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Overview
| Comment: | Separate multiplexor overflow pages for -wal and -journal files into separate namespaces when in 8+3 filename mode. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
d6850667ea61172ea0ebea4a22b6b306 |
| User & Date: | drh 2012-02-24 16:13:55 |
Context
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2012-02-27
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| 14:28 | Fix the xDelete implementation of the multiplexor VFS so that it correctly deletes overflow WAL files. check-in: e44e2677 user: drh tags: trunk | |
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2012-02-24
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| 16:13 | Separate multiplexor overflow pages for -wal and -journal files into separate namespaces when in 8+3 filename mode. check-in: d6850667 user: drh tags: trunk | |
| 15:57 | Fix the multiplexor so that it works with WAL mode and 8+3 filenames. check-in: a9fcb46b user: drh tags: trunk | |
Changes
Changes to src/test_multiplex.c.
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#define sqlite3_mutex_enter(X) #define sqlite3_mutex_try(X) SQLITE_OK #define sqlite3_mutex_leave(X) #define sqlite3_mutex_held(X) ((void)(X),1) #define sqlite3_mutex_notheld(X) ((void)(X),1) #endif /* SQLITE_THREADSAFE==0 */ /* First chunk for rollback journal files */ #define SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET 400 /************************ Shim Definitions ******************************/ #ifndef SQLITE_MULTIPLEX_VFS_NAME # define SQLITE_MULTIPLEX_VFS_NAME "multiplex" #endif ................................................................................ int nBase, /* Size of zBase in bytes (without \0) */ int flags, /* Flags used to open file */ int iChunk, /* Chunk to generate filename for */ char *zOut /* Buffer to write generated name to */ ){ int n = nBase; memcpy(zOut, zBase, n+1); if( iChunk!=0 && iChunk!=SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET ){ #ifdef SQLITE_ENABLE_8_3_NAMES int i; for(i=n-1; i>0 && i>=n-4 && zOut[i]!='.'; i--){} if( i>=n-4 ) n = i+1; if( flags & (SQLITE_OPEN_MAIN_JOURNAL|SQLITE_OPEN_WAL) ){ /* The extensions on overflow files for main databases are 001, 002, ** 003 and so forth. To avoid name collisions, add 400 to the ** extensions of journal files so that they are 401, 402, 403, .... */ iChunk += SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET; } #endif sqlite3_snprintf(4,&zOut[n],"%03d",iChunk); n += 3; } assert( zOut[n]=='\0' ); |
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#define sqlite3_mutex_enter(X) #define sqlite3_mutex_try(X) SQLITE_OK #define sqlite3_mutex_leave(X) #define sqlite3_mutex_held(X) ((void)(X),1) #define sqlite3_mutex_notheld(X) ((void)(X),1) #endif /* SQLITE_THREADSAFE==0 */ /* Maximum chunk number */ #define MX_CHUNK_NUMBER 299 /* First chunk for rollback journal files */ #define SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET 400 #define SQLITE_MULTIPLEX_WAL_8_3_OFFSET 700 /************************ Shim Definitions ******************************/ #ifndef SQLITE_MULTIPLEX_VFS_NAME # define SQLITE_MULTIPLEX_VFS_NAME "multiplex" #endif ................................................................................ int nBase, /* Size of zBase in bytes (without \0) */ int flags, /* Flags used to open file */ int iChunk, /* Chunk to generate filename for */ char *zOut /* Buffer to write generated name to */ ){ int n = nBase; memcpy(zOut, zBase, n+1); if( iChunk!=0 && iChunk<=MX_CHUNK_NUMBER ){ #ifdef SQLITE_ENABLE_8_3_NAMES int i; for(i=n-1; i>0 && i>=n-4 && zOut[i]!='.'; i--){} if( i>=n-4 ) n = i+1; if( flags & SQLITE_OPEN_MAIN_JOURNAL ){ /* The extensions on overflow files for main databases are 001, 002, ** 003 and so forth. To avoid name collisions, add 400 to the ** extensions of journal files so that they are 401, 402, 403, .... */ iChunk += SQLITE_MULTIPLEX_JOURNAL_8_3_OFFSET; }else if( flags & SQLITE_OPEN_WAL ){ /* To avoid name collisions, add 700 to the ** extensions of WAL files so that they are 701, 702, 703, .... */ iChunk += SQLITE_MULTIPLEX_WAL_8_3_OFFSET; } #endif sqlite3_snprintf(4,&zOut[n],"%03d",iChunk); n += 3; } assert( zOut[n]=='\0' ); |