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Overview
| Comment: | Simplification to the posix_fallocate() replacement used for the SQLITE_FCNTL_SIZE_HINT file control in the unix VFS. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
74934d3f60ad9f6550297410eada0f28 |
| User & Date: | drh 2015-12-01 22:09:42 |
Context
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2015-12-02
| ||
| 00:05 | Remove all traces of SQLITE_FCNTL_WAL_BLOCK from the unix VFS - that feature had been disabled for a long time and never actually worked. check-in: e1d5320c user: drh tags: trunk | |
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2015-12-01
| ||
| 22:09 | Simplification to the posix_fallocate() replacement used for the SQLITE_FCNTL_SIZE_HINT file control in the unix VFS. check-in: 74934d3f user: drh tags: trunk | |
| 21:23 | Add the SQLITE_LIKE_DOESNT_MATCH_BLOBS compile-time option. check-in: 9e1d6d4c user: drh tags: trunk | |
Changes
Changes to src/os_unix.c.
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** This is a similar technique to that used by glibc on systems
** that do not have a real fallocate() call.
*/
int nBlk = buf.st_blksize; /* File-system block size */
int nWrite = 0; /* Number of bytes written by seekAndWrite */
i64 iWrite; /* Next offset to write to */
iWrite = ((buf.st_size + 2*nBlk - 1)/nBlk)*nBlk-1;
assert( iWrite>=buf.st_size );
assert( (iWrite/nBlk)==((buf.st_size+nBlk-1)/nBlk) );
assert( ((iWrite+1)%nBlk)==0 );
for(/*no-op*/; iWrite<nSize; iWrite+=nBlk ){
nWrite = seekAndWrite(pFile, iWrite, "", 1);
if( nWrite!=1 ) return SQLITE_IOERR_WRITE;
}
if( nWrite==0 || (nSize%nBlk) ){
nWrite = seekAndWrite(pFile, nSize-1, "", 1);
if( nWrite!=1 ) return SQLITE_IOERR_WRITE;
}
#endif
}
}
#if SQLITE_MAX_MMAP_SIZE>0
if( pFile->mmapSizeMax>0 && nByte>pFile->mmapSize ){
int rc;
|
| < | > < < < < |
3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 |
** This is a similar technique to that used by glibc on systems
** that do not have a real fallocate() call.
*/
int nBlk = buf.st_blksize; /* File-system block size */
int nWrite = 0; /* Number of bytes written by seekAndWrite */
i64 iWrite; /* Next offset to write to */
iWrite = (buf.st_size/nBlk)*nBlk + nBlk - 1;
assert( iWrite>=buf.st_size );
assert( ((iWrite+1)%nBlk)==0 );
for(/*no-op*/; iWrite<nSize+nBlk-1; iWrite+=nBlk ){
if( iWrite>=nSize ) iWrite = nSize - 1;
nWrite = seekAndWrite(pFile, iWrite, "", 1);
if( nWrite!=1 ) return SQLITE_IOERR_WRITE;
}
#endif
}
}
#if SQLITE_MAX_MMAP_SIZE>0
if( pFile->mmapSizeMax>0 && nByte>pFile->mmapSize ){
int rc;
|