# 2006 January 14## 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: thread2.test,v 1.2 2006/01/18 18:33:42 danielk1977 Exp $set testdir [file dirname $argv0]source $testdir/tester.tcl# This file swaps database connections between threads. This# is illegal if memory-management is enabled, so skip this file# in that case.ifcapable memorymanage {  finish_test  return}# Skip this whole file if the thread testing code is not enabled#if {[llength [info command thread_step]]==0 || [sqlite3 -has-codec]} {  finish_test  return}if {![info exists threadsOverrideEachOthersLocks]} {  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}# Use the thread_swap command to move the database connections between# threads, then verify that they still work.#do_test thread2-1.2 {  db close  thread_create A test.db  thread_create B test.db  thread_swap A B  thread_compile A {SELECT a FROM t1 LIMIT 1}  thread_result A} {SQLITE_OK}do_test thread2-1.3 {  thread_step A  thread_result A} {SQLITE_ROW}do_test thread2-1.4 {  thread_argv A 0} {1}do_test thread2-1.5 {  thread_finalize A  thread_result A} {SQLITE_OK}do_test thread2-1.6 {  thread_compile B {SELECT a FROM t1 LIMIT 1}  thread_result B} {SQLITE_OK}do_test thread2-1.7 {  thread_step B  thread_result B} {SQLITE_ROW}do_test thread2-1.8 {  thread_argv B 0} {1}do_test thread2-1.9 {  thread_finalize B  thread_result B} {SQLITE_OK}# Swap them again.#do_test thread2-2.2 {  thread_swap A B  thread_compile A {SELECT a FROM t1 LIMIT 1}  thread_result A} {SQLITE_OK}do_test thread2-2.3 {  thread_step A  thread_result A} {SQLITE_ROW}do_test thread2-2.4 {  thread_argv A 0} {1}do_test thread2-2.5 {  thread_finalize A  thread_result A} {SQLITE_OK}do_test thread2-2.6 {  thread_compile B {SELECT a FROM t1 LIMIT 1}  thread_result B} {SQLITE_OK}do_test thread2-2.7 {  thread_step B  thread_result B} {SQLITE_ROW}do_test thread2-2.8 {  thread_argv B 0} {1}do_test thread2-2.9 {  thread_finalize B  thread_result B} {SQLITE_OK}thread_halt Athread_halt B# Save the original (correct) value of threadsOverrideEachOthersLocks# so that it can be restored.  If this value is left set incorrectly, lots# of things will go wrong in future tests.#set orig_threadOverride $threadsOverrideEachOthersLocks# Pretend we are on a system (like RedHat9) were threads do not# override each others locks.#set threadsOverrideEachOthersLocks 0# Verify that we can move database connections between threads as# long as no locks are held.#do_test thread2-3.1 {  thread_create A test.db  set DB [thread_db_get A]  thread_halt A} {}do_test thread2-3.2 {  set STMT [sqlite3_prepare $DB {SELECT a FROM t1 LIMIT 1} -1 TAIL]  sqlite3_step $STMT} SQLITE_ROWdo_test thread2-3.3 {  sqlite3_column_int $STMT 0} 1do_test thread2-3.4 {  sqlite3_finalize $STMT} SQLITE_OKdo_test thread2-3.5 {  set STMT [sqlite3_prepare $DB {SELECT max(a) FROM t1} -1 TAIL]  sqlite3_step $STMT} SQLITE_ROWdo_test thread2-3.6 {  sqlite3_column_int $STMT 0} 8do_test thread2-3.7 {  sqlite3_finalize $STMT} SQLITE_OKdo_test thread2-3.8 {  sqlite3_close $DB} {SQLITE_OK}do_test thread2-3.10 {  thread_create A test.db  thread_compile A {SELECT a FROM t1 LIMIT 1}  thread_step A  thread_finalize A  set DB [thread_db_get A]  thread_halt A} {}do_test thread2-3.11 {  set STMT [sqlite3_prepare $DB {SELECT a FROM t1 LIMIT 1} -1 TAIL]  sqlite3_step $STMT} SQLITE_ROWdo_test thread2-3.12 {  sqlite3_column_int $STMT 0} 1do_test thread2-3.13 {  sqlite3_finalize $STMT} SQLITE_OKdo_test thread2-3.14 {  sqlite3_close $DB} SQLITE_OKdo_test thread2-3.20 {  thread_create A test.db  thread_compile A {SELECT a FROM t1 LIMIT 3}  thread_step A  set STMT [thread_stmt_get A]  set DB [thread_db_get A]  thread_halt A} {}do_test thread2-3.21 {  sqlite3_step $STMT} SQLITE_ROWdo_test thread2-3.22 {  sqlite3_column_int $STMT 0} 2do_test thread2-3.23 {  # The unlock fails here.  But because we never check the return  # code from sqlite3OsUnlock (because we cannot do anything about it  # if it fails) we do not realize that an error has occurred.  sqlite3_finalize $STMT} SQLITE_OKdo_test thread2-3.25 {  sqlite3_close $DB} SQLITE_OKdo_test thread2-3.30 {  thread_create A test.db  thread_compile A {BEGIN}  thread_step A  thread_finalize A  thread_compile A {SELECT a FROM t1 LIMIT 1}  thread_step A  thread_finalize A  set DB [thread_db_get A]  thread_halt A} {}do_test thread2-3.31 {  set STMT [sqlite3_prepare $DB {INSERT INTO t1 VALUES(99,'error')} -1 TAIL]  sqlite3_step $STMT} SQLITE_ERRORdo_test thread2-3.32 {  sqlite3_finalize $STMT} SQLITE_MISUSEdo_test thread2-3.33 {  sqlite3_close $DB} SQLITE_OK# VERY important to set the override flag back to its true value.#set threadsOverrideEachOthersLocks $orig_threadOverride# Also important to halt the worker threads, which are using spin# locks and eating away CPU cycles.#thread_halt *   finish_test