TEST(TestMultipleSharedSection, General)
{
CSharedSection sec;
CEvent event;
std::atomic<long> mutex(0L);
locker<CSharedLock> l1(sec,&mutex, &event);
{
CSharedLock lock(sec);
thread waitThread1(l1);
EXPECT_TRUE(waitForThread(mutex,1,10000));
SleepMillis(10);
EXPECT_TRUE(l1.haslock);
event.Set();
EXPECT_TRUE(waitThread1.timed_join(MILLIS(10000)));
}
locker<CSharedLock> l2(sec,&mutex,&event);
locker<CSharedLock> l3(sec,&mutex,&event);
locker<CSharedLock> l4(sec,&mutex,&event);
locker<CSharedLock> l5(sec,&mutex,&event);
{
CExclusiveLock lock(sec);
thread waitThread1(l2);
thread waitThread2(l3);
thread waitThread3(l4);
thread waitThread4(l5);
EXPECT_TRUE(waitForThread(mutex,4,10000));
SleepMillis(10);
EXPECT_TRUE(!l2.haslock);
EXPECT_TRUE(!l3.haslock);
EXPECT_TRUE(!l4.haslock);
EXPECT_TRUE(!l5.haslock);
lock.Leave();
EXPECT_TRUE(waitForWaiters(event,4,10000));
EXPECT_TRUE(l2.haslock);
EXPECT_TRUE(l3.haslock);
EXPECT_TRUE(l4.haslock);
EXPECT_TRUE(l5.haslock);
event.Set();
EXPECT_TRUE(waitThread1.timed_join(MILLIS(10000)));
EXPECT_TRUE(waitThread2.timed_join(MILLIS(10000)));
EXPECT_TRUE(waitThread3.timed_join(MILLIS(10000)));
EXPECT_TRUE(waitThread4.timed_join(MILLIS(10000)));
}
}
TEST(TestSharedSection, GetSharedLockWhileTryingExclusiveLock)
{
std::atomic<long> mutex(0L);
CEvent event;
CSharedSection sec;
CSharedLock l1(sec); // get a shared lock
locker<CExclusiveLock> l2(sec,&mutex);
thread waitThread1(l2); // try to get an exclusive lock
EXPECT_TRUE(waitForThread(mutex,1,10000));
SleepMillis(10); // still need to give it a chance to move ahead
EXPECT_TRUE(!l2.haslock); // this thread is waiting ...
EXPECT_TRUE(!l2.obtainedlock); // this thread is waiting ...
// now try and get a SharedLock
locker<CSharedLock> l3(sec,&mutex,&event);
thread waitThread3(l3); // try to get a shared lock
EXPECT_TRUE(waitForThread(mutex,2,10000));
SleepMillis(10);
EXPECT_TRUE(l3.haslock);
event.Set();
EXPECT_TRUE(waitThread3.timed_join(MILLIS(10000)));
// l3 should have released.
EXPECT_TRUE(!l3.haslock);
// but the exclusive lock should still not have happened
EXPECT_TRUE(!l2.haslock); // this thread is waiting ...
EXPECT_TRUE(!l2.obtainedlock); // this thread is waiting ...
// let it go
l1.Leave(); // the last shared lock leaves.
EXPECT_TRUE(waitThread1.timed_join(MILLIS(10000)));
EXPECT_TRUE(l2.obtainedlock); // the exclusive lock was captured
EXPECT_TRUE(!l2.haslock); // ... but it doesn't have it anymore
}
TEST(TestSharedSection, TwoCase)
{
CSharedSection sec;
CEvent event;
std::atomic<long> mutex(0L);
locker<CSharedLock> l1(sec,&mutex,&event);
{
CSharedLock lock(sec);
thread waitThread1(l1);
EXPECT_TRUE(waitForWaiters(event,1,10000));
EXPECT_TRUE(l1.haslock);
event.Set();
EXPECT_TRUE(waitThread1.timed_join(MILLIS(10000)));
}
locker<CSharedLock> l2(sec,&mutex,&event);
{
CExclusiveLock lock(sec); // get exclusive lock
thread waitThread2(l2); // thread should block
EXPECT_TRUE(waitForThread(mutex,1,10000));
SleepMillis(10);
EXPECT_TRUE(!l2.haslock);
lock.Leave();
EXPECT_TRUE(waitForWaiters(event,1,10000));
SleepMillis(10);
EXPECT_TRUE(l2.haslock);
event.Set();
EXPECT_TRUE(waitThread2.timed_join(MILLIS(10000)));
}
}
/* fake loss measures */
int fake_loss_measure_data()
{
struct timeval tv; /* measuring time */
int elapsed; /* elapsed time */
int speed;
if (counter == 0)
{
gettimeofday(&tv0, 0);
}
diag_os_millisleep(250);
/* get elapsed time */
gettimeofday(&tv, 0);
elapsed = MILLIS(tv) - MILLIS(tv0);
elapsed += 11000;
if (elapsed < 11983) speed = 89*10000/36;
else if (elapsed < 12723) speed = 88*10000/36;
else if (elapsed < 13473) speed = 87*10000/36;
else if (elapsed < 14713) speed = 85*10000/36;
else if (elapsed < 15713) speed = 84*10000/36;
else if (elapsed < 16213) speed = 83*10000/36;
else if (elapsed < 16963) speed = 82*10000/36;
else if (elapsed < 17463) speed = 81*10000/36;
else if (elapsed < 18463) speed = 80*10000/36;
else if (elapsed < 19463) speed = 79*10000/36;
else if (elapsed < 20213) speed = 78*10000/36;
else if (elapsed < 20963) speed = 77*10000/36;
else if (elapsed < 22463) speed = 76*10000/36;
else if (elapsed < 22963) speed = 75*10000/36;
else if (elapsed < 23713) speed = 74*10000/36;
else if (elapsed < 25213) speed = 73*10000/36;
else if (elapsed < 26453) speed = 72*10000/36;
else if (elapsed < 27203) speed = 71*10000/36;
else if (elapsed < 27953) speed = 70*10000/36;
else if (elapsed < 29193) speed = 69*10000/36;
else if (elapsed < 29943) speed = 68*10000/36;
else if (elapsed < 30693) speed = 67*10000/36;
else if (elapsed < 32183) speed = 66*10000/36;
else if (elapsed < 32933) speed = 65*10000/36;
else if (elapsed < 33683) speed = 64*10000/36;
else if (elapsed < 34683) speed = 63*10000/36;
else if (elapsed < 35433) speed = 62*10000/36;
else if (elapsed < 36433) speed = 61*10000/36;
else if (elapsed < 37183) speed = 60*10000/36;
else if (elapsed < 38433) speed = 59*10000/36;
else if (elapsed < 39433) speed = 58*10000/36;
else if (elapsed < 40183) speed = 57*10000/36;
else if (elapsed < 40683) speed = 56*10000/36;
else if (elapsed < 42183) speed = 55*10000/36;
else if (elapsed < 43183) speed = 54*10000/36;
else if (elapsed < 44683) speed = 53*10000/36;
else if (elapsed < 45933) speed = 52*10000/36;
else if (elapsed < 47183) speed = 51*10000/36;
else if (elapsed < 48183) speed = 50*10000/36;
else if (elapsed < 49433) speed = 49*10000/36;
else speed = 48*10000/36;
counter++;
return (speed);
}