18 |
|
static boolean doBuiltin = true; |
19 |
|
static boolean doReadWrite = true; |
20 |
|
static boolean doSemaphore = true; |
21 |
+ |
static boolean doStampedLock = true; |
22 |
|
static boolean doFair = true; |
23 |
|
|
24 |
|
public static void main(String[] args) throws Exception { |
94 |
|
System.out.print("ReentrantReadWriteLock"); |
95 |
|
new ReentrantReadWriteLockLoop().test(v, nthreads, iters); |
96 |
|
Thread.sleep(10); |
96 |
– |
|
97 |
|
} |
98 |
|
|
99 |
|
if (doSemaphore) { |
106 |
|
System.out.print("FairSemaphore "); |
107 |
|
new FairSemaphoreLoop().test(v, nthreads, iters); |
108 |
|
Thread.sleep(10); |
109 |
– |
|
109 |
|
} |
110 |
|
|
111 |
|
if (doFair) { |
125 |
|
new FairReentrantReadWriteLockLoop().test(v, nthreads, iters); |
126 |
|
Thread.sleep(10); |
127 |
|
} |
129 |
– |
|
128 |
|
} |
129 |
|
|
130 |
+ |
if (doStampedLock) { |
131 |
+ |
if (print) |
132 |
+ |
System.out.print("StampedLockWrite "); |
133 |
+ |
new StampedLockWriteLoop().test(v, nthreads, iters); |
134 |
+ |
Thread.sleep(10); |
135 |
+ |
|
136 |
+ |
if (print) |
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 |
|
|
148 |
|
abstract static class LockLoop implements Runnable { |
344 |
|
return sum; |
345 |
|
} |
346 |
|
} |
347 |
+ |
|
348 |
|
private static class FairSemaphoreLoop extends LockLoop { |
349 |
|
private final Semaphore sem = new Semaphore(1, true); |
350 |
|
final int loop(int n) { |
390 |
|
} |
391 |
|
sum += LoopHelpers.compute2(v); |
392 |
|
} |
393 |
+ |
return sum; |
394 |
+ |
} |
395 |
+ |
} |
396 |
+ |
|
397 |
+ |
private static class StampedLockWriteLoop extends LockLoop { |
398 |
+ |
private final StampedLock lock = new StampedLock(); |
399 |
+ |
final int loop(int n) { |
400 |
+ |
int sum = 0; |
401 |
+ |
while (n-- > 0) { |
402 |
+ |
long stamp = lock.writeLock(); |
403 |
+ |
try { |
404 |
+ |
v = LoopHelpers.compute1(v); |
405 |
+ |
} |
406 |
+ |
finally { |
407 |
+ |
lock.unlockWrite(stamp); |
408 |
+ |
} |
409 |
+ |
sum += LoopHelpers.compute2(v); |
410 |
+ |
} |
411 |
+ |
return sum; |
412 |
+ |
} |
413 |
+ |
} |
414 |
+ |
|
415 |
+ |
private static class StampedLockReadLoop extends LockLoop { |
416 |
+ |
private final StampedLock lock = new StampedLock(); |
417 |
+ |
final int loop(int n) { |
418 |
+ |
int sum = 0; |
419 |
+ |
while (n-- > 0) { |
420 |
+ |
long stamp = lock.readLock(); |
421 |
+ |
try { |
422 |
+ |
v = LoopHelpers.compute1(v); |
423 |
+ |
} |
424 |
+ |
finally { |
425 |
+ |
lock.unlockRead(stamp); |
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 |
|
} |