# 2008 May 2 # # The author disclaims copyright to this source code. In place of # 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. # #*********************************************************************** # # Ticket #3093 # # Verify that a busy callback waiting on a reserved lock resolves # once the lock clears. # # $Id: tkt3093.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $ # set testdir [file dirname $argv0] source $testdir/tester.tcl # Set up a test database # do_test tkt3093.1 { db eval { CREATE TABLE t1(x); INSERT INTO t1 VALUES(1); SELECT * FROM t1 } } {1} # Establish a separate, independent connection to that database. # do_test tkt3093.2 { catch {sqlite3_enable_shared_cache 0} sqlite3 db2 test.db db2 eval { SELECT * FROM t1 } } {1} # Make sure that clearing a lock allows a pending request for # a reserved lock to continue. # do_test tkt3093.3 { # This will be the busy callback for connection db2. On the first # busy callback, commit the transaction in db. This should clear # the lock so that there should not be a second callback. If the # busy handler is called a second time, then fail so that we get # timeout. proc busy_callback {cnt} { if {$cnt==0} { db eval COMMIT return 0 } else { return 1 } } db2 busy ::busy_callback # Start a write transaction on db. db eval { BEGIN; INSERT INTO t1 VALUES(2); } # Attempt to modify the database on db2 catchsql { UPDATE t1 SET x=x+1; } db2 } {0 {}} # Verify that everything worked as expected. The db transaction should # have gone first and added entry 2. Then the db2 transaction would have # run and added one to each entry. # do_test tkt3093.4 { db eval {SELECT * FROM t1} } {2 3} do_test tkt3093.5 { db2 eval {SELECT * FROM t1} } {2 3} db2 close finish_test