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Overview
| Comment: | Remove a redundant branch from btree.c. (CVS 6847) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
133357d2f070ba303deddff59beead1e |
| User & Date: | danielk1977 2009-07-04 15:41:03 |
Context
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2009-07-04
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| 17:16 | Remove unreachable code from function btreeCursor() in btree.c. (CVS 6848) check-in: c76a366e user: danielk1977 tags: trunk | |
| 15:41 | Remove a redundant branch from btree.c. (CVS 6847) check-in: 133357d2 user: danielk1977 tags: trunk | |
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2009-07-03
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| 22:54 | Remove two unused fields from the Parse structure. The TCL interface now removes leading whitespace from SQL statements before parsing them. (CVS 6846) check-in: 983cb692 user: drh tags: trunk | |
Changes
Changes to src/btree.c.
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** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** $Id: btree.c,v 1.650 2009/07/03 16:25:07 danielk1977 Exp $ ** ** This file implements a external (disk-based) database using BTrees. ** See the header comment on "btreeInt.h" for additional information. ** Including a description of file format and an overview of operation. */ #include "btreeInt.h" ................................................................................ /* ** If there are no outstanding cursors and we are not in the middle ** of a transaction but there is a read lock on the database, then ** this routine unrefs the first page of the database file which ** has the effect of releasing the read lock. ** ** If there are any outstanding cursors, this routine is a no-op. ** ** If there is a transaction in progress, this routine is a no-op. */ static void unlockBtreeIfUnused(BtShared *pBt){ assert( sqlite3_mutex_held(pBt->mutex) ); if( pBt->inTransaction==TRANS_NONE && pBt->pCursor==0 && pBt->pPage1!=0 ){ assert( pBt->pPage1->aData ); assert( sqlite3PagerRefcount(pBt->pPager)==1 ); assert( pBt->pPage1->aData ); releasePage(pBt->pPage1); pBt->pPage1 = 0; } } |
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** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** $Id: btree.c,v 1.651 2009/07/04 15:41:03 danielk1977 Exp $ ** ** This file implements a external (disk-based) database using BTrees. ** See the header comment on "btreeInt.h" for additional information. ** Including a description of file format and an overview of operation. */ #include "btreeInt.h" ................................................................................ /* ** If there are no outstanding cursors and we are not in the middle ** of a transaction but there is a read lock on the database, then ** this routine unrefs the first page of the database file which ** has the effect of releasing the read lock. ** ** If there is a transaction in progress, this routine is a no-op. */ static void unlockBtreeIfUnused(BtShared *pBt){ assert( sqlite3_mutex_held(pBt->mutex) ); assert( pBt->pCursor==0 || pBt->inTransaction>TRANS_NONE ); if( pBt->inTransaction==TRANS_NONE && pBt->pPage1!=0 ){ assert( pBt->pPage1->aData ); assert( sqlite3PagerRefcount(pBt->pPager)==1 ); assert( pBt->pPage1->aData ); releasePage(pBt->pPage1); pBt->pPage1 = 0; } } |