Adding the sqlite sourcecode

test/walsetlk3.test

@@ -0,0 +1,135 @@
+# 2020 May 06
+#
+# 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.
+#
+#***********************************************************************
+#
+# TESTRUNNER: slow
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+source $testdir/lock_common.tcl
+set testprefix walsetlk3
+
+ifcapable !wal {finish_test ; return }
+ifcapable !setlk_timeout {finish_test ; return }
+
+do_execsql_test 1.0 {
+  CREATE TABLE t1(x, y);
+  PRAGMA journal_mode = wal;
+  INSERT INTO t1 VALUES(1, 2);
+  INSERT INTO t1 VALUES(3, 4);
+} {wal}
+
+db close
+
+proc sql_block_on_close {sql} {
+  testfixture_nb done [string map [list %SQL% $sql] {
+    testvfs tvfs
+    tvfs script xWrite
+    tvfs filter xWrite
+  
+    set ::delay_done 0
+    proc xWrite {method fname args} {
+      if {[file tail $fname]=="test.db" && $::delay_done==0} {
+        after 3000
+        set ::delay_done 1
+      }
+      return 0
+    }
+  
+    sqlite3 db test.db -vfs tvfs
+    db eval {%SQL%}
+    db close
+  }]
+}
+
+# Start a second process that writes to the db, then blocks within the
+# [db close] holding an EXCLUSIVE on the db in order to checkpoint and 
+# delete the wal file. Then try to read the db.
+#
+# Without the SQLITE_SETLK_BLOCK_ON_CONNECT flag, this should fail with
+# SQLITE_BUSY.
+#
+sql_block_on_close {
+  INSERT INTO t1 VALUES(5, 6);
+  INSERT INTO t1 VALUES(7, 8);
+}
+after 500 {set ok 1}
+vwait ok
+sqlite3 db test.db
+sqlite3_setlk_timeout db 2000
+do_catchsql_test 1.1 {
+  SELECT * FROM t1
+} {1 {database is locked}}
+
+vwait ::done
+
+# But with SQLITE_SETLK_BLOCK_ON_CONNECT flag, it should succeed.
+#
+sql_block_on_close {
+  INSERT INTO t1 VALUES(9, 10);
+  INSERT INTO t1 VALUES(11, 12);
+}
+after 500 {set ok 1}
+vwait ok
+sqlite3 db test.db
+sqlite3_setlk_timeout -block db 2000
+do_catchsql_test 1.2 {
+  SELECT * FROM t1
+} {0 {1 2 3 4 5 6 7 8 9 10 11 12}}
+
+vwait ::done
+
+#-------------------------------------------------------------------------
+# Check that the SQLITE_SETLK_BLOCK_ON_CONNECT does not cause connections
+# to block when taking a SHARED lock on a rollback mode database.
+#
+reset_db
+do_execsql_test 2.1 {
+  CREATE TABLE x1(a);
+  INSERT INTO x1 VALUES(1), (2), (3);
+}
+
+proc sql_block_on_write {sql} {
+  testfixture_nb done [string map [list %SQL% $sql] {
+    sqlite3 db test.db 
+    db eval "BEGIN EXCLUSIVE"
+    db eval {%SQL%}
+    after 3000
+    db eval COMMIT
+    db close
+  }]
+}
+
+db close
+sql_block_on_write {
+  INSERT INTO x1 VALUES(4);
+}
+
+after 500 {set ok 1}
+vwait ok
+
+sqlite3 db test.db
+sqlite3_setlk_timeout -block db 2000
+
+do_catchsql_test 2.2 {
+  SELECT * FROM x1
+} {1 {database is locked}}
+
+vwait ::done
+after 500 {set ok 1}
+vwait ok
+
+do_catchsql_test 2.3 {
+  SELECT * FROM x1
+} {0 {1 2 3 4}}
+
+finish_test
+