137 |
|
System.out.print("StampedLockRead "); |
138 |
|
new StampedLockReadLoop().test(v, nthreads, iters); |
139 |
|
Thread.sleep(10); |
140 |
+ |
|
141 |
+ |
if (print) |
142 |
+ |
System.out.print("StampedLockReadWrite"); |
143 |
+ |
new StampedLockReadLoop().test(v, nthreads, iters); |
144 |
+ |
Thread.sleep(10); |
145 |
|
} |
146 |
|
} |
147 |
|
|
426 |
|
} |
427 |
|
sum += LoopHelpers.compute2(v); |
428 |
|
} |
429 |
+ |
return sum; |
430 |
+ |
} |
431 |
+ |
} |
432 |
+ |
|
433 |
+ |
private static class StampedLockReadWriteLoop extends LockLoop { |
434 |
+ |
private final StampedLock lock = new StampedLock(); |
435 |
+ |
final int loop(int n) { |
436 |
+ |
int sum = 0; |
437 |
+ |
while (n-- > 0) { |
438 |
+ |
int x; |
439 |
+ |
long stamp = lock.readLock(); |
440 |
+ |
try { |
441 |
+ |
x = LoopHelpers.compute1(v); |
442 |
+ |
} |
443 |
+ |
finally { |
444 |
+ |
lock.unlockRead(stamp); |
445 |
+ |
} |
446 |
+ |
stamp = lock.writeLock(); |
447 |
+ |
try { |
448 |
+ |
v = x; |
449 |
+ |
} finally { |
450 |
+ |
lock.unlockWrite(stamp); |
451 |
+ |
} |
452 |
+ |
sum += LoopHelpers.compute2(v); |
453 |
+ |
} |
454 |
|
return sum; |
455 |
|
} |
456 |
|
} |