xref: /sqlite-3.40.0/test/thread1.test (revision 5d00d0a8) 
1# 2003 December 18
2#
3# The author disclaims copyright to this source code.  In place of
4# a legal notice, here is a blessing:
5#
6#    May you do good and not evil.
7#    May you find forgiveness for yourself and forgive others.
8#    May you share freely, never taking more than you give.
9#
10#***********************************************************************
11# This file implements regression tests for SQLite library.  The
12# focus of this script is multithreading behavior
13#
14# $Id: thread1.test,v 1.8 2008/10/07 15:25:49 drh Exp $
15
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20# Skip this whole file if the thread testing code is not enabled
21#
22ifcapable !mutex {
23  finish_test
24  return
25}
26if {[llength [info command thread_step]]==0 || [sqlite3 -has-codec]} {
27  finish_test
28  return
29}
30
31# Create some data to work with
32#
33do_test thread1-1.1 {
34  execsql {
35    CREATE TABLE t1(a,b);
36    INSERT INTO t1 VALUES(1,'abcdefgh');
37    INSERT INTO t1 SELECT a+1, b||b FROM t1;
38    INSERT INTO t1 SELECT a+2, b||b FROM t1;
39    INSERT INTO t1 SELECT a+4, b||b FROM t1;
40    SELECT count(*), max(length(b)) FROM t1;
41  }
42} {8 64}
43
44# Interleave two threads on read access.  Then make sure a third
45# thread can write the database.  In other words:
46#
47#    read-lock A
48#    read-lock B
49#    unlock A
50#    unlock B
51#    write-lock C
52#
53# At one point, the write-lock of C would fail on Linux.
54#
55do_test thread1-1.2 {
56  thread_create A test.db
57  thread_create B test.db
58  thread_create C test.db
59  thread_compile A {SELECT a FROM t1}
60  thread_step A
61  thread_result A
62} SQLITE_ROW
63do_test thread1-1.3 {
64  thread_argc A
65} 1
66do_test thread1-1.4 {
67  thread_argv A 0
68} 1
69do_test thread1-1.5 {
70  thread_compile B {SELECT b FROM t1}
71  thread_step B
72  thread_result B
73} SQLITE_ROW
74do_test thread1-1.6 {
75  thread_argc B
76} 1
77do_test thread1-1.7 {
78  thread_argv B 0
79} abcdefgh
80do_test thread1-1.8 {
81  thread_finalize A
82  thread_result A
83} SQLITE_OK
84do_test thread1-1.9 {
85  thread_finalize B
86  thread_result B
87} SQLITE_OK
88do_test thread1-1.10 {
89  thread_compile C {CREATE TABLE t2(x,y)}
90  thread_step C
91  thread_result C
92} SQLITE_DONE
93do_test thread1-1.11 {
94  thread_finalize C
95  thread_result C
96} SQLITE_OK
97do_test thread1-1.12 {
98  catchsql {SELECT name FROM sqlite_master}
99  execsql {SELECT name FROM sqlite_master}
100} {t1 t2}
101
102
103#
104# The following tests - thread1-2.* - test the following scenario:
105#
106# 1:  Read-lock thread A
107# 2:  Read-lock thread B
108# 3:  Attempt to write in thread C -> SQLITE_BUSY
109# 4:  Check db write failed from main thread.
110# 5:  Unlock from thread A.
111# 6:  Attempt to write in thread C -> SQLITE_BUSY
112# 7:  Check db write failed from main thread.
113# 8:  Unlock from thread B.
114# 9:  Attempt to write in thread C -> SQLITE_DONE
115# 10: Finalize the write from thread C
116# 11: Check db write succeeded from main thread.
117#
118do_test thread1-2.1 {
119  thread_halt *
120  thread_create A test.db
121  thread_compile A {SELECT a FROM t1}
122  thread_step A
123  thread_result A
124} SQLITE_ROW
125do_test thread1-2.2 {
126  thread_create B test.db
127  thread_compile B {SELECT b FROM t1}
128  thread_step B
129  thread_result B
130} SQLITE_ROW
131do_test thread1-2.3 {
132  thread_create C test.db
133  thread_compile C {INSERT INTO t2 VALUES(98,99)}
134  thread_step C
135  thread_result C
136  thread_finalize C
137  thread_result C
138} SQLITE_BUSY
139
140do_test thread1-2.4 {
141  execsql {SELECT * FROM t2}
142} {}
143
144do_test thread1-2.5 {
145  thread_finalize A
146  thread_result A
147} SQLITE_OK
148do_test thread1-2.6 {
149  thread_compile C {INSERT INTO t2 VALUES(98,99)}
150  thread_step C
151  thread_result C
152  thread_finalize C
153  thread_result C
154} SQLITE_BUSY
155do_test thread1-2.7 {
156  execsql {SELECT * FROM t2}
157} {}
158do_test thread1-2.8 {
159  thread_finalize B
160  thread_result B
161} SQLITE_OK
162do_test thread1-2.9 {
163  thread_compile C {INSERT INTO t2 VALUES(98,99)}
164  thread_step C
165  thread_result C
166} SQLITE_DONE
167do_test thread1-2.10 {
168  thread_finalize C
169  thread_result C
170} SQLITE_OK
171do_test thread1-2.11 {
172  execsql {SELECT * FROM t2}
173} {98 99}
174
175thread_halt *
176finish_test
177