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| 1 # 2009 July 2 | |
| 2 # | |
| 3 # The author disclaims copyright to this source code. In place of | |
| 4 # a legal notice, here is a blessing: | |
| 5 # | |
| 6 # May you do good and not evil. | |
| 7 # May you find forgiveness for yourself and forgive others. | |
| 8 # May you share freely, never taking more than you give. | |
| 9 # | |
| 10 #*********************************************************************** | |
| 11 # | |
| 12 # $Id: sharedlock.test,v 1.1 2009/07/02 17:21:58 danielk1977 Exp $ | |
| 13 | |
| 14 set testdir [file dirname $argv0] | |
| 15 source $testdir/tester.tcl | |
| 16 db close | |
| 17 | |
| 18 ifcapable !shared_cache { | |
| 19 finish_test | |
| 20 return | |
| 21 } | |
| 22 | |
| 23 set ::enable_shared_cache [sqlite3_enable_shared_cache 1] | |
| 24 sqlite3 db test.db | |
| 25 sqlite3 db2 test.db | |
| 26 | |
| 27 do_test sharedlock-1.1 { | |
| 28 execsql { | |
| 29 CREATE TABLE t1(a, b); | |
| 30 INSERT INTO t1 VALUES(1, 'one'); | |
| 31 INSERT INTO t1 VALUES(2, 'two'); | |
| 32 } | |
| 33 } {} | |
| 34 | |
| 35 do_test sharedlock-1.2 { | |
| 36 set res [list] | |
| 37 db eval { SELECT * FROM t1 ORDER BY rowid } { | |
| 38 lappend res $a $b | |
| 39 if {$a == 1} { catch { db eval "INSERT INTO t1 VALUES(3, 'three')" } } | |
| 40 | |
| 41 # This should fail. Connection [db] has a read-lock on t1, which should | |
| 42 # prevent connection [db2] from obtaining the write-lock it needs to | |
| 43 # modify t1. At one point there was a bug causing the previous INSERT | |
| 44 # to drop the read-lock belonging to [db]. | |
| 45 if {$a == 2} { catch { db2 eval "INSERT INTO t1 VALUES(4, 'four')" } } | |
| 46 } | |
| 47 set res | |
| 48 } {1 one 2 two 3 three} | |
| 49 | |
| 50 db close | |
| 51 db2 close | |
| 52 | |
| 53 sqlite3_enable_shared_cache $::enable_shared_cache | |
| 54 finish_test | |
| 55 | |
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