4415 static int winMapfile(winFile *pFd, sqlite3_int64 nByte){  argument
4419   assert( nMap>=0 || pFd->nFetchOut==0 );
4421            osGetCurrentProcessId(), pFd, nByte));
4423   if( pFd->nFetchOut>0 ) return SQLITE_OK;
4426     rc = winFileSize((sqlite3_file*)pFd, &nMap);
4429                osGetCurrentProcessId(), pFd));
4433   if( nMap>pFd->mmapSizeMax ){
4434     nMap = pFd->mmapSizeMax;
4438   if( nMap==0 && pFd->mmapSize>0 ){
4439     winUnmapfile(pFd);
4441   if( nMap!=pFd->mmapSize ){
4446     winUnmapfile(pFd);
4448     if( (pFd->ctrlFlags & WINFILE_RDONLY)==0 ){
4454     pFd->hMap = osCreateFileMappingFromApp(pFd->h, NULL, protect, nMap, NULL);
4456     pFd->hMap = osCreateFileMappingW(pFd->h, NULL, protect,
4460     pFd->hMap = osCreateFileMappingA(pFd->h, NULL, protect,
4464     if( pFd->hMap==NULL ){
4465       pFd->lastErrno = osGetLastError();
4466       rc = winLogError(SQLITE_IOERR_MMAP, pFd->lastErrno,
4467                        "winMapfile1", pFd->zPath);
4470                osGetCurrentProcessId(), pFd, sqlite3ErrName(rc)));
4476     pNew = osMapViewOfFileFromApp(pFd->hMap, flags, 0, (SIZE_T)nMap);
4478     pNew = osMapViewOfFile(pFd->hMap, flags, 0, 0, (SIZE_T)nMap);
4481       osCloseHandle(pFd->hMap);
4482       pFd->hMap = NULL;
4483       pFd->lastErrno = osGetLastError();
4484       rc = winLogError(SQLITE_IOERR_MMAP, pFd->lastErrno,
4485                        "winMapfile2", pFd->zPath);
4488                osGetCurrentProcessId(), pFd, sqlite3ErrName(rc)));
4491     pFd->pMapRegion = pNew;
4492     pFd->mmapSize = nMap;
4496            osGetCurrentProcessId(), pFd));
4515   winFile *pFd = (winFile*)fd;   /* The underlying database file */  local
4523   if( pFd->mmapSizeMax>0 ){
4524     if( pFd->pMapRegion==0 ){
4525       int rc = winMapfile(pFd, -1);
4528                  osGetCurrentProcessId(), pFd, sqlite3ErrName(rc)));
4532     if( pFd->mmapSize >= iOff+nAmt ){
4533       assert( pFd->pMapRegion!=0 );
4534       *pp = &((u8 *)pFd->pMapRegion)[iOff];
4535       pFd->nFetchOut++;
4557   winFile *pFd = (winFile*)fd;   /* The underlying database file */  local
4562   assert( (p==0)==(pFd->nFetchOut==0) );
4565   assert( p==0 || p==&((u8 *)pFd->pMapRegion)[iOff] );
4568            osGetCurrentProcessId(), pFd, iOff, p));
4571     pFd->nFetchOut--;
4577     winUnmapfile(pFd);
4580   assert( pFd->nFetchOut>=0 );