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C++ SpinLock 自旋锁的代码实现（全网最简略的方式） - C/C++ - 清泛网 - ...
...TOMIC_FLAG_INIT) {}
virtual ~SpinLock() {}
void lock() { while(f_.test_and_set(memory_order_acquire)); }
void unlock() { f_.clear(memory_order_release); }
};
2、有退避策略的自旋锁，尝试一定次数(65535)失败后让出线程调度权：
class SpinLockWithYield {
atomic_f...
Virtual Memory Usage from Java under Linux, too much memory used
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This has been a long-standing complaint with Java, but it's largely meaningless, and usually based on looking at the wrong information. The usual phrasing is something like "Hello World on Java takes 10 megabytes! Why does it need that?" Well, here...
python generator “send” function purpose?
... function associated with Python generator function exists? I fully understand the yield function. However, the send function is confusing to me. The documentation on this method is convoluted:
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How to find the width of a div using vanilla JavaScript?
... answered Jan 24 '11 at 21:48
Andy EAndy E
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What is the best way to give a C# auto-property an initial value?
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In C# 5 and earlier, to give auto implemented properties an initial value, you have to do it in a constructor.
Since C# 6.0, you can specify initial value in-line. The syntax is:
public int X { get; set; } = x; // C# 6 or higher
...
how to create a file name with the current date & time in python?
... problem (answers your question) of getting a string with the current time and date format you specify:
import time
timestr = time.strftime("%Y%m%d-%H%M%S")
print timestr
yields:
20120515-155045
so your filename could append or use this string.
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How do I remove duplicate items from an array in Perl?
..., but if you were to add sorting in this function then it would trump $::a and $::b, wouldn't it?
– vol7ron
Feb 21 '12 at 16:45
5
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How to set ViewBag properties for all Views without using a base class for Controllers?
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Un-tried by me, but you might look at registering your views and then setting the view data during the activation process.
Because views are registered on-the-fly, the registration syntax doesn't help you with connecting to the Activated event, so you'd need to set it up in a Module:
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Reading Xml with XmlReader in C#
I'm trying to read the following Xml document as fast as I can and let additional classes manage the reading of each sub block.
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How do I execute inserts and updates in an Alembic upgrade script?
...ms.
Note that Alembic provides some basic data functions: op.bulk_insert() and op.execute(). If the operations are fairly minimal, use those. If the migration requires relationships or other complex interactions, I prefer to use the full power of models and sessions as described below.
The followi...