1 /*- 2 * See the file LICENSE for redistribution information. 3 * 4 * Copyright (c) 2012, 2013 Oracle and/or its affiliates. All rights reserved. 5 */ 6 7 #include <db.h> 8 9 /* Avoid a name clash */ 10 #undef DB_TIMEOUT 11 12 typedef struct Pager Pager; 13 typedef struct PgHdr DbPage; 14 typedef db_pgno_t Pgno; 15 16 /* 17 ** Allowed values for the flags parameter to sqlite3PagerOpen(). 18 ** 19 ** NOTE: These values must match the corresponding BTREE_ values in btree.h. 20 */ 21 #define PAGER_OMIT_JOURNAL 0x0001 /* Do not use a rollback journal */ 22 #define PAGER_NO_READLOCK 0x0002 /* Omit readlocks on readonly files */ 23 24 /* 25 ** Valid values for the second argument to sqlite3PagerLockingMode(). 26 */ 27 #define PAGER_LOCKINGMODE_QUERY -1 28 #define PAGER_LOCKINGMODE_NORMAL 0 29 #define PAGER_LOCKINGMODE_EXCLUSIVE 1 30 31 /* 32 ** Valid values for the second argument to sqlite3PagerJournalMode(). 33 */ 34 #define PAGER_JOURNALMODE_QUERY -1 35 #define PAGER_JOURNALMODE_DELETE 0 /* Commit by deleting journal file */ 36 #define PAGER_JOURNALMODE_PERSIST 1 /* Commit by zeroing journal header */ 37 #define PAGER_JOURNALMODE_OFF 2 /* Journal omitted. */ 38 #define PAGER_JOURNALMODE_TRUNCATE 3 /* Commit by truncating journal */ 39 #define PAGER_JOURNALMODE_MEMORY 4 /* In-memory journal file */ 40 #define PAGER_JOURNALMODE_WAL 5 /* Use write-ahead logging */ 41 42 /* 43 ** Default maximum size for log files. This value may be overridden using the 44 ** sqlite3PagerJournalSizeLimit() API. See also "PRAGMA journal_size_limit". 45 */ 46 #ifndef SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT 47 #define SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT 2 * 1024 * 1024 48 #endif 49 50 int sqlite3PagerExclusiveLock(Pager *pPager); 51 sqlite3_file *sqlite3PagerFile(Pager*); 52 const char *sqlite3PagerFilename(Pager *pPager); 53 int sqlite3PagerGetJournalMode(Pager *pPager); 54 int sqlite3PagerIsMemdb(Pager*); 55 int sqlite3PagerJournalMode(Pager *, int); 56 i64 sqlite3PagerJournalSizeLimit(Pager *, i64); 57 int sqlite3PagerLockingMode(Pager *, int); 58 int sqlite3PagerMemUsed(Pager *pPager); 59 int sqlite3PagerOkToChangeJournalMode(Pager *pPager); 60 int sqlite3PagerPagecount(Pager*, int*); 61 int sqlite3PagerSetJournalMode(Pager *pPager, int eMode); 62 63 #ifndef SQLITE_OMIT_WAL 64 int sqlite3PagerWalCallback(Pager *pPager); 65 int sqlite3PagerCheckpoint(Pager *pPager); 66 int sqlite3PagerCloseWal(Pager *pPager); 67 int sqlite3PagerWalSupported(Pager *pPager); 68 #endif 69 70 #define disable_simulated_io_errors() 71 #define enable_simulated_io_errors() 72 #ifdef SQLITE_TEST 73 int *sqlite3PagerStats(Pager*); 74 #endif 75