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Enhance the WAL header sync so that it honors the various synchronous

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pragmas, settings, and device characteristics.

FossilOrigin-Name: 9799241f7de952c4d1ea8bf6508b577d2b57a370
This commit is contained in:
drh
2011-12-16 21:26:26 +00:00
parent 88f975a7a4
commit 4eb02a4556
7 changed files with 89 additions and 54 deletions
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6
src/wal.h
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@@ -87,6 +87,12 @@ int sqlite3WalSavepointUndo(Wal *pWal, u32 *aWalData);
/* Write a frame or frames to the log. */
int sqlite3WalFrames(Wal *pWal, int, PgHdr *, Pgno, int, int);
/* Additional values that can be added to the sync_flags argument of
** sqlite3WalFrames():
*/
#define WAL_SYNC_TRANSACTIONS 0x20 /* Sync at the end of each transaction */
#define SQLITE_SYNC_MASK 0x13 /* Mask off the SQLITE_SYNC_* values */
/* Copy pages from the log to the database file */
int sqlite3WalCheckpoint(
Wal *pWal, /* Write-ahead log connection */