CAS,当oldVal与expected相同时,将oldVal更新为newVal,原子操作ABA problem:when a location is read
twice, has the same value for both reads, and "value is same“ is used...
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其他好文 时间:
2014-05-26 16:06:53
阅读次数:
217
不能再简化了#include#include#includeint
meng_read_proc(char*page,char**start,off_t offset,int count,int*eof,void*data){
char*s="Hello. This is meng p...
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系统相关 时间:
2014-05-26 15:52:49
阅读次数:
463
\n"; while($file = $mydir->read()) {
if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!="..")) { echo
"$fi...
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Web程序 时间:
2014-05-26 14:22:05
阅读次数:
239
Features 256 bits EEPROM memory organized in 8
pages of 32 bits each 32 bits unique factory programmed serial number Typical
operating frequency : ...
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其他好文 时间:
2014-05-26 13:32:43
阅读次数:
287
IOzone是一个文件系统测试基准工具。可以测试不同的操作系统中文件系统的读写性能。可以通过
write, re-write, read, re-read, random read, random write, random mix, backwards
read, record rewirte, ...
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其他好文 时间:
2014-05-26 13:15:14
阅读次数:
298
Balancing CPU and I/O throughput is essential
to achieve good overall performance and to maximize hardware utilization. SQL
Server includes two asynch...
分类:
数据库 时间:
2014-05-26 12:20:40
阅读次数:
386
Help Me with the GameTime Limit: 1000MSMemory
Limit: 65536KTotal Submissions: 3175Accepted: 2053DescriptionYour task is to
read a picture of a chessbo...
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其他好文 时间:
2014-05-26 10:28:59
阅读次数:
618
Direct request is the simplest method used to request a semaphore. The request behaves as an atomic read and set operation. The result of a request is either to grant the semaphore
to the requesting...
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其他好文 时间:
2014-05-22 17:21:38
阅读次数:
517
--查询数据库状态select name,user_access,user_access_desc,
snapshot_isolation_state,snapshot_isolation_state_desc,
is_read_committed_snapshot_onfrom sys.dat.....
分类:
数据库 时间:
2014-05-22 16:48:03
阅读次数:
340
shell命令分成内置命令和外部命令。
内置命令(builtin command) 是shell解释程序内建的,有shell直接执行,不需要派生新的进程。有一些内部命令可以用来改变当前的shell环境。
常见的内部命令有:.(点命令)、bg、cd、continue、echo、exec、exit、export、fg、jobs、pwd、read、return、set、shift、t...
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其他好文 时间:
2014-05-21 13:33:24
阅读次数:
213