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Overview
| Comment: | Transform two #ifdef statements into #if statements. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | batch-atomic-write |
| Files: | files | file ages | folders |
| SHA3-256: | f2c6b5845028ef25dcd17e23e11b93c9 |
| User & Date: | drh 2017-07-20 21:01:53 |
Context
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2017-07-20
| ||
| 21:18 | Add the documentation text for the new VFS interfaces used by batch-atomic writes. check-in: 5e944eea user: drh tags: batch-atomic-write | |
| 21:01 | Transform two #ifdef statements into #if statements. check-in: f2c6b584 user: drh tags: batch-atomic-write | |
| 21:00 | Split SQLITE_ENABLE_ATOMIC_WRITE into two options - the original and SQLITE_ENABLE_BATCH_ATOMIC_WRITE. check-in: 7eb9bf2c user: dan tags: batch-atomic-write | |
Changes
Changes to src/memjournal.c.
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){
MemJournal *p = (MemJournal *)pJfd;
u8 *zOut = zBuf;
int nRead = iAmt;
int iChunkOffset;
FileChunk *pChunk;
#ifdef SQLITE_ENABLE_ATOMIC_WRITE \
|| defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
if( (iAmt+iOfst)>p->endpoint.iOffset ){
return SQLITE_IOERR_SHORT_READ;
}
#endif
assert( (iAmt+iOfst)<=p->endpoint.iOffset );
................................................................................
else{
/* An in-memory journal file should only ever be appended to. Random
** access writes are not required. The only exception to this is when
** the in-memory journal is being used by a connection using the
** atomic-write optimization. In this case the first 28 bytes of the
** journal file may be written as part of committing the transaction. */
assert( iOfst==p->endpoint.iOffset || iOfst==0 );
#ifdef SQLITE_ENABLE_ATOMIC_WRITE \
|| defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
if( iOfst==0 && p->pFirst ){
assert( p->nChunkSize>iAmt );
memcpy((u8*)p->pFirst->zChunk, zBuf, iAmt);
}else
#else
assert( iOfst>0 || p->pFirst==0 );
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){
MemJournal *p = (MemJournal *)pJfd;
u8 *zOut = zBuf;
int nRead = iAmt;
int iChunkOffset;
FileChunk *pChunk;
#if defined(SQLITE_ENABLE_ATOMIC_WRITE) \
|| defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
if( (iAmt+iOfst)>p->endpoint.iOffset ){
return SQLITE_IOERR_SHORT_READ;
}
#endif
assert( (iAmt+iOfst)<=p->endpoint.iOffset );
................................................................................
else{
/* An in-memory journal file should only ever be appended to. Random
** access writes are not required. The only exception to this is when
** the in-memory journal is being used by a connection using the
** atomic-write optimization. In this case the first 28 bytes of the
** journal file may be written as part of committing the transaction. */
assert( iOfst==p->endpoint.iOffset || iOfst==0 );
#if defined(SQLITE_ENABLE_ATOMIC_WRITE) \
|| defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
if( iOfst==0 && p->pFirst ){
assert( p->nChunkSize>iAmt );
memcpy((u8*)p->pFirst->zChunk, zBuf, iAmt);
}else
#else
assert( iOfst>0 || p->pFirst==0 );
|