有关结构的基本问题 [英] Basic Question regarding structs

问题描述

我正在通过Windows设备驱动程序，并且看到了这样的结构代码:

I am going through a windows device driver and I saw struct code like this:

struct driver1
{
       UINT64 Readable     : 1; 
       UINT64 Writable     : 1; 
       UINT64 Executable   : 1; 
       UINT64 Control      : 3; 
       UINT64 Status       : 1; 
       UINT64 Reserved     : 51; 
       UINT64 Available1   : 5; 
       UINT64 IsMapped     : 1;
};

每个UINT64代表一个位吗?冒号代表位吗?

Does each UINT64 represent a single bit ? Does a colon represent bits?

推荐答案

这意味着Readable，Writable和Executable各自占一点，Control占3，Reserved 51等.

This means that Readable, Writable and Executable each take up a bit, Control takes 3, Reserved 51 and so on.

请参阅 http://publications.gbdirect.co.uk/c_book/第6章/bitfields.html 了解更多信息.

UINT64只是意味着整个位域将位于64位无符号整数内.

The UINT64 simply means that the entire bitfield will be inside a 64 bit unsigned integer.

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