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#
22if {[run_thread_tests]==0} { finish_test ; return }
23if {[llength [info command thread_step]]==0 || [sqlite3 -has-codec]} {
24  finish_test
25  return
26}
27
28# Create some data to work with
29#
30do_test thread1-1.1 {
31  execsql {
32    CREATE TABLE t1(a,b);
33    INSERT INTO t1 VALUES(1,'abcdefgh');
34    INSERT INTO t1 SELECT a+1, b||b FROM t1;
35    INSERT INTO t1 SELECT a+2, b||b FROM t1;
36    INSERT INTO t1 SELECT a+4, b||b FROM t1;
37    SELECT count(*), max(length(b)) FROM t1;
38  }
39} {8 64}
40
41# Interleave two threads on read access.  Then make sure a third
42# thread can write the database.  In other words:
43#
44#    read-lock A
45#    read-lock B
46#    unlock A
47#    unlock B
48#    write-lock C
49#
50# At one point, the write-lock of C would fail on Linux. 
51#
52do_test thread1-1.2 {
53  thread_create A test.db
54  thread_create B test.db
55  thread_create C test.db
56  thread_compile A {SELECT a FROM t1}
57  thread_step A
58  thread_result A
59} SQLITE_ROW
60do_test thread1-1.3 {
61  thread_argc A
62} 1
63do_test thread1-1.4 {
64  thread_argv A 0
65} 1
66do_test thread1-1.5 {
67  thread_compile B {SELECT b FROM t1}
68  thread_step B
69  thread_result B
70} SQLITE_ROW
71do_test thread1-1.6 {
72  thread_argc B
73} 1
74do_test thread1-1.7 {
75  thread_argv B 0
76} abcdefgh
77do_test thread1-1.8 {
78  thread_finalize A
79  thread_result A
80} SQLITE_OK
81do_test thread1-1.9 {
82  thread_finalize B
83  thread_result B
84} SQLITE_OK
85do_test thread1-1.10 {
86  thread_compile C {CREATE TABLE t2(x,y)}
87  thread_step C
88  thread_result C
89} SQLITE_DONE
90do_test thread1-1.11 {
91  thread_finalize C
92  thread_result C
93} SQLITE_OK
94do_test thread1-1.12 {
95  catchsql {SELECT name FROM sqlite_master}
96  execsql {SELECT name FROM sqlite_master}
97} {t1 t2}
98
99
100#
101# The following tests - thread1-2.* - test the following scenario:
102#
103# 1:  Read-lock thread A
104# 2:  Read-lock thread B
105# 3:  Attempt to write in thread C -> SQLITE_BUSY
106# 4:  Check db write failed from main thread.
107# 5:  Unlock from thread A.
108# 6:  Attempt to write in thread C -> SQLITE_BUSY
109# 7:  Check db write failed from main thread.
110# 8:  Unlock from thread B.
111# 9:  Attempt to write in thread C -> SQLITE_DONE
112# 10: Finalize the write from thread C
113# 11: Check db write succeeded from main thread.
114#
115do_test thread1-2.1 {
116  thread_halt *
117  thread_create A test.db
118  thread_compile A {SELECT a FROM t1}
119  thread_step A
120  thread_result A
121} SQLITE_ROW
122do_test thread1-2.2 {
123  thread_create B test.db
124  thread_compile B {SELECT b FROM t1}
125  thread_step B
126  thread_result B
127} SQLITE_ROW
128do_test thread1-2.3 {
129  thread_create C test.db
130  thread_compile C {INSERT INTO t2 VALUES(98,99)}
131  thread_step C
132  thread_result C
133  thread_finalize C
134  thread_result C
135} SQLITE_BUSY
136
137do_test thread1-2.4 {
138  execsql {SELECT * FROM t2}
139} {}
140
141do_test thread1-2.5 {
142  thread_finalize A
143  thread_result A
144} SQLITE_OK
145do_test thread1-2.6 {
146  thread_compile C {INSERT INTO t2 VALUES(98,99)}
147  thread_step C
148  thread_result C
149  thread_finalize C
150  thread_result C
151} SQLITE_BUSY
152do_test thread1-2.7 {
153  execsql {SELECT * FROM t2}
154} {}
155do_test thread1-2.8 {
156  thread_finalize B
157  thread_result B
158} SQLITE_OK
159do_test thread1-2.9 {
160  thread_compile C {INSERT INTO t2 VALUES(98,99)}
161  thread_step C
162  thread_result C
163} SQLITE_DONE
164do_test thread1-2.10 {
165  thread_finalize C
166  thread_result C
167} SQLITE_OK
168do_test thread1-2.11 {
169  execsql {SELECT * FROM t2}
170} {98 99}
171
172thread_halt *   
173finish_test
174