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sqlite3

    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 1.1.1.1 2012/02/21 17:04:16 misho Exp $
   15: 
   16: 
   17: set testdir [file dirname $argv0]
   18: source $testdir/tester.tcl
   19: 
   20: # Skip this whole file if the thread testing code is not enabled
   21: #
   22: if {[run_thread_tests]==0} { finish_test ; return }
   23: if {[llength [info command thread_step]]==0 || [sqlite3 -has-codec]} {
   24:   finish_test
   25:   return
   26: }
   27: 
   28: # Create some data to work with
   29: #
   30: do_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: #
   52: do_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
   60: do_test thread1-1.3 {
   61:   thread_argc A
   62: } 1
   63: do_test thread1-1.4 {
   64:   thread_argv A 0
   65: } 1
   66: do_test thread1-1.5 {
   67:   thread_compile B {SELECT b FROM t1}
   68:   thread_step B
   69:   thread_result B
   70: } SQLITE_ROW
   71: do_test thread1-1.6 {
   72:   thread_argc B
   73: } 1
   74: do_test thread1-1.7 {
   75:   thread_argv B 0
   76: } abcdefgh
   77: do_test thread1-1.8 {
   78:   thread_finalize A
   79:   thread_result A
   80: } SQLITE_OK
   81: do_test thread1-1.9 {
   82:   thread_finalize B
   83:   thread_result B
   84: } SQLITE_OK
   85: do_test thread1-1.10 {
   86:   thread_compile C {CREATE TABLE t2(x,y)}
   87:   thread_step C
   88:   thread_result C
   89: } SQLITE_DONE
   90: do_test thread1-1.11 {
   91:   thread_finalize C
   92:   thread_result C
   93: } SQLITE_OK
   94: do_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: #
  115: do_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
  122: do_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
  128: do_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: 
  137: do_test thread1-2.4 {
  138:   execsql {SELECT * FROM t2}
  139: } {}
  140: 
  141: do_test thread1-2.5 {
  142:   thread_finalize A
  143:   thread_result A
  144: } SQLITE_OK
  145: do_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
  152: do_test thread1-2.7 {
  153:   execsql {SELECT * FROM t2}
  154: } {}
  155: do_test thread1-2.8 {
  156:   thread_finalize B
  157:   thread_result B
  158: } SQLITE_OK
  159: do_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
  164: do_test thread1-2.10 {
  165:   thread_finalize C
  166:   thread_result C
  167: } SQLITE_OK
  168: do_test thread1-2.11 {
  169:   execsql {SELECT * FROM t2}
  170: } {98 99}
  171: 
  172: thread_halt *   
  173: finish_test