added wxAtomicInc/Dec() functions (patch 1739486)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47121 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/thread/atomic.cpp

@@ -0,0 +1,172 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        tests/thread/atomic.cpp
+// Purpose:     wxAtomic??? unit test
+// Author:      Armel Asselin
+// Created:     2006-12-14
+// RCS-ID:      $Id$
+// Copyright:   (c) 2006 Armel Asselin
+///////////////////////////////////////////////////////////////////////////////
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "testprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif // WX_PRECOMP
+
+#include "wx/atomic.h"
+#include "wx/thread.h"
+#include "wx/dynarray.h"
+WX_DEFINE_ARRAY_PTR(wxThread *, wxArrayThread);
+
+// ----------------------------------------------------------------------------
+// test class
+// ----------------------------------------------------------------------------
+
+class AtomicTestCase : public CppUnit::TestCase
+{
+public:
+    AtomicTestCase() { }
+
+private:
+
+    enum ETestType
+    {
+        IncAndDecMixed,
+        IncOnly,
+        DecOnly
+    };
+
+    class MyThread : public wxThread
+    {
+    public:
+        MyThread(wxAtomicInt &operateOn, ETestType testType) : wxThread(wxTHREAD_JOINABLE),
+            m_operateOn(operateOn), m_testType(testType) {}
+
+        // thread execution starts here
+        virtual void *Entry();
+
+    public:
+        wxAtomicInt &m_operateOn;
+        ETestType m_testType;
+    };
+
+    CPPUNIT_TEST_SUITE( AtomicTestCase );
+        CPPUNIT_TEST( TestNoThread );
+        CPPUNIT_TEST( TestTwoThreadsMix );
+        CPPUNIT_TEST( TestTenThreadsMix );
+        CPPUNIT_TEST( TestTwoThreadsSeparate );
+        CPPUNIT_TEST( TestTenThreadsSeparate );
+    CPPUNIT_TEST_SUITE_END();
+
+    void TestNoThread();
+    void TestTenThreadsMix() { TestWithThreads(10, IncAndDecMixed); }
+    void TestTwoThreadsMix() { TestWithThreads(2, IncAndDecMixed); }
+    void TestTenThreadsSeparate() { TestWithThreads(10, IncOnly); }
+    void TestTwoThreadsSeparate() { TestWithThreads(2, IncOnly); }
+    void TestWithThreads(int count, ETestType testtype);
+
+    DECLARE_NO_COPY_CLASS(AtomicTestCase)
+};
+
+// register in the unnamed registry so that these tests are run by default
+CPPUNIT_TEST_SUITE_REGISTRATION( AtomicTestCase );
+
+// also include in it's own registry so that these tests can be run alone
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( AtomicTestCase, "AtomicTestCase" );
+
+void AtomicTestCase::TestNoThread()
+{
+    wxAtomicInt    int1=0, int2=0;
+
+    for (wxInt32 i=0; i<10000000; ++i)
+    {
+        wxAtomicInc(int1);
+        wxAtomicDec(int2);
+    }
+
+    CPPUNIT_ASSERT( int1 == 10000000 );
+    CPPUNIT_ASSERT( int2 == -10000000 );
+}
+
+void AtomicTestCase::TestWithThreads(int count, ETestType testType)
+{
+    wxAtomicInt    int1=0;
+
+    wxArrayThread  threads;
+
+    int i;
+    for ( i = 0; i < count; ++i )
+    {
+        ETestType actualThreadType;
+        switch(testType)
+        {
+        default:
+            actualThreadType = testType;
+            break;
+        case IncOnly:
+            actualThreadType =  (i&1)==0 ? IncOnly : DecOnly;
+            break;
+        }
+
+        MyThread *thread = new MyThread(int1, actualThreadType);
+
+        if ( thread->Create() != wxTHREAD_NO_ERROR )
+        {
+            wxLogError(wxT("Can't create thread!"));
+        }
+        else
+            threads.Add(thread);
+    }
+
+    for ( i = 0; i < count; ++i )
+    {
+        threads[i]->Run();
+    }
+
+
+    for ( i = 0; i < count; ++i )
+    {
+        // each thread should return 0, else it detected some problem
+        CPPUNIT_ASSERT (threads[i]->Wait() == (wxThread::ExitCode)0);
+    }
+
+    CPPUNIT_ASSERT( int1 == 0 );
+}
+
+// ----------------------------------------------------------------------------
+
+void *AtomicTestCase::MyThread::Entry()
+{
+    wxInt32 negativeValuesSeen = 0;
+
+    for (wxInt32 i=0; i<10000000; ++i)
+    {
+        switch (m_testType)
+        {
+        case AtomicTestCase::IncAndDecMixed:
+            wxAtomicInc(m_operateOn);
+            wxAtomicDec(m_operateOn);
+
+            if (m_operateOn < 0)
+                ++negativeValuesSeen;
+            break;
+
+        case AtomicTestCase::IncOnly:
+            wxAtomicInc(m_operateOn);
+            break;
+
+        case AtomicTestCase::DecOnly:
+            wxAtomicDec(m_operateOn);
+            break;
+        }
+    }
+
+    return (wxThread::ExitCode)negativeValuesSeen;
+}