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Add experimental mode that uses two wal files. Activated using "PRAGMA

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journal_mode = wal2".

FossilOrigin-Name: e2fc5c814cf6862d536aacb9eca66ecd31ba7e3e3033fa4c5564d533f4a18dfc
This commit is contained in:
dan
2017-10-04 20:57:14 +00:00
parent c6aa38159b
commit 055cc1e431
15 changed files with 1367 additions and 586 deletions
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4
src/wal.h
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@@ -26,7 +26,7 @@
#define CKPT_SYNC_FLAGS(X) (((X)>>2)&0x03)
#ifdef SQLITE_OMIT_WAL
# define sqlite3WalOpen(x,y,z) 0
# define sqlite3WalOpen(w,x,y,z) 0
# define sqlite3WalLimit(x,y)
# define sqlite3WalClose(v,w,x,y,z) 0
# define sqlite3WalBeginReadTransaction(y,z) 0
@@ -55,7 +55,7 @@
typedef struct Wal Wal;
/* Open and close a connection to a write-ahead log. */
int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *, int, i64, Wal**);
int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *,int,i64,int,Wal**);
int sqlite3WalClose(Wal *pWal, sqlite3*, int sync_flags, int, u8 *);
/* Set the limiting size of a WAL file. */