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# 2003 December 18
#
# 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 file implements regression tests for SQLite library. The
# focus of this script is multithreading behavior
#
# $Id: thread1.test,v 1.8 2008/10/07 15:25:49 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Skip this whole file if the thread testing code is not enabled
#
if {[run_thread_tests]==0} { finish_test ; return }
if {[llength [info command thread_step]]==0 || [sqlite3 -has-codec]} {
finish_test
return
}
# Create some data to work with
#
do_test thread1-1.1 {
execsql {
CREATE TABLE t1(a,b);
INSERT INTO t1 VALUES(1,'abcdefgh');
INSERT INTO t1 SELECT a+1, b||b FROM t1;
INSERT INTO t1 SELECT a+2, b||b FROM t1;
INSERT INTO t1 SELECT a+4, b||b FROM t1;
SELECT count(*), max(length(b)) FROM t1;
}
} {8 64}
# Interleave two threads on read access. Then make sure a third
# thread can write the database. In other words:
#
# read-lock A
# read-lock B
# unlock A
# unlock B
# write-lock C
#
# At one point, the write-lock of C would fail on Linux.
#
do_test thread1-1.2 {
thread_create A test.db
thread_create B test.db
thread_create C test.db
thread_compile A {SELECT a FROM t1}
thread_step A
thread_result A
} SQLITE_ROW
do_test thread1-1.3 {
thread_argc A
} 1
do_test thread1-1.4 {
thread_argv A 0
} 1
do_test thread1-1.5 {
thread_compile B {SELECT b FROM t1}
thread_step B
thread_result B
} SQLITE_ROW
do_test thread1-1.6 {
thread_argc B
} 1
do_test thread1-1.7 {
thread_argv B 0
} abcdefgh
do_test thread1-1.8 {
thread_finalize A
thread_result A
} SQLITE_OK
do_test thread1-1.9 {
thread_finalize B
thread_result B
} SQLITE_OK
do_test thread1-1.10 {
thread_compile C {CREATE TABLE t2(x,y)}
thread_step C
thread_result C
} SQLITE_DONE
do_test thread1-1.11 {
thread_finalize C
thread_result C
} SQLITE_OK
do_test thread1-1.12 {
catchsql {SELECT name FROM sqlite_master}
execsql {SELECT name FROM sqlite_master}
} {t1 t2}
#
# The following tests - thread1-2.* - test the following scenario:
#
# 1: Read-lock thread A
# 2: Read-lock thread B
# 3: Attempt to write in thread C -> SQLITE_BUSY
# 4: Check db write failed from main thread.
# 5: Unlock from thread A.
# 6: Attempt to write in thread C -> SQLITE_BUSY
# 7: Check db write failed from main thread.
# 8: Unlock from thread B.
# 9: Attempt to write in thread C -> SQLITE_DONE
# 10: Finalize the write from thread C
# 11: Check db write succeeded from main thread.
#
do_test thread1-2.1 {
thread_halt *
thread_create A test.db
thread_compile A {SELECT a FROM t1}
thread_step A
thread_result A
} SQLITE_ROW
do_test thread1-2.2 {
thread_create B test.db
thread_compile B {SELECT b FROM t1}
thread_step B
thread_result B
} SQLITE_ROW
do_test thread1-2.3 {
thread_create C test.db
thread_compile C {INSERT INTO t2 VALUES(98,99)}
thread_step C
thread_result C
thread_finalize C
thread_result C
} SQLITE_BUSY
do_test thread1-2.4 {
execsql {SELECT * FROM t2}
} {}
do_test thread1-2.5 {
thread_finalize A
thread_result A
} SQLITE_OK
do_test thread1-2.6 {
thread_compile C {INSERT INTO t2 VALUES(98,99)}
thread_step C
thread_result C
thread_finalize C
thread_result C
} SQLITE_BUSY
do_test thread1-2.7 {
execsql {SELECT * FROM t2}
} {}
do_test thread1-2.8 {
thread_finalize B
thread_result B
} SQLITE_OK
do_test thread1-2.9 {
thread_compile C {INSERT INTO t2 VALUES(98,99)}
thread_step C
thread_result C
} SQLITE_DONE
do_test thread1-2.10 {
thread_finalize C
thread_result C
} SQLITE_OK
do_test thread1-2.11 {
execsql {SELECT * FROM t2}
} {98 99}
thread_halt *
finish_test
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