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root/jsr166/jsr166/src/test/tck/SystemTest.java

Comparing jsr166/src/test/tck/SystemTest.java (file contents):
Revision 1.7 by jsr166, Mon Nov 2 20:28:32 2009 UTC vs.
Revision 1.11 by jsr166, Tue Mar 15 19:47:07 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
#	Line 19 | Line 19 | public class SystemTest extends JSR166Te
19
20		/**
21		* Worst case rounding for millisecs; set for 60 cycle millis clock.
22	<	* This value might need to be changed os JVMs with coarser
23	<	*  System.currentTimeMillis clocks.
22	>	* This value might need to be changed on JVMs with coarser
23	>	* System.currentTimeMillis clocks.
24		*/
25		static final long MILLIS_ROUND = 17;
26
#	Line 29 | Line 29 | public class SystemTest extends JSR166Te
29		* possible rounding).
30		* This shows only that nano timing not (much) worse than milli.
31		*/
32	<	public void testNanoTime1() {
33	<	try {
34	<	long m1 = System.currentTimeMillis();
35	<	Thread.sleep(1);
36	<	long n1 = System.nanoTime();
37	<	Thread.sleep(SHORT_DELAY_MS);
38	<	long n2 = System.nanoTime();
39	<	Thread.sleep(1);
40	<	long m2 = System.currentTimeMillis();
41	<	long millis = m2 - m1;
42	<	long nanos = n2 - n1;
43	<	assertTrue(nanos >= 0);
44	<	long nanosAsMillis = nanos / 1000000;
45	<	assertTrue(nanosAsMillis <= millis + MILLIS_ROUND);
46	<	}
47	<	catch(InterruptedException ie) {
48	<	unexpectedException();
49	<	}
32	>	public void testNanoTime1() throws InterruptedException {
33	>	long m1 = System.currentTimeMillis();
34	>	Thread.sleep(1);
35	>	long n1 = System.nanoTime();
36	>	Thread.sleep(SHORT_DELAY_MS);
37	>	long n2 = System.nanoTime();
38	>	Thread.sleep(1);
39	>	long m2 = System.currentTimeMillis();
40	>	long millis = m2 - m1;
41	>	long nanos = n2 - n1;
42	>	assertTrue(nanos >= 0);
43	>	long nanosAsMillis = nanos / 1000000;
44	>	assertTrue(nanosAsMillis <= millis + MILLIS_ROUND);
45		}
46
47		/**
#	Line 54 | Line 49 | public class SystemTest extends JSR166Te
49		* for rounding.
50		* This shows only that nano timing not (much) worse than milli.
51		*/
52	<	public void testNanoTime2() {
53	<	try {
54	<	long n1 = System.nanoTime();
55	<	Thread.sleep(1);
56	<	long m1 = System.currentTimeMillis();
57	<	Thread.sleep(SHORT_DELAY_MS);
58	<	long m2 = System.currentTimeMillis();
59	<	Thread.sleep(1);
60	<	long n2 = System.nanoTime();
61	<	long millis = m2 - m1;
62	<	long nanos = n2 - n1;
63	<
64	<	assertTrue(nanos >= 0);
65	<	long nanosAsMillis = nanos / 1000000;
71	<	assertTrue(millis <= nanosAsMillis + MILLIS_ROUND);
72	<	}
73	<	catch(InterruptedException ie) {
74	<	unexpectedException();
75	<	}
52	>	public void testNanoTime2() throws InterruptedException {
53	>	long n1 = System.nanoTime();
54	>	Thread.sleep(1);
55	>	long m1 = System.currentTimeMillis();
56	>	Thread.sleep(SHORT_DELAY_MS);
57	>	long m2 = System.currentTimeMillis();
58	>	Thread.sleep(1);
59	>	long n2 = System.nanoTime();
60	>	long millis = m2 - m1;
61	>	long nanos = n2 - n1;
62	>
63	>	assertTrue(nanos >= 0);
64	>	long nanosAsMillis = nanos / 1000000;
65	>	assertTrue(millis <= nanosAsMillis + MILLIS_ROUND);
66		}
67
68		}

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