linux 设备驱动之IOCTRL
1,where come from?
ioctrl(或者说unlocked_ioctl/compat_ioctl)是file_operations结构体的函数指针
struct file_operations {
...
long (*unlocked_ioctl) (struct file *, unsigned i...
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系统相关 时间:
2014-12-25 20:34:47
阅读次数:
452
传送门:cf 498C
给定一个长度为n的数组,已经m组下标对应关系(下标之和为奇数),现在可以对m组对应关系中的数同除一个大于1的整数,问最多能进行多少次这样的操作
要操作次数最大,每次处理的时候应该除质数。
下标之和为奇数,不难发现它构成了一张二分图。
枚举sqrt(10^9)的质数,找出n个数中各有多少个这样的质数k,然后建立对应的图,跑网络流最大流即可。
/*******...
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其他好文 时间:
2014-12-25 10:04:51
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200
1、Query Operations(查询操作) int size();boolean isEmpty(); boolean containsKey(Object key);boolean containsValue(Object value);boolean containsValue(Objec...
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其他好文 时间:
2014-12-24 11:30:42
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136
题目:
Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set.
get(key) - Get the value (will always be positive) of th...
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其他好文 时间:
2014-12-23 00:22:19
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227
微软近期Open的职位:Job posting title: Senior Software EngineerLocation: China, BeijingDivision: Operations System Group Engineering   Group OverviewOSG i...
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其他好文 时间:
2014-12-23 00:04:12
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231
A redo log file is corrupted while the database is open; as a con
sequence, database operations are stopped because archiving cannot co
ntinue. What would you do to solve the problem?
A. clear th...
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数据库 时间:
2014-12-21 19:30:02
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239
数据库系统性能、负载和容量Cursor IsolationBecause the cursor is not isolated during its lifetime, intervening write operations on a document may result in a cursor...
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数据库 时间:
2014-12-20 20:52:59
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268
Abstract. When you finish modeling objects in the scene, you must want to use some operations to view the scene objects, such as Pan, Zoom and Rotate ...
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其他好文 时间:
2014-12-20 20:48:58
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377
Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:getandset.get(key)- Get the valu...
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系统相关 时间:
2014-12-20 15:32:13
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217
原文:http://msdn.microsoft.com/zh-cn/data/dn469464Logging and Intercepting Database OperationsStarting with Entity Framework 6, anytime Entity Framework...
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数据库 时间:
2014-12-17 16:06:16
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220