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【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...msg->msg_flags&MSG_MORE; //UDP_CORK或者MSG_MORE
int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
struct sk_buff *skb;
struct ip_options_data opt_copy;
if (len > 0xFFFF) //长度不能超过64k， UDP头部只有16位长度位
return -EMSGSIZE;
/*
* Check the flags.
...
IOCTL Linux device driver [closed]
...vr_version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", DRIVER_RELEASE);
}
static DEVICE_ATTR(version, S_IRUGO, mydrvr_version_show, NULL);
And during driver setup:
device_create_file(dev, &dev_attr_version);
You would then ha...
What is the formal difference in Scala between braces and parentheses, and when should they be used?
...ain a couple of examples per the above three rules:
val tupleList = List[(String, String)]()
// doesn't compile, violates case clause requirement
val filtered = tupleList.takeWhile( case (s1, s2) => s1 == s2 )
// block of code as a partial function and parentheses omission,
// i.e. tupleList.ta...
MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
...在.cpp文件的OnInitDialog()之类的函数里实现如下代码：
CString strname[3];
strname[0]="Screen Name";
strname[1]="Form ID";
strname[2]="Category Path";
for(int i=0;i<3;i++)
{
m_List.InsertColumn(i,strname[i],LVCFMT_LEFT,130);
}
在这之前也要将List Control的ID与Cl...
Allow user to select camera or gallery for image
...+ File.separator + "MyDir" + File.separator);
root.mkdirs();
final String fname = Utils.getUniqueImageFilename();
final File sdImageMainDirectory = new File(root, fname);
outputFileUri = Uri.fromFile(sdImageMainDirectory);
// Camera.
final List<Intent> cameraIntents = ...
How to print binary tree diagram?
... n23.left = n33;
return root;
}
public static void main(String[] args) {
BTreePrinter.printNode(test1());
BTreePrinter.printNode(test2());
}
}
class Node<T extends Comparable<?>> {
Node<T> left, right;
T data;
public Node(T dat...
jQuery dot in ID selector? [duplicate]
...
This is also a lot of extra processing on jQuery's part that is unnecessary, where all you really need to do is escape the "." character...
– Ian
Nov 25 '12 at 7:48
...
What are Aggregates and PODs and how/why are they special?
...er-defined constructor is present, it means that the user needs to do some extra work to initialize the members therefore brace initialization would be incorrect. If virtual functions are present, it means that the objects of this class have (on most implementations) a pointer to the so-called vtabl...
Should I impose a maximum length on passwords?
...hed, the password length wouldn't matter to them (hash functions convert a string of any length to a fixed length).
– Vicky Chijwani
Apr 15 '17 at 13:58
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