如下如果注释synchronized (obj)会报java.lang.IllegalMonitorStateException: current thread is not owner 正常使用必须在synchronized中使用! public static void main(String[] args) { Object obj = new Object(); new Thread(() -> { // synchronized (obj) { System.out.println(Thread.currentThread().ge...
System.out.println("[Put] Current thread "+ Thread.currentThread().getName() +" is waiting"); notNull.await(); } queue.add("1"); System.out.println("[Put] Current thread "+ Thread.currentThread().getName() +" add 1 item, current count: "+ queue.size()); notEmpty.signal(); ...
final Thread current = Thread.currentThread();//获取当前线程实例 int c = getState();//获取state变量的值,即当前锁被重入的次数 if (c == 0) { //state为0,说明当前锁未被任何线程持有 if (compareAndSetState(0, acquires)) { //以cas方式获取锁 setExclusiveOwnerThread(current); //将当前线程...
// we don't need to do so to check if current thread is owner return getExclusiveOwnerThread() == Thread.currentThread(); } 5.6.2、 doSignal(Node) - 唤醒first节点 private void doSignal(Node first) { do { // 将 next 节点设置成 null if ( (firstWaiter = first.nextWaiter) == null...
System.out.println(Thread.currentThread().getName() +"此时队列空了线程进入等待状态");// 队列空了线程进入等待状态fullCondition.await(); } obj = buffer.poll();//通知notFullCondition.signal(); }finally{ lock.unlock(); }returnobj; }publicstaticvoidmain(String[] args){// 初始化最大能放2个...
{thrownewUnsupportedOperationException();}/***持有锁的线程是否是当前线程** @return*/protectedfinalbooleanisHeldExclusively(){// While we must in general read state before owner,// we don't need to do so to check if current thread is ownerreturngetExclusiveOwnerThread()==Thread.currentThread()...
We're starting our journey from SCOM to Azure Monitor and have run into an issue with Azure Alerts (sorry for posting this in Azure Log Analytics, but there...
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{boolret =false;//Mutex::Autolock _lock(mCmdQueMtx);//MY_LOGD_IF(ENABLE_LOG_PER_FRAME,"+ que size(%d)", mCmdQue.size());/// Wait until the queue is not empty or this thread will exit.while( mCmdQue.empty() && ! exitPending() ) {...
sync queue是等待锁的队列,当一个线程被包装成Node加到该队列中时,必然是没有获取到锁;当处于该队列中的节点获取到了锁,它将从该队列中移除(事实上移除操作是将获取到锁的节点设为新的dummy head,并将thread属性置为null)。 condition队列是等待在特定条件下的队列,因为调用await方法时,必然是已经获得了lock锁,...