本文整理汇总了C++中LockManager::isLocked方法的典型用法代码示例。如果您正苦于以下问题：C++ LockManager::isLocked方法的具体用法？C++ LockManager::isLocked怎么用？C++ LockManager::isLocked使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类LockManager的用法示例。
在下文中一共展示了LockManager::isLocked方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ASSERT
TEST(LockManagerTest, SingleTx) {
LockManager lm;
Transaction t1(1);
ResourceId r1 = 1;
LockManager::LockStatus status;
// acquire a shared record lock
ASSERT(! lm.isLocked(&t1, kShared, r1));
lm.acquire(&t1, kShared, r1);
ASSERT(lm.isLocked(&t1, kShared, r1));
// release a shared record lock
lm.release(&t1, kShared, r1);
ASSERT(! lm.isLocked(&t1, kShared, r1));
// acquire a shared record lock twice, on same ResourceId
lm.acquire(&t1, kShared, r1);
lm.acquire(&t1, kShared, r1);
ASSERT(lm.isLocked(&t1, kShared, r1));
// release the twice-acquired lock, once. Still locked
status = lm.release(&t1, kShared, r1);
ASSERT(LockManager::kLockCountDecremented == status);
ASSERT(lm.isLocked(&t1, kShared, r1));
// after 2nd release, it's not locked
status = lm.release(&t1, kShared, r1);
ASSERT(LockManager::kLockReleased == status);
ASSERT(!lm.isLocked(&t1, kShared, r1));
// --- test downgrade and release ---
// acquire an exclusive then a shared lock, on the same ResourceId
lm.acquire(&t1, kExclusive, r1);
ASSERT(lm.isLocked(&t1, kExclusive, r1));
lm.acquire(&t1, kShared, r1);
ASSERT(lm.isLocked(&t1, kExclusive, r1));
ASSERT(lm.isLocked(&t1, kShared, r1));
// release shared first, then exclusive
lm.release(&t1, kShared, r1);
ASSERT(! lm.isLocked(&t1, kShared, r1));
ASSERT(lm.isLocked(&t1, kExclusive, r1));
lm.release(&t1, kExclusive, r1);
ASSERT(! lm.isLocked(&t1, kExclusive, r1));
// release exclusive first, then shared
lm.acquire(&t1, kExclusive, r1);
lm.acquire(&t1, kShared, r1);
lm.release(&t1, kExclusive, r1);
ASSERT(! lm.isLocked(&t1, kExclusive, r1));
ASSERT(lm.isLocked(&t1, kShared, r1));
lm.release(&t1, kShared, r1);
ASSERT(! lm.isLocked(&t1, kShared, r1));
// --- test upgrade and release ---
// acquire a shared, then an exclusive lock on the same ResourceId
lm.acquire(&t1, kShared, r1);
ASSERT(lm.isLocked(&t1, kShared, r1));
lm.acquire(&t1, kExclusive, r1);
ASSERT(lm.isLocked(&t1, kShared, r1));
ASSERT(lm.isLocked(&t1, kExclusive, r1));
// release exclusive first, then shared
lm.release(&t1, kExclusive, r1);
ASSERT(! lm.isLocked(&t1, kExclusive, r1));
ASSERT(lm.isLocked(&t1, kShared, r1));
lm.release(&t1, kShared, r1);
ASSERT(! lm.isLocked(&t1, kShared, r1));
// release shared first, then exclusive
lm.acquire(&t1, kShared, r1);
lm.acquire(&t1, kExclusive, r1);
lm.release(&t1, kShared, r1);
ASSERT(! lm.isLocked(&t1, kShared, r1));
ASSERT(lm.isLocked(&t1, kExclusive, r1));
lm.release(&t1, kExclusive, r1);
ASSERT(! lm.isLocked(&t1, kExclusive, r1));
}