public void MultipleAcquiresSemaphoreTest()
{
const int ACQUIRES = 10;
bool[] acquires = new bool[ACQUIRES];
Thread[] threads = new Thread[ACQUIRES];
SafeSemaphore sem = new SafeSemaphore(10, 10);
for (int i = 0; i < ACQUIRES; ++i)
{
threads[i] = new Thread((idx) => {
bool res;
do
{
res = sem.TryAcquire(1);
}while (!res);
acquires[(int)idx] = true;
});
threads[i].Start(i);
}
// check if all threads terminate
bool result = true;
for (int i = 0; i < ACQUIRES; ++i)
{
bool partial = threads[i].Join(2000);
if (!partial)
{
TerminateThread(threads[i]);
}
result = result && partial;
}
if (!result)
{
Assert.Fail("One or more threads not terminated!");
}
// check if all results are true
for (int i = 0; i < ACQUIRES; ++i)
{
if (!acquires[i])
{
Assert.Fail("Unsuccessful acquire!");
}
}
Assert.AreEqual(false, sem.TryAcquire(1));
}
public void TwoAcquiresOnOnePermitsSemaphoreTest()
{
int acquire1 = -1, acquire2 = -1;
Thread t = new Thread(() => {
SafeSemaphore sem = new SafeSemaphore(1, 1);
acquire1 = sem.TryAcquire(1) ? 1 : 0;
acquire2 = sem.TryAcquire(1) ? 1 : 0;
});
t.Start();
bool done = t.Join(2000);
if (!done)
{
TerminateThread(t);
Assert.Fail();
}
Assert.AreEqual(1, acquire1);
Assert.AreEqual(0, acquire2);
}