1. 死锁
在多个mutex存在的时候,可能就会产生死锁。
避免死锁的一个最通用的方法是,总是按照相同的顺序来lock the two mutexes, 即总是先于mutex B之前lock mutex A,这样就不会有死锁的可能。有时,这种方法很简单实用,当这些mutexes用于不同的目标。但是,当mutexes用于包含相同类的一个实例时,就不是那么容易了。
例如,如下面程序所...
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编程语言 时间:
2014-08-09 18:47:19
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303
A + B Problem II
Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d
& %I64u
Description
I have a very simple problem for you. Given two integers A and B, your job ...
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其他好文 时间:
2014-08-09 15:55:08
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284
One day Dima and Alex had an argument about the price and quality of laptops. Dima thinks that the more expensive a laptop is, the better it is. Alex disagrees. Alex thinks that there are two laptops,...
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其他好文 时间:
2014-08-09 11:47:17
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276
Sumdiv
Time Limit: 1000MS
Memory Limit: 30000K
Total Submissions: 13959
Accepted: 3433
Description
Consider two natural numbers A and B. Let S be the sum of all natur...
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其他好文 时间:
2014-08-09 11:43:07
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226
Here I share with you a demo for python map, reduce and filter functional programming that
owned by me(Xiaoqiang).
I assume there are two DB tables, that `file_logs` and `expanded_attrs` which re...
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编程语言 时间:
2014-08-09 04:57:17
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525
First, we have to render two versions of our video: an SD (standard definition) and HD (high definition) one. Since the newer iPads, iPhones and And.....
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其他好文 时间:
2014-08-09 02:24:08
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476
Problem Description:
Two elements of a binary search tree (BST) are swapped by mistake.
Recover the tree without changing its structure.
Note:
A solution using O(n)
space is pretty straigh...
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其他好文 时间:
2014-08-08 21:22:36
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315
Divide Two IntegersDivide two integers without using multiplication, division and mod operator.不用* 、/、%来做除法。只能加减了啊亲!算法思路:一个一个加上去必超时,例如dividend = Integ...
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其他好文 时间:
2014-08-08 20:59:36
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186
from:http://archives.opennebula.org/documentation:archives:rel2.2:congThere are two contextualization mechanisms available in OpenNebula: the automati...
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其他好文 时间:
2014-08-08 17:54:46
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293
Here are two simple questions. Problem A #include include using namespace std; class vehicle { public: vehicle(const string& name); virt...
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其他好文 时间:
2014-08-08 17:48:16
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264