package org.multiverse.stms.gamma.transactionalobjects.orec;
import org.junit.Before;
import org.junit.Test;
import org.multiverse.api.exceptions.PanicError;
import org.multiverse.stms.gamma.GammaConstants;
import org.multiverse.stms.gamma.GammaStm;
import org.multiverse.stms.gamma.transactionalobjects.AbstractGammaObject;
import org.multiverse.stms.gamma.transactionalobjects.GammaTxnLong;
import static org.junit.Assert.fail;
import static org.multiverse.TestUtils.assertOrecValue;
import static org.multiverse.stms.gamma.GammaTestUtils.*;
public class Orec_departAfterReadingAndUnlockTest implements GammaConstants {
private GammaStm stm;
@Before
public void setUp() {
stm = new GammaStm();
}
@Test
public void writeBiased_whenSingleReadLock() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arriveAndLock(1, LOCKMODE_READ);
orec.departAfterReadingAndUnlock();
assertSurplus(orec, 0);
assertReadLockCount(orec, 0);
assertLockMode(orec, LOCKMODE_NONE);
}
@Test
public void writeBiased_whenMultipleReadLocks() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arriveAndLock(1, LOCKMODE_READ);
orec.arriveAndLock(1, LOCKMODE_READ);
orec.arriveAndLock(1, LOCKMODE_READ);
orec.departAfterReadingAndUnlock();
assertSurplus(orec, 2);
assertReadLockCount(orec, 2);
assertLockMode(orec, LOCKMODE_READ);
}
@Test
public void writeBiased_whenWriteLock() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arriveAndLock(1, LOCKMODE_WRITE);
orec.departAfterReadingAndUnlock();
assertSurplus(orec, 0);
assertReadLockCount(orec, 0);
assertLockMode(orec, LOCKMODE_NONE);
}
@Test
public void writeBiased_whenExclusiveLock() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arriveAndLock(1, LOCKMODE_EXCLUSIVE);
orec.departAfterReadingAndUnlock();
assertSurplus(orec, 0);
assertReadLockCount(orec, 0);
assertLockMode(orec, LOCKMODE_NONE);
}
@Test
public void writeBiased_whenMultipleArrivesAndLockedForCommit() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arrive(1);
orec.arrive(2);
orec.arriveAndLock(1, LOCKMODE_EXCLUSIVE);
orec.departAfterReadingAndUnlock();
assertSurplus(orec, 2);
assertLockMode(orec, LOCKMODE_NONE);
assertWriteBiased(orec);
assertReadonlyCount(orec, 1);
}
@Test
public void writeBiased_whenMultipleArrivesAndLockedForWrite() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arrive(1);
orec.arrive(2);
orec.arriveAndLock(1, LOCKMODE_WRITE);
orec.departAfterReadingAndUnlock();
assertSurplus(orec, 2);
assertLockMode(orec, LOCKMODE_NONE);
assertWriteBiased(orec);
assertReadonlyCount(orec, 1);
}
@Test
public void writeBiased_whenNotLockedAndNoSurplus_thenPanicError() {
AbstractGammaObject orec = new GammaTxnLong(stm);
long orecValue = orec.orec;
try {
orec.departAfterReadingAndUnlock();
fail();
} catch (PanicError expected) {
}
assertOrecValue(orec, orecValue);
}
// ======================= read biased =========================
@Test
public void readBiased_whenLocked() {
AbstractGammaObject orec = makeReadBiased(new GammaTxnLong(stm));
orec.arriveAndLock(1, LOCKMODE_EXCLUSIVE);
long orecValue = orec.orec;
try {
orec.departAfterReadingAndUnlock();
fail();
} catch (PanicError expected) {
}
assertOrecValue(orec, orecValue);
}
@Test
public void whenNotLockedAndSurplus_thenPanicError() {
AbstractGammaObject orec = new GammaTxnLong(stm);
orec.arrive(1);
long orecValue = orec.orec;
try {
orec.departAfterReadingAndUnlock();
fail();
} catch (PanicError expected) {
}
assertOrecValue(orec, orecValue);
}
}