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原子访问
线程同步一大部分与原子访问(atomic access)有关, 所谓原子访问, 指的是一个线程在访问某个资源的同时能够保证没有其他线程会在同一时刻访问同一资源.假设编译器将g_x递增的那行代码时,生成了下面的汇编代码:MOV EAX, [g_x] ; Move the value in g_x i....
分类:其他好文   时间:2014-08-20 16:15:12    阅读次数:164
【Leetcode】Search in Rotated Sorted Array II
Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed?Would this affect the run-time complexity? How and why?Write a function ...
分类:其他好文   时间:2014-08-20 13:47:32    阅读次数:224
POJ 3187 Backward Digit Sums(next_permutation)
Description FJ and his cows enjoy playing a mental game. They write down the numbers from 1 to N (1 <= N <= 10) in a certain order and then sum adjacent numbers to produce a new list with one fewer...
分类:其他好文   时间:2014-08-20 10:33:36    阅读次数:256
CC150 - 11.2
Question:Write a method to sort an array of strings so that all the anagrams are next to each other. 1 package POJ; 2 3 import java.util.Arrays; 4 im....
分类:其他好文   时间:2014-08-20 02:41:34    阅读次数:199
CC150 - 11.1
Question:You are given two sorted arrays, A and B, where A has a large enough buffer at the end to hold B.Write a method to merge B into A in sorted o...
分类:其他好文   时间:2014-08-19 23:51:25    阅读次数:309
mmap。
linux mmap 内存映射mmap() vs read()/write()/lseek()通过strace统计系统调用的时候,常常能够看到mmap()与mmap2()。系统调用mmap()能够将某文件映射至内存(进程空间),如此能够把对文件的操作转为对内存的操作,以此避免很多其它的lseek()...
分类:其他好文   时间:2014-08-19 22:21:55    阅读次数:339
OpenWrt 开发版本主trunk MT7620N 无线驱动bug
环境: OpenWrt Development Trunk:  svn co svn://svn.openwrt.org/openwrt/trunk/ BUG: 1. 无线无法建立连接. 2. 无线建立连接获取IP地址失败,断开连接. 出现问题的时候会伴随以下dmesg [ 3702.380000] ieee80211 phy0: rt2x00queue_write_tx...
分类:其他好文   时间:2014-08-19 20:57:55    阅读次数:678
POJ 3304 计算几何
Segments Time Limit: 1000MS  Memory Limit: 65536K Total Submissions: 9564  Accepted: 2943 Description Given n segments in the two dimensional space, write a program, which determines if ther...
分类:其他好文   时间:2014-08-19 19:12:15    阅读次数:249
zencart只有购买过此产品的客户才能评价产品
当前登录的客户买过此产品时,才显示评价按钮:Execute($rev_query);if ($rev->fields['count']>0){?>' . zen_image_button(BUTTON_IMAGE_WRITE_REVIEW, BUTTON_WRITE_REVIEW_ALT) . ''...
分类:其他好文   时间:2014-08-19 18:39:25    阅读次数:198
20140819 例子
//求5!+ 4!+3! +2! +1!long A = 0; for (int i = 1; i 0) { z *= j; j--; } A += z; } Console.Write("结果:" + A + System.Environment.NewLine);//求100以内的素数...
分类:其他好文   时间:2014-08-19 18:05:45    阅读次数:152
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