Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Do not attempt to extend the temp file if VFS version 3 is not supported and hence memory mapped I/O is unavailable. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
3ab20ba14f0204efeec62c7dbb87cb3f |
| User & Date: | drh 2014-09-19 19:43:20 |
Context
|
2014-09-19
| ||
| 20:13 | Fix the affinity on inserts into the ANALYZE tables. Change the affinity characters to be upper case, to make the P5 parameter of comparison operators easier to read. check-in: 3f3ca76a user: drh tags: trunk | |
| 19:43 | Do not attempt to extend the temp file if VFS version 3 is not supported and hence memory mapped I/O is unavailable. check-in: 3ab20ba1 user: drh tags: trunk | |
| 19:00 | Make the "nolock" VFS on unix a version-3 VFS so that the sorter can use memory-mapped I/O. check-in: 3db78d61 user: drh tags: trunk | |
Changes
Changes to src/vdbesort.c.
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 |
** attempts to extend the file to nByte bytes in size and to ensure that
** the VFS has memory mapped it.
**
** Whether or not the file does end up memory mapped of course depends on
** the specific VFS implementation.
*/
static void vdbeSorterExtendFile(sqlite3 *db, sqlite3_file *pFd, i64 nByte){
if( nByte<=(i64)(db->nMaxSorterMmap) ){
int rc = sqlite3OsTruncate(pFd, nByte);
if( rc==SQLITE_OK && pFd->pMethods->iVersion>=3 ){
void *p = 0;
sqlite3OsFetch(pFd, 0, (int)nByte, &p);
sqlite3OsUnfetch(pFd, 0, p);
}
}
}
#else
|
| | |
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 |
** attempts to extend the file to nByte bytes in size and to ensure that
** the VFS has memory mapped it.
**
** Whether or not the file does end up memory mapped of course depends on
** the specific VFS implementation.
*/
static void vdbeSorterExtendFile(sqlite3 *db, sqlite3_file *pFd, i64 nByte){
if( nByte<=(i64)(db->nMaxSorterMmap) && pFd->pMethods->iVersion>=3 ){
int rc = sqlite3OsTruncate(pFd, nByte);
if( rc==SQLITE_OK ){
void *p = 0;
sqlite3OsFetch(pFd, 0, (int)nByte, &p);
sqlite3OsUnfetch(pFd, 0, p);
}
}
}
#else
|