database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-12 13:01:09 +03:00
Code Activity

Use mremap() on Linux.

Browse Source 
FossilOrigin-Name: 431aecc8600c29c203546e48d256510510238887
This commit is contained in:
dan
2013-03-25 20:30:13 +00:00
parent dee6554811
commit b7e3a326fe
3 changed files with 27 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
src/os_unix.c
View File

@@ -4544,21 +4544,28 @@ static int unixMapfile(unixFile *pFd, i64 nByte){
}
if( nMap!=pFd->mmapSize ){
unixUnmapfile(pFd);
void *pNew = 0;
if( nMap>0 ){
void *pNew;
int flags = PROT_READ;
if( (pFd->ctrlFlags & UNIXFILE_RDONLY)==0 ) flags |= PROT_WRITE;
pNew = osMmap(0, nMap, flags, MAP_SHARED, pFd->h, 0);
if( pNew==MAP_FAILED ){
return SQLITE_IOERR_MMAP;
#if defined(__linux__) && defined(_GNU_SOURCE)
if( pFd->pMapRegion && nMap>0 ){
pNew = mremap(pFd->pMapRegion, pFd->mmapOrigsize, nMap, MREMAP_MAYMOVE);
}else
#endif
{
unixUnmapfile(pFd);
if( nMap>0 ){
int flags = PROT_READ;
if( (pFd->ctrlFlags & UNIXFILE_RDONLY)==0 ) flags |= PROT_WRITE;
pNew = osMmap(0, nMap, flags, MAP_SHARED, pFd->h, 0);
}
pFd->pMapRegion = pNew;
pFd->mmapSize = nMap;
pFd->mmapOrigsize = nMap;
}
if( pNew==MAP_FAILED ){
return SQLITE_IOERR_MMAP;
}
pFd->pMapRegion = pNew;
pFd->mmapSize = nMap;
pFd->mmapOrigsize = nMap;
}
return SQLITE_OK;