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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/testsuite/libjava.lang/TLtest.java | |
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Diffstat (limited to 'libjava/testsuite/libjava.lang/TLtest.java')
-rw-r--r-- | libjava/testsuite/libjava.lang/TLtest.java | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/libjava/testsuite/libjava.lang/TLtest.java b/libjava/testsuite/libjava.lang/TLtest.java new file mode 100644 index 000000000..6ddd0cbcd --- /dev/null +++ b/libjava/testsuite/libjava.lang/TLtest.java @@ -0,0 +1,60 @@ +class TLtest extends Thread { + + public static void main (String [] args) { + Data d = new Data (); + new ThreadTest (d, "A").start (); + new ThreadTest (d, "B").start (); + } +} + +class Data { + + private static ThreadLocal owner = new ThreadLocal () { + public Object initialValue () { return ("0"); } + }; + /* A thread will call `set' to set a value it wants an instance + of Data to associate with it and only it. */ + synchronized public void set (String v){owner.set (v);} + /* A thread will call `get' to get a value it wants an instance + of Data to associate with it and only it. */ + synchronized public String get (){return (String)owner.get();} +} + +class ThreadTest extends Thread { + + public Data d; + + ThreadTest (Data d, String name) { + super (name); + this.d = d; + } + + public void run () { + + int value = 0; + int ref = 0; + + for (int i = 0; i < 20; i++) { + + int rand = (int)(Math.random ()*20); + + /* Read `value', ref is kept for comparison */ + value = Integer.parseInt (d.get()); + + /* change `value' and ref by a random number, store `value'. */ + value += rand; ref += rand; + d.set (Integer.toString (value)); + + try { + sleep((int)((Math.random() * 20))); + } catch (InterruptedException e) {} + } + + /* If a thread didn't have private value to attach to the + instance of Data, results wouldn't be the same */ + if (ref == value) + System.out.println ("test OK."); + else + System.out.println ("test failed."); + } +} |