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C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
...ount *Ref() {
++cnt_;
return this;
}
void Deref() {
if (--cnt_ == 0) {
delete this;
}
}
private:
std::unique_ptr<T> ptr_;
std::atomic_uint32_t cnt_;
};
仔细观察可以发现：
每一次的读取操作对应引用计数中增加的数值 1；
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What's the difference between VARCHAR and CHAR?
What's the difference between VARCHAR and CHAR in MySQL?
14 Answers
14
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socket.error: [Errno 48] Address already in use
...
You already have a process bound to the default port (8000). If you already ran the same module before, it is most likely that process still bound to the port. Try and locate the other process first:
$ ps -fA | grep python
501 81651 12648 0 9:53PM ttys000 0:00.16 python -m Sim...
How to perform Callbacks in Objective-C
...ss" and MyClass calls the delegate methods on the delegate as appropriate. If your delegate callbacks are optional, you'll typically guard them at the dispatch site with something like "if ([delegate respondsToSelector:@selector(myClassWillDoSomething:)) {". In my example, the delegate is required t...
When should a class be Comparable and/or Comparator?
...s instances.
Comparator
A comparator object is capable of comparing two different objects. The class is not comparing its instances, but some other class’s instances. This comparator class must implement the java.util.Comparator interface.
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How to center align the cells of a UICollectionView?
...ine. The first 0, is the top edge argument, you could adjust that one too, if you want to center the content vertically in the screen.
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How to check for changes on remote (origin) Git repository?
...he remote branch in your repository to point to the latest version. For a diff against the remote:
git diff origin/master
Yes, you can use caret notation as well.
If you want to accept the remote changes:
git merge origin/master
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How to remove the default link color of the html hyperlink 'a' tag?
... color:#00A0C6;
text-decoration:none;
cursor:pointer;
}
if text-decoration doesn't work then include
text-decoration: none !important;
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How to remove the querystring and get only the url?
...nstead of rebuilding the url only to parse it again. would give another +1 if possible, for concision.
– ericsoco
Sep 30 '12 at 19:48
8
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How to get .pem file from .key and .crt files?
How can I create a PEM file from an SSL certificate?
10 Answers
10
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