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+# 2007 September 10
+#
+# 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.
+#
+#***********************************************************************
+#
+# This test attempts to deadlock SQLite in shared-cache mode.
+#
+#
+# $Id: thread002.test,v 1.9 2009/03/26 14:48:07 danielk1977 Exp $
+
+set testdir [file dirname $argv0]
+
+set do_not_use_codec 1
+source $testdir/tester.tcl
+if {[run_thread_tests]==0} { finish_test ; return }
+ifcapable !shared_cache { finish_test ; return }
+
+db close
+set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
+
+set ::NTHREAD 10
+
+do_test thread002.1 {
+ # Create 3 databases with identical schemas:
+ for {set ii 0} {$ii < 3} {incr ii} {
+ forcedelete test${ii}.db
+ sqlite3 db test${ii}.db
+ execsql {
+ CREATE TABLE t1(k, v);
+ CREATE INDEX t1_i ON t1(v);
+ INSERT INTO t1(v) VALUES(1.0);
+ }
+ db close
+ }
+} {}
+
+set thread_program {
+ set ::DB [sqlite3_open test.db]
+ for {set ii 1} {$ii <= 3} {incr ii} {
+ set T [lindex $order [expr $ii-1]]
+ execsql "ATTACH 'test${T}.db' AS aux${ii}"
+ }
+
+ for {set ii 0} {$ii < 100} {incr ii} {
+ execsql { SELECT * FROM aux1.t1 }
+ execsql { INSERT INTO aux1.t1(v) SELECT sum(v) FROM aux2.t1 }
+
+ execsql { SELECT * FROM aux2.t1 }
+ execsql { INSERT INTO aux2.t1(v) SELECT sum(v) FROM aux3.t1 }
+
+ execsql { SELECT * FROM aux3.t1 }
+ execsql { INSERT INTO aux3.t1(v) SELECT sum(v) FROM aux1.t1 }
+
+ execsql { CREATE TABLE IF NOT EXISTS aux1.t2(a,b) }
+ execsql { DROP TABLE IF EXISTS aux1.t2 }
+
+ # if {($ii%10)==0} {puts -nonewline . ; flush stdout}
+ puts -nonewline . ; flush stdout
+ }
+
+ sqlite3_close $::DB
+ list OK
+}
+
+set order_list [list {0 1 2} {0 2 1} {1 0 2} {1 2 0} {2 0 1} {2 1 0}]
+
+array unset finished
+for {set ii 0} {$ii < $::NTHREAD} {incr ii} {
+ set order [lindex $order_list [expr $ii%6]]
+ thread_spawn finished($ii) $thread_procs "set order {$order}" $thread_program
+}
+
+# Wait for all threads to finish, then check they all returned "OK".
+#
+for {set i 0} {$i < $::NTHREAD} {incr i} {
+ if {![info exists finished($i)]} {
+ vwait finished($i)
+ }
+ do_test thread002.2.$i {
+ set ::finished($i)
+ } OK
+}
+
+# Check all three databases are Ok.
+for {set ii 0} {$ii < 3} {incr ii} {
+ do_test thread002.3.$ii {
+ sqlite3 db test${ii}.db
+ set res [list \
+ [execsql {SELECT count(*) FROM t1}] \
+ [execsql {PRAGMA integrity_check}] \
+ ]
+ db close
+ set res
+ } [list [expr 1 + $::NTHREAD*100] ok]
+}
+
+sqlite3_enable_shared_cache $::enable_shared_cache
+set sqlite_open_file_count 0
+finish_test