115 lines
2.9 KiB
Plaintext
115 lines
2.9 KiB
Plaintext
# 2015 Mar 17
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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source $testdir/lock_common.tcl
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source $testdir/wal_common.tcl
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finish_test; return; # Feature currently not implemented.
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ifcapable !wal {finish_test ; return }
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if {$::tcl_platform(platform)!="unix"} { finish_test ; return }
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set testprefix walblock
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catch { db close }
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testvfs tvfs -fullshm 1
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foreach f [glob test.db*] { forcedelete $f }
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sqlite3 db test.db -vfs tvfs
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do_execsql_test 1.1.0 {
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CREATE TABLE t1(x, y);
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INSERT INTO t1 VALUES(1, 2);
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INSERT INTO t1 VALUES(3, 4);
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INSERT INTO t1 VALUES(5, 6);
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PRAGMA journal_mode = wal;
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INSERT INTO t1 VALUES(7, 8);
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} {wal}
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do_test 1.1.1 {
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lsort [glob test.db*]
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} {test.db test.db-shm test.db-wal}
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do_test 1.1.2 {
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set C [launch_testfixture]
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testfixture $C {
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sqlite3 db test.db
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db eval { SELECT * FROM t1 }
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}
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} {1 2 3 4 5 6 7 8}
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do_test 1.1.3 {
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set ::out [list]
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testfixture $C {
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db eval { SELECT * FROM t1 }
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} [list set ::out]
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set ::out
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} {}
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do_test 1.1.4 {
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vwait ::out
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set ::out
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} {1 2 3 4 5 6 7 8}
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#
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# Test that if a read client cannot read the wal-index header because a
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# write client is in the middle of updating it, the reader blocks until
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# the writer finishes.
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#
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# 1. Open a write transaction using client [db] in this process.
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#
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# 2. Attempt to commit the write transaction. Intercept the xShmBarrier()
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# call made by the writer between updating the two copies of the
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# wal-index header.
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#
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# 3. Within the xShmBarrier() callback, make an asynchronous request to
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# the other process to read from the database. It should block, as it
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# cannot get read the wal-index header.
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#
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# 4. Still in xShmBarrier(), wait for 5 seconds. Check that the other
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# process has not answered the request.
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#
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# 5: Finish committing the transaction. Then wait for 0.5 seconds more.
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# Ensure that the second process has by this stage read the database
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# and that the snapshot it read included the transaction committed in
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# step (4).
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#
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do_execsql_test 1.2.1 {
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BEGIN;
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INSERT INTO t1 VALUES(9, 10);
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} {}
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tvfs script barrier_callback
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tvfs filter xShmBarrier
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proc barrier_callback {method args} {
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set ::out ""
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testfixture $::C { db eval { SELECT * FROM t1 } } {set ::out}
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do_test "1.2.2.(blocking 10 seconds)" {
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set ::continue 0
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after 10000 {set ::continue 1}
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vwait ::continue
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set ::out
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} {}
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}
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execsql COMMIT
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do_test "1.2.3.(blocking 0.5 seconds)" {
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set ::continue 0
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after 500 {set ::continue 1}
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vwait ::continue
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set ::out
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} {1 2 3 4 5 6 7 8 9 10}
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finish_test
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