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多线程并发常用类:condition,semaphore,CyclicBarrier,countdownlatch,exchanger使用整理
condition 类: 作为一个示例,假定有一个绑定的缓冲区,它支持 put 和 take 方法。如果试图在空的缓冲区上执行 take 操作,则在某一个项变得可用之前,线程将一直阻塞;如果试图在满的缓冲区上执行 put 操作,则在有空间变得可用之前,线程将一直阻塞。我们喜欢在单独的等待 set 中保存 put 线程和 take 线程,这样就可以在缓冲区中的项或空间变得可用时利用最佳规划...
分类:编程语言   时间:2015-01-27 09:25:18    阅读次数:149
warning: integer overflow in expression (take this as a lesson)
#define QUOTA (5*1024*1024*1024) uint64_t ui64 = QUOTA; gcc编译器会报出:warning: integer overflow in expression,你发现哪里出问题了?以此为戒!...
分类:其他好文   时间:2015-01-26 11:58:28    阅读次数:309
hdu 1160 FatMouse's Speed(最长不下降子序列+输出路径)
题意:FatMouse believes that the fatter a mouse is, the faster it runs. To disprove this, you want to take the data on a collection of mice and put as la...
分类:其他好文   时间:2015-01-25 11:01:17    阅读次数:157
重置MYSQL的root账号的密码
方法一:在my.ini的[mysqld]字段加入:skip-grant-tables重启mysql服务,这时的mysql不需要密码即可登录数据库然后进入mysqlmysql>usemysql;mysql>更新usersetpassword=password(‘新密码‘)WHEREUser=‘root‘;mysql>flushprivileges;运行之后最后去掉my.ini中的skip-gran..
分类:数据库   时间:2015-01-25 06:36:14    阅读次数:267
UVa 10192 Vacation (最长公共子序列)
VacationTime Limit: 3000MSMemory Limit: Unknown64bit IO Format: %lld & %lluDescriptionThe ProblemYou are planning to take some rest and to go out on v...
分类:其他好文   时间:2015-01-24 10:03:11    阅读次数:235
Quantum ESPRESSO tutorial: Car-Parrinello Molecular Dynamics
These examples illustrate the applications ofcp.xMD code in the Quantum ESPRESSO distribution. Since MD simulations usually take very long, we will lo...
分类:其他好文   时间:2015-01-23 21:24:40    阅读次数:357
关键路径算法(PAT How Long Does It Take (25))
#include #include #include #include #include using namespace std ; #define MAXN 100 int map[MAXN][MAXN] ; int in_cout[MAXN] ; int e_time[MAXN] ; int arry[MAXN] ; int n , e , n_s = 1 ,sum ; int max(...
分类:编程语言   时间:2015-01-22 18:12:04    阅读次数:295
POJ 3617 Best Cow Line (贪心)
Best Cow Line Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11230   Accepted: 3329 Description FJ is about to take his N (1 ≤ N ≤ 2,000) cows to the an...
分类:其他好文   时间:2015-01-22 13:24:57    阅读次数:157
spark sortByKey subtractByKey take takeOrdered等函数使用例子
package com.latrobe.spark import org.apache.spark.{SparkContext, SparkConf} /** * Created by spark on 15-1-19. * 根据key对K-V类型的RDD进行排序获得新的RDD */ object SortByKey { def main(args: Array[String]) {...
分类:其他好文   时间:2015-01-20 23:59:25    阅读次数:500
开启mysql远程访问
一、登陆mysql以后执行以下命令: GRANT ALL ON *.* TO username@'%' IDENTIFIED BY 'password' WITH GRANT OPTION; FLUSH PRIVILEGES; 二、修改/etc/mysql/my.cnf,注释以下行: skip-ne...
分类:数据库   时间:2015-01-20 15:19:57    阅读次数:154
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