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Enhance WAL mode so that the WAL file honors the journal size limit set

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by PRAGMA journal_size_limit.

FossilOrigin-Name: db7e500f69faf1906a84991ba67d26a195f02ae5
This commit is contained in:
drh
2011-05-16 21:00:27 +00:00
parent 99a66928c2
commit 85a8375580
6 changed files with 162 additions and 11 deletions
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6
src/wal.h
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@@ -21,6 +21,7 @@
#ifdef SQLITE_OMIT_WAL
# define sqlite3WalOpen(x,y,z) 0
# define sqlite3WalLimit(x,y)
# define sqlite3WalClose(w,x,y,z) 0
# define sqlite3WalBeginReadTransaction(y,z) 0
# define sqlite3WalEndReadTransaction(z)
@@ -46,9 +47,12 @@
typedef struct Wal Wal;
/* Open and close a connection to a write-ahead log. */
int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *zName, int, Wal**);
int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *, int, i64, Wal**);
int sqlite3WalClose(Wal *pWal, int sync_flags, int, u8 *);
/* Set the limiting size of a WAL file. */
void sqlite3WalLimit(Wal*, i64);
/* Used by readers to open (lock) and close (unlock) a snapshot. A
** snapshot is like a read-transaction. It is the state of the database
** at an instant in time. sqlite3WalOpenSnapshot gets a read lock and