tests/thread/atomic.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/thread/atomic.cpp
   3 // Purpose:     wxAtomic??? unit test
   4 // Author:      Armel Asselin
   5 // Created:     2006-12-14
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 Armel Asselin
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #ifndef WX_PRECOMP
  21 #endif // WX_PRECOMP
  22
  23 #include "wx/atomic.h"
  24 #include "wx/thread.h"
  25 #include "wx/dynarray.h"
  26 #include "wx/log.h"
  27
  28 WX_DEFINE_ARRAY_PTR(wxThread *, wxArrayThread);
  29
  30 // ----------------------------------------------------------------------------
  31 // constants
  32 // ----------------------------------------------------------------------------
  33
  34 // number of times to run the loops: the code takes too long to run if we use
  35 // the bigger value with generic atomic operations implementation
  36 #ifdef wxHAS_ATOMIC_OPS
  37     static const wxInt32 ITERATIONS_NUM = 10000000;
  38 #else
  39     static const wxInt32 ITERATIONS_NUM = 1000;
  40 #endif
  41
  42 // ----------------------------------------------------------------------------
  43 // test class
  44 // ----------------------------------------------------------------------------
  45
  46 class AtomicTestCase : public CppUnit::TestCase
  47 {
  48 public:
  49     AtomicTestCase() { }
  50
  51     enum ETestType
  52     {
  53         IncAndDecMixed,
  54         IncOnly,
  55         DecOnly
  56     };
  57
  58 private:
  59     class MyThread : public wxThread
  60     {
  61     public:
  62         MyThread(wxAtomicInt &operateOn, ETestType testType) : wxThread(wxTHREAD_JOINABLE),
  63             m_operateOn(operateOn), m_testType(testType) {}
  64
  65         // thread execution starts here
  66         virtual void *Entry();
  67
  68     public:
  69         wxAtomicInt &m_operateOn;
  70         ETestType m_testType;
  71     };
  72
  73     CPPUNIT_TEST_SUITE( AtomicTestCase );
  74         CPPUNIT_TEST( TestNoThread );
  75         CPPUNIT_TEST( TestDecReturn );
  76         CPPUNIT_TEST( TestTwoThreadsMix );
  77         CPPUNIT_TEST( TestTenThreadsMix );
  78         CPPUNIT_TEST( TestTwoThreadsSeparate );
  79         CPPUNIT_TEST( TestTenThreadsSeparate );
  80     CPPUNIT_TEST_SUITE_END();
  81
  82     void TestNoThread();
  83     void TestDecReturn();
  84     void TestTenThreadsMix() { TestWithThreads(10, IncAndDecMixed); }
  85     void TestTwoThreadsMix() { TestWithThreads(2, IncAndDecMixed); }
  86     void TestTenThreadsSeparate() { TestWithThreads(10, IncOnly); }
  87     void TestTwoThreadsSeparate() { TestWithThreads(2, IncOnly); }
  88     void TestWithThreads(int count, ETestType testtype);
  89
  90     DECLARE_NO_COPY_CLASS(AtomicTestCase)
  91 };
  92
  93 // register in the unnamed registry so that these tests are run by default
  94 CPPUNIT_TEST_SUITE_REGISTRATION( AtomicTestCase );
  95
  96 // also include in it's own registry so that these tests can be run alone
  97 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( AtomicTestCase, "AtomicTestCase" );
  98
  99 void AtomicTestCase::TestNoThread()
 100 {
 101     wxAtomicInt int1 = 0,
 102                 int2 = 0;
 103
 104     for ( wxInt32 i = 0; i < ITERATIONS_NUM; ++i )
 105     {
 106         wxAtomicInc(int1);
 107         wxAtomicDec(int2);
 108     }
 109
 110     CPPUNIT_ASSERT( int1 == ITERATIONS_NUM );
 111     CPPUNIT_ASSERT( int2 == -ITERATIONS_NUM );
 112 }
 113
 114 void AtomicTestCase::TestDecReturn()
 115 {
 116     wxAtomicInt i(0);
 117     wxAtomicInc(i);
 118     wxAtomicInc(i);
 119     CPPUNIT_ASSERT( i == 2 );
 120
 121     CPPUNIT_ASSERT( wxAtomicDec(i) > 0 );
 122     CPPUNIT_ASSERT( wxAtomicDec(i) == 0 );
 123 }
 124
 125 void AtomicTestCase::TestWithThreads(int count, ETestType testType)
 126 {
 127     wxAtomicInt    int1=0;
 128
 129     wxArrayThread  threads;
 130
 131     int i;
 132     for ( i = 0; i < count; ++i )
 133     {
 134         ETestType actualThreadType;
 135         switch(testType)
 136         {
 137         default:
 138             actualThreadType = testType;
 139             break;
 140         case IncOnly:
 141             actualThreadType =  (i&1)==0 ? IncOnly : DecOnly;
 142             break;
 143         }
 144
 145         MyThread *thread = new MyThread(int1, actualThreadType);
 146
 147         if ( thread->Create() != wxTHREAD_NO_ERROR )
 148         {
 149             wxLogError(wxT("Can't create thread!"));
 150         }
 151         else
 152             threads.Add(thread);
 153     }
 154
 155     for ( i = 0; i < count; ++i )
 156     {
 157         threads[i]->Run();
 158     }
 159
 160
 161     for ( i = 0; i < count; ++i )
 162     {
 163         // each thread should return 0, else it detected some problem
 164         CPPUNIT_ASSERT (threads[i]->Wait() == (wxThread::ExitCode)0);
 165     }
 166
 167     CPPUNIT_ASSERT( int1 == 0 );
 168 }
 169
 170 // ----------------------------------------------------------------------------
 171
 172 void *AtomicTestCase::MyThread::Entry()
 173 {
 174     wxInt32 negativeValuesSeen = 0;
 175
 176     for ( wxInt32 i = 0; i < ITERATIONS_NUM; ++i )
 177     {
 178         switch ( m_testType )
 179         {
 180             case AtomicTestCase::IncAndDecMixed:
 181                 wxAtomicInc(m_operateOn);
 182                 wxAtomicDec(m_operateOn);
 183
 184                 if (m_operateOn < 0)
 185                     ++negativeValuesSeen;
 186                 break;
 187
 188             case AtomicTestCase::IncOnly:
 189                 wxAtomicInc(m_operateOn);
 190                 break;
 191
 192             case AtomicTestCase::DecOnly:
 193                 wxAtomicDec(m_operateOn);
 194                 break;
 195         }
 196     }
 197
 198     return wxUIntToPtr(negativeValuesSeen);
 199 }