重入锁

crossoverJie · crossoverJie · commit 24b13d745683 · 2018-01-25T17:34:54.000+08:00
diff --git a/MD/ReentrantLock.md b/MD/ReentrantLock.md
@@ -267,19 +267,19 @@ ReentrantLock 分为**公平锁**和**非公平锁**，可以通过构造方法
         return false;
     }
     
-    	  //尝试释放锁
-        protected final boolean tryRelease(int releases) {
-            int c = getState() - releases;
-            if (Thread.currentThread() != getExclusiveOwnerThread())
-                throw new IllegalMonitorStateException();
-            boolean free = false;
-            if (c == 0) {
-                free = true;
-                setExclusiveOwnerThread(null);
-            }
-            setState(c);
-            return free;
-        }        
+    //尝试释放锁
+    protected final boolean tryRelease(int releases) {
+        int c = getState() - releases;
+        if (Thread.currentThread() != getExclusiveOwnerThread())
+            throw new IllegalMonitorStateException();
+        boolean free = false;
+        if (c == 0) {
+            free = true;
+            setExclusiveOwnerThread(null);
+        }
+        setState(c);
+        return free;
+    }        
 ```
 
 首先会判断当前线程是否为获得锁的线程，由于是重入锁所以需要将 `state` 减到 0 才认为完全释放锁。
