From a53c704fec33e929883e7e17ebd5802e2094508e Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Sat, 25 Jul 2009 22:13:34 +0000
Subject: [PATCH] The noReadlock property on a pager object implies the
 readOnly property. Use this fact to simplify the logic in
 sqlite3PagerSharedLock(). (CVS 6944)

FossilOrigin-Name: 886e665f6cf780464b280c286b03c9fb5c1a6b2a
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 src/pager.c   |  9 +++++----
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/manifest b/manifest
index 141cfeab9b..58f4e4f3bb 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\sobsolete\sassert\sand\stestcase\smacros\srelated\sto\sticket\s#2565\s(CVS\s6943)
-D 2009-07-25T19:31:32
+C The\snoReadlock\sproperty\son\sa\spager\sobject\simplies\sthe\sreadOnly\sproperty.\nUse\sthis\sfact\sto\ssimplify\sthe\slogic\sin\ssqlite3PagerSharedLock().\s(CVS\s6944)
+D 2009-07-25T22:13:35
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in df9359da7a726ccb67a45db905c5447d5c00c6ef
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -147,7 +147,7 @@ F src/os_common.h 8c61457df58f1a4bd5f5adc3e90e01b37bf7afbc
 F src/os_os2.c bed77dc26e3a95ce4a204936b9a1ca6fe612fcc5
 F src/os_unix.c cdb2a08b9ce4aa13b3f7b91d4dd60fb48be9f56a
 F src/os_win.c 725c38a524d168ce280446ad8761d731bc516405
-F src/pager.c a9ce18aaeff8d0db8e3a1ce201403d24a88b5615
+F src/pager.c 36a14ae25416f07a81b0ca391d1b877b6da2e8cf
 F src/pager.h 11852d044c86cf5a9d6e34171fb0c4fcf1f6265f
 F src/parse.y bcd46d43fbd23a22b8c020a3eb1806b794794ed5
 F src/pcache.c c92ffd4f3e1279b3766854c6d18b5bf4aac0d1fa
@@ -738,7 +738,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl 672f81d693a03f80f5ae60bfefacd8a349e76746
-P 04211e6af9cdd3e7f19b458c72b722f8f8584245
-R 8adb748dfc821dbb88e17d8c87bfe5b8
+P f0024b3189245d608a0cb57fa7e472c6daa1406f
+R 25fcba4dba5a24b6461a64df15761046
 U drh
-Z f21756b73703ef7299f117f5f2222357
+Z 68027e399a7581e7ca33dd0037ba76d1
diff --git a/manifest.uuid b/manifest.uuid
index 3efb4d7a77..e31915e68b 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-f0024b3189245d608a0cb57fa7e472c6daa1406f
\ No newline at end of file
+886e665f6cf780464b280c286b03c9fb5c1a6b2a
\ No newline at end of file
diff --git a/src/pager.c b/src/pager.c
index a537536b4f..d76da380e0 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.626 2009/07/25 19:31:32 drh Exp $
+** @(#) $Id: pager.c,v 1.627 2009/07/25 22:13:35 drh Exp $
 */
 #ifndef SQLITE_OMIT_DISKIO
 #include "sqliteInt.h"
@@ -3567,14 +3567,15 @@ int sqlite3PagerSharedLock(Pager *pPager){
     int isHotJournal = 0;
     assert( !MEMDB );
     assert( sqlite3PcacheRefCount(pPager->pPCache)==0 );
-    if( !pPager->noReadlock ){
+    if( pPager->noReadlock ){
+      assert( pPager->readOnly );
+      pPager->state = PAGER_SHARED;
+    }else{
       rc = pager_wait_on_lock(pPager, SHARED_LOCK);
       if( rc!=SQLITE_OK ){
         assert( pPager->state==PAGER_UNLOCK );
         return pager_error(pPager, rc);
       }
-    }else if( pPager->state==PAGER_UNLOCK ){
-      pPager->state = PAGER_SHARED;
     }
     assert( pPager->state>=SHARED_LOCK );