uCOS_ii在进行Task Switch时,会选择当前Ready队列里优先级最高的Task来运行。那么uCOS_ii是如何找到优先级最高的Task的呢?
首先从以下代码片段入手进行分析,
#define OS_LOWEST_PRIO 63u /* Defines the lowest priority that can be assigned ......
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其他好文 时间:
2014-12-10 18:13:23
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200
Reference:http://blog.csdn.net/v_july_v/article/details/18312089 http://leetcode.com/2011/07/lowest-common-ancestor-of-a-binary-tree-part-ii.html(1) ....
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其他好文 时间:
2014-12-04 08:48:25
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一、任务就绪表的结构每个任务被赋予不同的优先等级,从0级到最低优先级OS_LOWEST_PRIO,包括0和OS_LOWEST_PRIO在内。当uC/OS-II初始化时,最低优先级OS_LOWEST_PRIO总是被赋给空闲任务idle task。注意:最多任务数目OS_MAX_TASKS和最低优先级数...
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其他好文 时间:
2014-12-01 22:06:25
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215
Lowest Common Multiple PlusTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 34980Accepted Submissio...
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其他好文 时间:
2014-11-21 06:54:49
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问题描述:
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.
If such arrangement is not possible, it must rearrange it as the lowest p...
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其他好文 时间:
2014-11-17 22:52:44
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229
Lowest Bit
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 8166 Accepted Submission(s): 5998
Problem Description
Given an posi...
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其他好文 时间:
2014-11-14 21:14:21
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170
Problem Description
In computer science, the longest increasing subsequence problem is to find a subsequence of a given sequence in which the subsequence's elements are in sorted order, lowest to hig...
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其他好文 时间:
2014-11-06 21:57:19
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题目大意:给你一个数A,求它的二进制表示中最右边的1表示的数
比如:26的二进制表示为11010,最右边的1表示的数为00010。
思路:位运算,其实就是求A & (A ^ (A-1) ),即A & (A-1)...
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其他好文 时间:
2014-10-29 21:36:02
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Recently Yaghoub is playing a new trick to sell some more. When somebody gives him A Tomans,
he who never has appropriate changes, asks for B Tomans such that lowest common multiple of A and B equal...
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其他好文 时间:
2014-10-29 21:35:13
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253
Problem Description求n个数的最小公倍数。Input输入包含多个测试实例,每个测试实例的开始是一个正整数n,然后是n个正整数。Output为每组测试数据输出它们的最小公倍数,每个测试实例的输出占一行。你可以假设最后的输出是一个32位的整数。Sample Input2 4 63 2 ...
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其他好文 时间:
2014-10-28 21:15:09
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273