,int *bytesAvail)
-{
- // buggy read
- if (ofs>=dwFileSize) {
- log2("read from outside %d@%08x",bytesRequired,ofs);
- if (bytesAvail!=NULL) *bytesAvail = ChunkSize;
- return pNull;
- }
- log3((ofs+bytesRequired>dwFileSize)?"read %d@%08x, only %d avaliable":"read %d@%08x",bytesRequired,ofs,dwFileSize-ofs);
- if (bytesAvail!=NULL) *bytesAvail = dwFileSize - ofs;
- return pDbCache+ofs;
-}
-
-//we are assumed to be in a mutex here
-void DBWrite(DWORD ofs,PVOID pData,int bytes)
-{
- log2("write %d@%08x",bytes,ofs);
- if (ofs+bytes>dwFileSize) ReMap(ofs+bytes-dwFileSize);
- MoveMemory(pDbCache+ofs,pData,bytes);
- logg();
-}
-
-//we are assumed to be in a mutex here
-void DBFill(DWORD ofs,int bytes)
-{
- log2("zerofill %d@%08x",bytes,ofs);
- if (ofs+bytes <= dwFileSize)
- ZeroMemory(pDbCache+ofs,bytes);
- logg();
-}
-
-static VOID CALLBACK DoBufferFlushTimerProc(HWND hwnd, UINT message, UINT_PTR idEvent, DWORD dwTime)
-{
- if (!pDbCache) return;
-
- KillTimer(NULL,flushBuffersTimerId);
- log0("tflush1");
- if (FlushViewOfFile(pDbCache, 0) == 0) {
- if (flushFailTick == 0)
- flushFailTick = GetTickCount();
- else if (GetTickCount() - flushFailTick > 5000)
- DatabaseCorruption(NULL);
- }
- else
- flushFailTick = 0;
- log0("tflush2");
-}
-
-void DBFlush(int setting)
-{
- if (!setting) {
- log0("nflush1");
- if (safetyMode && pDbCache) {
- if (FlushViewOfFile(pDbCache, 0) == 0) {
- if (flushFailTick == 0)
- flushFailTick = GetTickCount();
- else if (GetTickCount() - flushFailTick > 5000)
- DatabaseCorruption(NULL);
- }
- else
- flushFailTick = 0;
- }
- log0("nflush2");
- return;
- }
- KillTimer(NULL,flushBuffersTimerId);
- flushBuffersTimerId = SetTimer(NULL,flushBuffersTimerId,50,DoBufferFlushTimerProc);
-}
-
-int InitCache(void)
-{
- DWORD x;
- SYSTEM_INFO sinf;
-
- GetSystemInfo(&sinf);
- ChunkSize = sinf.dwAllocationGranularity;
-
- dwFileSize = GetFileSize(hDbFile, NULL);
-
- // Align to chunk
- x = dwFileSize % ChunkSize;
- if (x) dwFileSize += ChunkSize - x;
-
- Map();
-
- // zero region for reads outside the file
- pNull = (PBYTE)calloc(ChunkSize, 1);
- return 0;
-}
-
-void UninitCache(void)
-{
- KillTimer(NULL,flushBuffersTimerId);
- FlushViewOfFile(pDbCache, 0);
- UnmapViewOfFile(pDbCache);
- CloseHandle(hMap);
- if (pNull) free(pNull);
-}
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