-C Adjustments\sto\sdocumentation\shyperlinks\sto\saccommodate\sthe\snew\sVFS\ndocumentation.
-D 2011-05-20T20:42:11.435
+C Minor\scleanups\sto\sthe\sheader\scomments\son\svarious\stest_*.c\sfile,\sto\smake\nthe\ssuitable\sfor\sprogrammer-level\sdocumentation.
+D 2011-05-23T18:37:42.742
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 11dcc00a8d0e5202def00e81732784fb0cc4fe1d
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
F src/test_backup.c c129c91127e9b46e335715ae2e75756e25ba27de
F src/test_btree.c 47cd771250f09cdc6e12dda5bc71bc0b3abc96e2
F src/test_config.c 9a6aa8301a56906612b5e70f5b38e80cfb8af8e7
-F src/test_demovfs.c 938d0f595f8bd310076e1c06cf7885a01ce7ce01
+F src/test_demovfs.c 20a4975127993f4959890016ae9ce5535a880094
F src/test_devsym.c e7498904e72ba7491d142d5c83b476c4e76993bc
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F src/test_intarray.h 489edb9068bb926583445cb02589344961054207
-F src/test_journal.c 785edd54f963aefb3c1628124170a56697c68c70
+F src/test_journal.c 03313c693cca72959dcaaf79f8d76f21c01e19ff
F src/test_loadext.c df586c27176e3c2cb2e099c78da67bf14379a56e
F src/test_malloc.c 7ca7be34e0e09ef0ed6619544552ed95732e41f6
-F src/test_multiplex.c 8e67617b80b532315293761970589581745a52a0
+F src/test_multiplex.c a7457a1ac46964b7f897d75ecfd447410ec067e6
F src/test_multiplex.h e99c571bc4968b7a9363b661481f3934bfead61d
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-F src/test_vfs.c 0ac5b2e3da61bc385c1017890687c359746be2fd
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\ No newline at end of file
+a65d043a2ad895b931871c67e0ef397a1dc614a6
\ No newline at end of file
**
*************************************************************************
**
-** An example of a simple VFS implementation that omits complex features
-** often not required or not possible on embedded platforms. Also includes
-** code to buffer writes to the journal file, which can be a significant
-** performance improvement on some embedded platforms.
+** This file implements an example of a simple VFS implementation that
+** omits complex features often not required or not possible on embedded
+** platforms. Code is included to buffer writes to the journal file,
+** which can be a significant performance improvement on some embedded
+** platforms.
**
-*/
-
-/*
** OVERVIEW
**
** The code in this file implements a minimal SQLite VFS that can be
** an existing VFS. The code in this file attempts to verify that SQLite
** correctly populates and syncs a journal file before writing to a
** corresponding database file.
-*/
-#if SQLITE_TEST /* This file is used for testing only */
-
-#include "sqlite3.h"
-#include "sqliteInt.h"
-
-/*
+**
** INTERFACE
**
** The public interface to this wrapper VFS is two functions:
**
** c) The journal file is deleted using xDelete.
*/
+#if SQLITE_TEST /* This file is used for testing only */
+
+#include "sqlite3.h"
+#include "sqliteInt.h"
/*
** Maximum pathname length supported by the jt backend.
*************************************************************************
**
** This file contains a VFS "shim" - a layer that sits in between the
-** pager and the real VFS.
+** pager and the real VFS - that breaks up a very large database file
+** into two or more smaller files on disk. This is useful, for example,
+** in order to support large, multi-gigabyte databases on older filesystems
+** that limit the maximum file size to 2 GiB.
**
-** This particular shim enforces a multiplex system on DB files.
-** This shim shards/partitions a single DB file into smaller
-** "chunks" such that the total DB file size may exceed the maximum
-** file size of the underlying file system.
+** USAGE:
**
+** Compile this source file and link it with your application. Then
+** at start-time, invoke the following procedure:
+**
+** int sqlite3_multiplex_initialize(
+** const char *zOrigVfsName, // The underlying real VFS
+** int makeDefault // True to make multiplex the default VFS
+** );
+**
+** The procedure call above will create and register a new VFS shim named
+** "multiplex". The multiplex VFS will use the VFS named by zOrigVfsName to
+** do the actual disk I/O. (The zOrigVfsName parameter may be NULL, in
+** which case the default VFS at the moment sqlite3_multiplex_initialize()
+** is called will be used as the underlying real VFS.)
+**
+** If the makeDefault parameter is TRUE then multiplex becomes the new
+** default VFS. Otherwise, you can use the multiplex VFS by specifying
+** "multiplex" as the 4th parameter to sqlite3_open_v2() or by employing
+** URI filenames and adding "vfs=multiplex" as a parameter to the filename
+** URI.
+**
+** The multiplex VFS allows databases up to 32 GiB in size. But it splits
+** the files up into 1 GiB pieces, so that they will work even on filesystems
+** that do not support large files.
*/
#include "sqlite3.h"
#include <string.h>
**
******************************************************************************
**
-*/
-#if SQLITE_TEST /* This file is used for testing only */
-
-/*
** This file contains the implementation of the Tcl [testvfs] command,
** used to create SQLite VFS implementations with various properties and
** instrumentation to support testing SQLite.
** -mxpathname INTEGER (Value for sqlite3_vfs.mxPathname)
** -iversion INTEGER (Value for sqlite3_vfs.iVersion)
*/
+#if SQLITE_TEST /* This file is used for testing only */
#include "sqlite3.h"
#include "sqliteInt.h"