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Updates to comments and testcase() macros in wal.c.

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FossilOrigin-Name: 4d90cc0bc07e791b2838fc384866bd5c2282f681
This commit is contained in:
drh
2010-06-15 11:21:54 +00:00
parent f886b4f851
commit ffca43014b
3 changed files with 16 additions and 15 deletions
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11
src/wal.c
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@@ -72,6 +72,7 @@
** big-endian format regardless of which byte order is used to compute
** the checksum. The checksum is computed by interpreting the input as
** an even number of unsigned 32-bit integers: x[0] through x[N]. The
** algorithm used for the checksum is as follows:
**
** for i from 0 to n-1 step 2:
** s0 += x[i] + s1;
@@ -80,7 +81,7 @@
**
** On a checkpoint, the WAL is first VFS.xSync-ed, then valid content of the
** WAL is transferred into the database, then the database is VFS.xSync-ed.
** The VFS.xSync operations server as write barriers - all writes launched
** The VFS.xSync operations serve as write barriers - all writes launched
** before the xSync must complete before any write that launches after the
** xSync begins.
**
@@ -152,7 +153,7 @@
**
** Each index block contains two sections, a page-mapping that contains the
** database page number associated with each wal frame, and a hash-table
** that allows users to query an index block for a specific page number.
** that allows readers to query an index block for a specific page number.
** The page-mapping is an array of HASHTABLE_NPAGE (or HASHTABLE_NPAGE_ONE
** for the first index block) 32-bit page numbers. The first entry in the
** first index-block contains the database page number corresponding to the
@@ -846,9 +847,9 @@ static void walCleanupHash(Wal *pWal){
int i; /* Used to iterate through aHash[] */
assert( pWal->writeLock );
testcase( pWal->hdr.mxFrame==HASHTABLE_NPAGE-1 );
testcase( pWal->hdr.mxFrame==HASHTABLE_NPAGE );
testcase( pWal->hdr.mxFrame==HASHTABLE_NPAGE+1 );
testcase( pWal->hdr.mxFrame==HASHTABLE_NPAGE_ONE-1 );
testcase( pWal->hdr.mxFrame==HASHTABLE_NPAGE_ONE );
testcase( pWal->hdr.mxFrame==HASHTABLE_NPAGE_ONE+1 );
if( pWal->hdr.mxFrame==0 ) return;