40 lines
1.0 KiB
Java
40 lines
1.0 KiB
Java
//: concurrency/MultiLock.java
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// ©2015 MindView LLC: see Copyright.txt
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// One thread can reacquire the same lock.
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import static com.mindviewinc.util.Print.*;
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public class MultiLock {
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public synchronized void f1(int count) {
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if(count-- > 0) {
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print("f1() calling f2() with count " + count);
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f2(count);
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}
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}
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public synchronized void f2(int count) {
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if(count-- > 0) {
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print("f2() calling f1() with count " + count);
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f1(count);
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}
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}
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public static void main(String[] args) throws Exception {
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final MultiLock multiLock = new MultiLock();
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new Thread() {
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@Override
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public void run() {
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multiLock.f1(10);
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}
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}.start();
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}
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} /* Output:
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f1() calling f2() with count 9
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f2() calling f1() with count 8
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f1() calling f2() with count 7
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f2() calling f1() with count 6
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f1() calling f2() with count 5
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f2() calling f1() with count 4
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f1() calling f2() with count 3
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f2() calling f1() with count 2
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f1() calling f2() with count 1
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f2() calling f1() with count 0
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*///:~
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