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///////////////////////////////////////////////////////////////////////////////
// Name: tests/thread/atomic.cpp
// Purpose: wxAtomic??? unit test
// Author: Armel Asselin
// Created: 2006-12-14
// 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"
#include "wx/log.h"
WX_DEFINE_ARRAY_PTR(wxThread *, wxArrayThread);
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// number of times to run the loops: the code takes too long to run if we use
// the bigger value with generic atomic operations implementation
#ifdef wxHAS_ATOMIC_OPS
static const wxInt32 ITERATIONS_NUM = 10000000;
#else
static const wxInt32 ITERATIONS_NUM = 1000;
#endif
// ----------------------------------------------------------------------------
// test class
// ----------------------------------------------------------------------------
class AtomicTestCase : public CppUnit::TestCase
{
public:
AtomicTestCase() { }
enum ETestType
{
IncAndDecMixed,
IncOnly,
DecOnly
};
private:
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( TestDecReturn );
CPPUNIT_TEST( TestTwoThreadsMix );
CPPUNIT_TEST( TestTenThreadsMix );
CPPUNIT_TEST( TestTwoThreadsSeparate );
CPPUNIT_TEST( TestTenThreadsSeparate );
CPPUNIT_TEST_SUITE_END();
void TestNoThread();
void TestDecReturn();
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 its 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 < ITERATIONS_NUM; ++i )
{
wxAtomicInc(int1);
wxAtomicDec(int2);
}
CPPUNIT_ASSERT( int1 == ITERATIONS_NUM );
CPPUNIT_ASSERT( int2 == -ITERATIONS_NUM );
}
void AtomicTestCase::TestDecReturn()
{
wxAtomicInt i(0);
wxAtomicInc(i);
wxAtomicInc(i);
CPPUNIT_ASSERT( i == 2 );
CPPUNIT_ASSERT( wxAtomicDec(i) > 0 );
CPPUNIT_ASSERT( wxAtomicDec(i) == 0 );
}
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 < ITERATIONS_NUM; ++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 wxUIntToPtr(negativeValuesSeen);
}
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