Email: [email protected]
old blog: http://blog.csdn.net/luoyuyou
cur blog: https://segmentfault.com/blog/psly
latest blog: https://zhuanlan.zhihu.com/c_145672944
Here are some of the concurrent code I wrote
public final int getAndIncrement(int add) {
for (;;) {
int current = get();
int next = current + add;
if (compareAndSet(current, next))
return current;
}
}
WaitFreeGetAndIncrement.java： wait-free atomic counter based on cas (Compared to the one above's lock-free Atomic)
WaitFreeQueueFastPath.java： wait-free mpmc Queue；（Based on the classic's MSQueue, and Make a modification on http://www.cs.technion.ac.il/~erez/Papers/wf-methodology-ppopp12.pdf ）
LockFreeLinkedListWithRefCount.java： An tool for statistical reference counters, version 1 (Java implementation)，with main function to test
LockFreeLinkedListWithRefCount2.java： An tool for statistical reference counters, version 2 (Java implementation)，with main function to test
LinkedTransferQueueFix.java： This file has made a modification on LinkedTransferQueue in JDK as my patch, modifying the problem of losing the signal because of the node's cancellation。
StampedLock.java： This file adds the preservation / recovery interrupt mechanism to StampedLock in JDK. It corrects the problem of Excessive occupancy of cpu. If you want to test, please note that the LockSupport.nextSecondarySeed used here is the package control domain.
TestForStampedLock.java： It is used to test StampedLock:. When the first read lock enters the waiting queue and timeout, then the read thread after it links will re join in the queue, so that the order of the lock is reversed. (the LockSupport.nextSecondarySeed in the source code should be annotated).
ConcurrentLinkedQueue.java： This take a little modification on ConcurrentLinkedQueue.java in JUC with poll method and offer method (retains the original code in the annotation) , uses the same idea as LinkedTransferQueue.
UnsafeSupport.java： Provide available Unsafe。
TestForMultiverse.java： A use case that runs Multiverse (software transaction memory)。
LockFreeLinkedList.java： The famous Harris's List, lock-free List. paper: https://www.microsoft.com/en-us/research/wp-content/uploads/2001/10/2001-disc.pdf
scalableconqueue.h：with unlink thread handler when thread over(Precondition: thread must over before queue destruct) scalableconqueue_no_unlink.h：Don't unlink thread handler so no need for the order of thread over and queue over.