diff options
Diffstat (limited to 'plugins/Db3x_mmap/src/dbcache.cpp')
| -rw-r--r-- | plugins/Db3x_mmap/src/dbcache.cpp | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/plugins/Db3x_mmap/src/dbcache.cpp b/plugins/Db3x_mmap/src/dbcache.cpp index f047af0a1b..b91362bf3b 100644 --- a/plugins/Db3x_mmap/src/dbcache.cpp +++ b/plugins/Db3x_mmap/src/dbcache.cpp @@ -25,9 +25,17 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. void CDb3Base::Map()
{
- m_hMap = CreateFileMapping(m_hDbFile, NULL, (m_bReadOnly) ? PAGE_WRITECOPY : PAGE_READWRITE, 0, m_dwFileSize, NULL);
+ DWORD dwProtectMode, dwAccess;
+ if (cb && cb->bAggressive)
+ dwProtectMode = PAGE_WRITECOPY, dwAccess = FILE_MAP_COPY;
+ else if (m_bReadOnly)
+ dwProtectMode = PAGE_READONLY, dwAccess = FILE_MAP_READ;
+ else
+ dwProtectMode = PAGE_READWRITE, dwAccess = FILE_MAP_ALL_ACCESS;
+
+ m_hMap = CreateFileMapping(m_hDbFile, NULL, dwProtectMode, 0, m_dwFileSize, NULL);
if (m_hMap) {
- m_pDbCache = (PBYTE)MapViewOfFile(m_hMap, (m_bReadOnly) ? FILE_MAP_COPY : FILE_MAP_ALL_ACCESS, 0, 0, 0);
+ m_pDbCache = (PBYTE)MapViewOfFile(m_hMap, dwAccess, 0, 0, 0);
if (!m_pDbCache)
DatabaseCorruption( _T("%s (MapViewOfFile failed. Code: %d)"));
}
@@ -40,17 +48,18 @@ void CDb3Base::ReMap(DWORD needed) log3("remapping %d + %d (file end: %d)",m_dwFileSize,needed,m_dbHeader.ofsFileEnd);
- if (needed > m_ChunkSize) {
- if (needed + m_dwFileSize > m_dbHeader.ofsFileEnd + m_ChunkSize)
- DatabaseCorruption( _T("%s (Too large increment)"));
- else {
- DWORD x = m_dbHeader.ofsFileEnd/m_ChunkSize;
- m_dwFileSize = (x+1)*m_ChunkSize;
+ if (needed > 0) {
+ if (needed > m_ChunkSize) {
+ if (needed + m_dwFileSize > m_dbHeader.ofsFileEnd + m_ChunkSize)
+ DatabaseCorruption(_T("%s (Too large increment)"));
+ else {
+ DWORD x = m_dbHeader.ofsFileEnd/m_ChunkSize;
+ m_dwFileSize = (x+1)*m_ChunkSize;
+ }
}
+ else m_dwFileSize += m_ChunkSize;
}
- else m_dwFileSize += m_ChunkSize;
-// FlushViewOfFile(m_pDbCache, 0);
UnmapViewOfFile(m_pDbCache);
m_pDbCache = NULL;
CloseHandle(m_hMap);
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