525
Bug:StampedLock鐨勪腑鏂棶棰樺鑷碈PU鐖嗘弧-鍗氬-浜戞爾紺懼尯-闃塊噷浜?
StampedLock浣滀負JAVA8涓嚭鐜扮殑鏂板瀷閿侊紝寰堝彲鑳藉湪澶у鏁板満鏅兘鍙互鏇誇唬ReentrantReadWriteLock銆傚畠瀵逛簬璿?鍐欓兘鎻愪緵浜嗗洓涓帴鍙?鎹㈡垚write涓哄啓閿?锛?/p>
- readLock()
- tryReadLock()
- tryReadLock(long time, TimeUnit unit)
- readLockInterruptibly()
榪欏嚑涓柟娉曞搴旂殑璿箟涓猴細
- 鑾峰彇璿婚攣锛堥樆濉烇紝涓嶅搷搴斾腑鏂級
- 鑾峰彇璿婚攣锛堢珛鍗籌級
- 闄愭椂鑾峰彇璿婚攣锛堝搷搴斾腑鏂級
- 鑾峰彇璿婚攣锛堥樆濉烇紝鍝嶅簲涓柇锛?/li>
鐒惰€屽湪readLock鏂規硶锛堝嵆涓嶅搷搴斾腑鏂級涓瓨鍦ㄩ棶棰?write鐨勭増鏈篃鏄?锛岃瀵烠PU浣跨敤鐜囷紝鎵ц浠ヤ笅浠ｇ爜锛?/div>
01 |
public聽class聽TestStampedLock {
|
02 |
聽聽聽聽public聽static聽void聽main(String[] args)聽throws聽InterruptedException{
|
03 |
聽聽聽聽final聽StampedLock lock =聽new聽StampedLock();
|
04 |
聽聽聽聽new聽Thread(){
|
05 |
聽聽聽聽聽聽聽public聽void聽run(){
|
06 |
聽聽聽聽聽聽聽long聽readLong = lock.writeLock();
|
07 |
聽聽聽聽聽聽聽LockSupport.parkNanos(6100000000L);
|
08 |
聽聽聽聽聽聽聽lock.unlockWrite(readLong);
|
09 |
聽聽聽聽聽}
|
10 |
聽聽聽聽}.start();
|
11 |
聽聽聽聽Thread.sleep(100);
|
12 |
聽聽聽聽for(聽int聽i =聽0; i <聽3; ++i)
|
13 |
聽聽聽聽聽聽聽new聽Thread(new聽OccupiedCPUReadThread(lock)).start();
|
14 |
聽聽聽聽}
|
15 |
聽聽聽聽private聽static聽class聽OccupiedCPUReadThread聽implements聽Runnable{
|
16 |
聽聽聽聽聽聽聽聽private聽StampedLock lock;
|
17 |
聽聽聽聽聽聽聽聽public聽OccupiedCPUReadThread(StampedLock lock){
|
18 |
聽聽聽聽聽聽聽聽聽聽聽聽this.lock = lock;
|
19 |
聽聽聽聽聽聽聽聽}
|
20 |
聽聽聽聽聽聽聽聽public聽void聽run(){
|
21 |
聽聽聽聽聽聽聽聽聽聽聽聽Thread.currentThread().interrupt();
|
22 |
聽聽聽聽聽聽聽聽聽聽聽聽long聽lockr = lock.readLock();
|
23 |
聽聽聽聽聽聽聽聽聽聽聽聽System.out.println(Thread.currentThread().getName() +聽" get read lock");
|
24 |
聽聽聽聽聽聽聽聽聽聽聽聽lock.unlockRead(lockr);
|
25 |
聽聽聽聽聽聽聽聽}
|
26 |
聽聽聽聽}
|
27 |
} |
鍏堝紑鍚竴涓嚎紼嬭幏鍙栧啓閿佸苟淇濇寔6縐掞紝鍐嶅紑鍚笁涓甫鐫€涓柇鐘舵€佺殑綰跨▼鍘昏幏鍙栬閿侊紙readLock鏂規硶锛夛紝緇撴灉鏄?涓牳蹇冭鍗犳嵁浜嗚繎6縐掋€?/div>
鍘熷洜鍦ㄤ簬娌℃湁浣跨敤淇濆瓨/澶嶅師涓柇鐘舵€?/strong>鐨勬満鍒訛紝閫氳繃hack婧愮爜锛屾彃鍏ヤ繚瀛樹腑鏂拰榪斿洖鍓嶆仮澶嶄腑鏂殑鐩稿叧浠ｇ爜鍗衝彲淇锛?/div>
1 |
boolean聽interrupted聽=聽false;
|
1 |
if(interrupted)
|
2 |
聽聽聽聽Thread.currentThread().interrupt();
|
3 |
return聽ns;
|
1 |
if(Thread.interrupted()){
|
2 |
聽聽聽聽if(interruptible)
|
3 |
聽聽聽聽聽聽聽聽return聽cancelWaiter(node, p,聽true);
|
4 |
聽聽聽聽else
|
5 |
聽聽聽聽聽聽聽聽interrupted =聽true;
|
6 |
} |
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最後更新：2017-05-23 18:02:56