bool RandomizeMutexOrder( LevelMutexInfo::MutexContainer & mutexes )
{
unsigned int count = mutexes.size();
if ( count < 2 )
return false;
LevelMutexInfo::MutexContainer randomMutexes;
for ( unsigned int ii = 0; ii < count; ++ii )
{
volatile LevelMutexInfo * mutex = nullptr;
const unsigned int sizeNow = mutexes.size();
if ( 1 < sizeNow )
{
unsigned int index = ( ::rand() % sizeNow );
mutex = mutexes[ index ];
if ( index < sizeNow - 1 )
mutexes[ index ] = mutexes[ sizeNow - 1 ];
}
else
{
mutex = mutexes[ 0 ];
}
mutexes.pop_back();
randomMutexes.push_back( mutex );
}
mutexes = randomMutexes;
return true;
}
void UnlockThese( SomeThingPool & pool )
{
const unsigned int count = pool.size();
assert( 0 != count );
SortByLevel( pool );
volatile SomeThing * thing = pool[ 0 ];
assert( NULL != thing );
unsigned int level = thing->GetLevel();
LevelMutexInfo::MutexContainer mutexes;
MutexErrors::Type result = MutexErrors::Success;
unsigned int ii = 0;
for ( ii = 0; ii < count; ++ii )
{
thing = pool[ ii ];
assert( NULL != thing );
if ( level != thing->GetLevel() )
{
assert( mutexes.size() != 0 );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( result == MutexErrors::Success );
mutexes.clear();
level = thing->GetLevel();
}
mutexes.push_back( &thing->GetMutex() );
}
assert( mutexes.size() != 0 );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( result == MutexErrors::Success );
for ( ii = 0; ii < count; ++ii )
{
thing = pool[ ii ];
assert( NULL != thing );
assert( !thing->GetMutex().IsLockedByCurrentThread() );
}
}
void * MultiLockRandomSafeThread( void * p )
{
const unsigned int value = reinterpret_cast< unsigned int >( p );
unsigned int testCount = 0;
unsigned int failCount = 0;
volatile Thing * thing = nullptr;
Thing::ThingPool pool;
LevelMutexInfo::MutexContainer mutexes;
mutexes.reserve( thingCount );
unsigned int jj = 0;
unsigned int place = 0;
try
{
for ( unsigned int ii = 0; ii < thingCount; ++ii )
{
pool.clear();
pool.reserve( thingCount );
for ( place = 0; place < thingCount; ++place )
{
place += ::rand() % 3;
if ( thingCount <= place )
break;
thing = Thing::GetFromPool( place );
assert( nullptr != thing );
pool.push_back( thing );
}
const unsigned int poolCount = pool.size();
mutexes.clear();
for ( jj = 0; jj < poolCount; ++jj )
{
thing = pool[ jj ];
assert( nullptr != thing );
mutexes.push_back( &thing->GetMutex() );
}
MultiMutexLocker locker( mutexes );
(void)locker;
for ( jj = 0; jj < poolCount; ++jj )
{
thing = pool[ jj ];
assert( nullptr != thing );
thing->SetValue( value );
}
::GoToSleep( 3 );
for ( jj = 0; jj < poolCount; ++jj )
{
thing = pool[ jj ];
assert( nullptr != thing );
if ( thing->GetValue() != value )
failCount++;
testCount++;
}
}
}
catch ( ... )
{
assert( false );
}
TestResults::GetIt()->SetResult( value, testCount, failCount );
return nullptr;
}
void SingleThreadComplexMultiLockTest( bool doSetup )
{
::srand( static_cast< unsigned int >( time( nullptr ) ) );
if ( doSetup )
{
Thing::MakePool( thingCount );
}
const unsigned int priorLevel = GetCurrentThreadsLevel();
const unsigned int priorLockCount = CountLocksInCurrentThread();
const unsigned int priorMutexCount = CountMutexesInCurrentThread();
const unsigned int priorLevelMutexCount = CountMutexesAtCurrentLevel();
if ( LevelMutexInfo::UnlockedLevel == priorLevel )
{
assert( priorLockCount == 0 );
assert( priorMutexCount == 0 );
assert( priorLevelMutexCount == 0 );
}
else
{
assert( priorLockCount != 0 );
assert( priorMutexCount != 0 );
assert( priorLevelMutexCount != 0 );
assert( priorLevelMutexCount <= priorMutexCount );
assert( priorMutexCount <= priorLockCount );
}
volatile Thing * thing0 = Thing::GetFromPool( 0 );
volatile Thing * thing1 = Thing::GetFromPool( 1 );
volatile Thing * thing2 = Thing::GetFromPool( 2 );
volatile Thing * thing3 = Thing::GetFromPool( 3 );
volatile Thing * thing4 = Thing::GetFromPool( 4 );
volatile Thing * thing5 = Thing::GetFromPool( 5 );
volatile Thing * thing6 = Thing::GetFromPool( 6 );
volatile Thing * thing7 = Thing::GetFromPool( 7 );
assert( nullptr != thing0 );
assert( nullptr != thing1 );
assert( nullptr != thing2 );
assert( nullptr != thing3 );
assert( nullptr != thing4 );
assert( nullptr != thing5 );
assert( nullptr != thing6 );
assert( nullptr != thing7 );
LevelMutexInfo::MutexContainer mutexes;
mutexes.reserve( thingCount );
MutexErrors::Type result = LevelMutexInfo::MultiLock( mutexes );
assert( result == MutexErrors::EmptyContainer );
mutexes.push_back( &thing0->GetMutex() );
mutexes.push_back( &thing1->GetMutex() );
mutexes.push_back( &thing2->GetMutex() );
mutexes.push_back( &thing3->GetMutex() );
mutexes.push_back( &thing4->GetMutex() );
mutexes.push_back( &thing5->GetMutex() );
mutexes.push_back( &thing6->GetMutex() );
mutexes.push_back( &thing7->GetMutex() );
result = LevelMutexInfo::MultiLock( mutexes );
assert( result == MutexErrors::Success );
assert( GetCurrentThreadsLevel() == thing0->GetMutex().GetLevel() );
assert( CountLocksInCurrentThread() == priorLockCount + thingCount );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( result == MutexErrors::Success );
assert( GetCurrentThreadsLevel() == priorLevel );
assert( CountLocksInCurrentThread() == priorLockCount );
assert( CountMutexesInCurrentThread() == priorMutexCount );
assert( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
mutexes.clear();
mutexes.push_back( &thing7->GetMutex() );
mutexes.push_back( &thing6->GetMutex() );
mutexes.push_back( &thing5->GetMutex() );
mutexes.push_back( &thing4->GetMutex() );
mutexes.push_back( &thing3->GetMutex() );
mutexes.push_back( &thing2->GetMutex() );
mutexes.push_back( &thing1->GetMutex() );
mutexes.push_back( &thing0->GetMutex() );
result = LevelMutexInfo::MultiLock( mutexes );
assert( result == MutexErrors::Success );
assert( GetCurrentThreadsLevel() == thing0->GetMutex().GetLevel() );
assert( CountLocksInCurrentThread() == priorLockCount + thingCount );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( result == MutexErrors::Success );
assert( GetCurrentThreadsLevel() == priorLevel );
assert( CountLocksInCurrentThread() == priorLockCount );
assert( CountMutexesInCurrentThread() == priorMutexCount );
assert( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
RandomizeMutexOrder( mutexes );
result = LevelMutexInfo::MultiLock( mutexes );
assert( result == MutexErrors::Success );
assert( GetCurrentThreadsLevel() == thing0->GetMutex().GetLevel() );
assert( CountLocksInCurrentThread() == priorLockCount + thingCount );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( result == MutexErrors::Success );
assert( GetCurrentThreadsLevel() == priorLevel );
assert( CountLocksInCurrentThread() == priorLockCount );
assert( CountMutexesInCurrentThread() == priorMutexCount );
assert( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
if ( doSetup )
Thing::DestroyPool();
}
void SingleThreadExceptionTest( void )
{
cout << "Starting SingleThreadExceptionTest." << endl;
const unsigned int priorLevel = GetCurrentThreadsLevel();
const unsigned int priorLockCount = CountLocksInCurrentThread();
const unsigned int priorMutexCount = CountMutexesInCurrentThread();
const unsigned int priorLevelMutexCount = CountMutexesAtCurrentLevel();
if ( LevelMutexInfo::UnlockedLevel == priorLevel )
{
assert( priorLockCount == 0 );
assert( priorMutexCount == 0 );
assert( priorLevelMutexCount == 0 );
}
else
{
assert( priorLockCount != 0 );
assert( priorMutexCount != 0 );
assert( priorLevelMutexCount != 0 );
assert( priorLevelMutexCount <= priorMutexCount );
assert( priorMutexCount <= priorLockCount );
}
ExceptionMutex mutex1a( 1 );
mutex1a.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Always );
ExceptionMutex mutex2a( 2 );
mutex2a.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
MutexErrors::Type result = MutexErrors::Success;
try
{
mutex1a.Lock();
assert( false );
}
catch ( ... )
{
assert( true );
}
try
{
result = mutex2a.Lock();
assert( MutexErrors::Success == result );
mutex1a.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
result = mutex1a.Lock();
assert( MutexErrors::Success == result );
result = mutex1a.Unlock();
assert( MutexErrors::Success == result );
result = mutex2a.Unlock();
assert( MutexErrors::Success == result );
}
catch ( ... )
{
assert( false );
}
ExceptionMutex mutex2b( 2 );
mutex2b.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Always );
ExceptionMutex mutex2c( 2 );
mutex2c.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
ExceptionMutex mutex2d( 2 );
mutex2d.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
LevelMutexInfo::MutexContainer mutexes;
try
{
mutexes.push_back( &mutex2a );
mutexes.push_back( &mutex2b );
mutexes.push_back( &mutex2c );
mutexes.push_back( &mutex2d );
result = LevelMutexInfo::MultiLock( mutexes );
assert( false );
}
catch ( ... )
{
assert( true );
}
bool okay = ( !mutex2a.IsLockedByCurrentThread() );
assert( okay );
okay = ( !mutex2b.IsLockedByCurrentThread() );
assert( okay );
okay = ( !mutex2c.IsLockedByCurrentThread() );
assert( okay );
okay = ( !mutex2d.IsLockedByCurrentThread() );
assert( okay );
mutex2b.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
ExceptionMutex mutex3a( 3 );
mutex3a.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
ExceptionMutex mutex3b( 3 );
mutex3b.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Never );
mutexes.clear();
try
{
mutexes.push_back( &mutex3a );
mutexes.push_back( &mutex3b );
result = LevelMutexInfo::MultiLock( mutexes ); // 3a, 3b
assert( true );
assert( MutexErrors::Success == result );
okay = ( mutex3a.IsLockedByCurrentThread() );
assert( okay );
okay = ( mutex3b.IsLockedByCurrentThread() );
assert( okay );
}
catch ( ... )
{
assert( false );
}
try
{
mutex2c.GetMutexPolicy().SetTossPolicy( ExceptionTossingMutex::Always );
mutexes.clear();
mutexes.push_back( &mutex2a );
mutexes.push_back( &mutex2b );
mutexes.push_back( &mutex2c );
mutexes.push_back( &mutex2d );
result = LevelMutexInfo::MultiLock( mutexes );
assert( false );
}
catch ( ... )
{
assert( true );
okay = ( !mutex2a.IsLockedByCurrentThread() );
assert( okay );
okay = ( !mutex2b.IsLockedByCurrentThread() );
assert( okay );
okay = ( !mutex2c.IsLockedByCurrentThread() );
assert( okay );
okay = ( !mutex2d.IsLockedByCurrentThread() );
assert( okay );
okay = ( mutex3a.IsLockedByCurrentThread() );
assert( okay );
okay = ( mutex3b.IsLockedByCurrentThread() );
assert( okay );
}
mutexes.clear();
mutexes.push_back( &mutex3a );
mutexes.push_back( &mutex3b );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( MutexErrors::Success == result );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
okay = ( CountLocksInCurrentThread() == priorLockCount );
assert( okay );
okay = ( CountMutexesInCurrentThread() == priorMutexCount );
assert( okay );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
cout << "Finished SingleThreadExceptionTest." << endl;
}
void SingleThreadSimpleMultiLockTest( void )
{
cout << "Finished SingleThreadSimpleMultiLockTest." << endl;
const unsigned int priorLevel = GetCurrentThreadsLevel();
const unsigned int priorLockCount = CountLocksInCurrentThread();
const unsigned int priorMutexCount = CountMutexesInCurrentThread();
const unsigned int priorLevelMutexCount = CountMutexesAtCurrentLevel();
if ( LevelMutexInfo::UnlockedLevel == priorLevel )
{
assert( priorLockCount == 0 );
assert( priorMutexCount == 0 );
assert( priorLevelMutexCount == 0 );
}
else
{
assert( priorLockCount != 0 );
assert( priorMutexCount != 0 );
assert( priorLevelMutexCount != 0 );
assert( priorLevelMutexCount <= priorMutexCount );
assert( priorMutexCount <= priorLockCount );
}
SpinMutex mutex1( 1 );
SpinMutex mutex2( 1 );
bool okay = ( mutex2.GetLevel() == mutex1.GetLevel() );
assert( okay );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
LevelMutexInfo::MutexContainer mutexes;
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
MutexErrors::Type result = LevelMutexInfo::MultiLock( mutexes ); // locks: 1, 2
assert( MutexErrors::Success == result );
okay = ( GetCurrentThreadsLevel() == mutex1.GetLevel() );
assert( okay );
result = LevelMutexInfo::MultiUnlock( mutexes ); // locks: none
assert( MutexErrors::Success == result );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
mutexes.push_back( &mutex1 );
result = LevelMutexInfo::MultiLock( mutexes ); // locks: none
assert( MutexErrors::DuplicateMutex == result );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( nullptr );
mutexes.push_back( &mutex2 );
result = LevelMutexInfo::MultiLock( mutexes ); // locks: none
assert( MutexErrors::NullMutexPointer == result );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
SpinMutex mutex3( 3 );
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
mutexes.push_back( &mutex3 );
result = LevelMutexInfo::MultiLock( mutexes ); // locks: none
assert( MutexErrors::WrongLevel == result );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
result = mutex1.Lock(); // locks: 1
assert( MutexErrors::Success == result );
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
try
{
result = LevelMutexInfo::MultiLock( mutexes ); // locks: 1
}
catch ( const MutexException & ex1 )
{
assert( MutexErrors::LevelTooHigh == ex1.GetReason() );
}
catch ( ... )
{
assert( false );
}
result = mutex1.Unlock(); // locks: none
assert( MutexErrors::Success == result );
result = LevelMutexInfo::MultiLock( mutexes ); // locks: 1, 2
assert( MutexErrors::Success == result );
const bool m1IsFirst = ( &mutex1 > &mutex2 );
LevelMutexInfo * first = ( m1IsFirst ) ? &mutex1 : &mutex2;
LevelMutexInfo * second = ( m1IsFirst ) ? &mutex2 : &mutex1;
result = first->Unlock(); // locks: 2
assert( MutexErrors::Success == result );
result = LevelMutexInfo::MultiUnlock( mutexes ); // locks: 2
assert( MutexErrors::NotRecentLock == result );
result = second->Unlock(); // locks: none
assert( MutexErrors::Success == result );
// Now combine some calls to TryLock with a call to MultiLock.
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
result = LevelMutexInfo::MultiLock( mutexes ); // locks: 1, 2
assert( MutexErrors::Success == result );
result = mutex2.TryLock(); // locks: 1, 2+
assert( MutexErrors::Success == result );
okay = ( mutex2.GetLockCount() == 2 );
assert( okay );
result = mutex2.Unlock(); // locks: 1, 2
assert( MutexErrors::Success == result );
result = mutex1.TryLock(); // locks: 1+, 2
assert( result == MutexErrors::Success );
okay = ( mutex1.GetLockCount() == 2 );
assert( okay );
result = mutex2.TryLock(); // locks: 1+, 2+
assert( result == MutexErrors::Success );
okay = ( mutex2.GetLockCount() == 2 );
assert( okay );
result = mutex2.Unlock(); // locks: 1+, 2
assert( MutexErrors::Success == result );
result = mutex1.Unlock(); // locks: 1, 2
assert( MutexErrors::Success == result );
result = LevelMutexInfo::MultiUnlock( mutexes ); // locks: 1, 2
assert( MutexErrors::Success == result );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
SpinMutex mutex4( 1 );
result = mutex4.Lock();
assert( MutexErrors::Success == result );
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
try
{
result = LevelMutexInfo::MultiLock( mutexes );
}
catch ( const MutexException & ex1 )
{
assert( MutexErrors::LevelTooHigh == ex1.GetReason() );
}
catch ( ... )
{
assert( false );
}
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex4 );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( MutexErrors::NotRecentLock == result );
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( MutexErrors::NotRecentLock == result );
result = mutex4.Unlock();
assert( MutexErrors::Success == result );
// Make sure current thread has released locks acquired in this function.
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
// What if this tries to unlock multiple mutexes when nothing is locked?
mutexes.clear();
mutexes.push_back( &mutex1 );
mutexes.push_back( &mutex2 );
result = LevelMutexInfo::MultiUnlock( mutexes );
assert( MutexErrors::NotRecentLock == result );
okay = ( GetCurrentThreadsLevel() == priorLevel );
assert( okay );
okay = ( CountLocksInCurrentThread() == priorLockCount );
assert( okay );
okay = ( CountMutexesInCurrentThread() == priorMutexCount );
assert( okay );
okay = ( CountMutexesAtCurrentLevel() == priorLevelMutexCount );
assert( okay );
cout << "Finished SingleThreadSimpleMultiLockTest." << endl;
}