За блокировкой всегда следует блок try / finally, почему?
ReentrantReadWriteLock readWriteLockBitmap = new ReentrantReadWriteLock();
Lock read = readWriteLockBitmap.readLock();
Lock write = readWriteLockBitmap.writeLock();
int shared = 0;
public void function1(){
read.lock();
try{
//reading shared int
}
finally{
read.unlock();
}
}
public void function 2(){
write.lock();
try{
//modify shared int
}
finally{
write.unlock();
}
}
Почему нужно использовать этот блок try / finally, а не просто писать код следующим образом:
ReentrantReadWriteLock readWriteLockBitmap = new ReentrantReadWriteLock();
Lock read = readWriteLockBitmap.readLock();
Lock write = readWriteLockBitmap.writeLock();
int shared = 0;
public void function1(){
read.lock();
//reading shared int
read.unlock();
}
public void function 2(){
write.lock();
//modify shared int
write.unlock();
}