| Queries if this lock is held by the current thread.
Analogous to the
Thread.holdsLock method for built-in
monitor locks, this method is typically used for debugging and
testing. For example, a method that should only be called while
a lock is held can assert that this is the case:
class X {
ReentrantLock lock = new ReentrantLock();
// ...
public void m() {
assert lock.isHeldByCurrentThread();
// ... method body
}
}
It can also be used to ensure that a reentrant lock is used
in a non-reentrant manner, for example:
class X {
ReentrantLock lock = new ReentrantLock();
// ...
public void m() {
assert !lock.isHeldByCurrentThread();
lock.lock();
try {
// ... method body
} finally {
lock.unlock();
}
}
}
true if current thread holds this lock and false otherwise. | 