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// **********************************************************************
//
// Copyright (c) 2001
// MutableRealms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#include <IceUtil/IceUtil.h>
#include <RWRecMutexTest.h>
#include <TestCommon.h>
using namespace std;
using namespace IceUtil;
static const std::string rwRecMutexTestName("read/write recursive mutex");
class RWRecMutexTestThread : public Thread
{
public:
RWRecMutexTestThread(RWRecMutex& m) :
_mutex(m),
_trylock(false)
{
}
void
waitTrylock()
{
Mutex::Lock lock(_trylockMutex);
while (!_trylock)
{
_trylockCond.wait(lock);
}
}
protected:
RWRecMutex& _mutex;
bool _trylock;
//
// Use native Condition variable here, not Monitor.
//
Cond _trylockCond;
Mutex _trylockMutex;
};
class RWRecMutexReadTestThread : public RWRecMutexTestThread
{
public:
RWRecMutexReadTestThread(RWRecMutex& m) :
RWRecMutexTestThread(m)
{
}
virtual void run()
{
try
{
RWRecMutex::TryRLock lock(_mutex);
// Expected
}
catch(const LockedException&)
{
test(false);
}
_trylock = true;
_trylockCond.signal();
RWRecMutex::RLock lock(_mutex);
}
};
class RWRecMutexWriteTestThread : public RWRecMutexTestThread
{
public:
RWRecMutexWriteTestThread(RWRecMutex& m) :
RWRecMutexTestThread(m)
{
}
virtual void run()
{
try
{
RWRecMutex::TryWLock lock(_mutex);
test(false);
}
catch(const LockedException&)
{
// Expected
}
_trylock = true;
_trylockCond.signal();
RWRecMutex::WLock lock(_mutex);
}
};
typedef Handle<RWRecMutexTestThread> RWRecMutexTestThreadPtr;
RWRecMutexTest::RWRecMutexTest() :
TestBase(rwRecMutexTestName)
{
}
void
RWRecMutexTest::run()
{
RWRecMutex mutex;
RWRecMutexTestThreadPtr t;
ThreadControl control;
// TEST: TryLock (read)
{
RWRecMutex::RLock rlock(mutex);
RWRecMutex::RLock rlock2(mutex);
try
{
RWRecMutex::TryRLock rlock2(mutex);
}
catch(const LockedException&)
{
test(false);
}
try
{
RWRecMutex::TryWLock wlock(mutex);
test(false);
}
catch(const LockedException&)
{
// Expected
}
}
// TEST: TryLock (write)
{
RWRecMutex::WLock wlock(mutex);
// TEST: TryLock
try
{
RWRecMutex::TryRLock rlock(mutex);
test(false);
}
catch(const LockedException&)
{
// Expected
}
try
{
RWRecMutex::TryWLock wlock(mutex);
test(false);
}
catch(const LockedException&)
{
// Expected
}
}
// TEST: read lock
{
RWRecMutex::RLock rlock(mutex);
// TEST: Start thread, try to acquire the mutex.
t = new RWRecMutexReadTestThread(mutex);
control = t->start();
// TEST: Wait until the trylock has been tested.
t->waitTrylock();
}
//
// TEST: Once the mutex has been released, the thread should
// acquire the mutex and then terminate.
//
control.join();
// TEST: write lock
{
RWRecMutex::WLock wlock(mutex);
// TEST: Start thread, try to acquire the mutex.
t = new RWRecMutexWriteTestThread(mutex);
control = t->start();
// TEST: Wait until the trylock has been tested.
t->waitTrylock();
}
//
// TEST: Once the mutex has been released, the thread should
// acquire the mutex and then terminate.
//
control.join();
// TEST: Lock precedence. Writers have precedence over readers.
{
RWRecMutex::RLock rlock(mutex);
// Start thread that tries to acquire write lock
t = new RWRecMutexWriteTestThread(mutex);
control = t->start();
// TEST: Wait until the trylock has been tested. The thread is
// now waiting on a write lock.
t->waitTrylock();
// It's necessary for a small sleep here to ensure that the
// thread is actually waiting on a write lock.
ThreadControl::sleep(1000);
try
{
RWRecMutex::TryRLock rlock2(mutex);
test(false);
}
catch(const LockedException&)
{
// Expected
}
}
//
// TEST: Once the mutex has been released, the thread should
// acquire the mutex and then terminate.
//
control.join();
}
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