【系统信息获取】2，获取操作系统位数

偏执的太偏执、 2022-09-26 02:45 230阅读 0赞

目录[(?)][Link 1][\[-\]][Link 1]

1.  [1涉及API][1_API]
2.  [2使用][2]

## 1，涉及API ##

GetNativeSystemInfo 原型：

**\[cpp\]** [view plain][Link 1] [copy][Link 1]

[![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]

1.  **void** WINAPI GetNativeSystemInfo( 
2.   \_Out\_ LPSYSTEM\_INFO lpSystemInfo 
3.  );

这个函数在kernel32.dll中。

SYSTEM\_INFO 结构：

**\[cpp\]** [view plain][Link 1] [copy][Link 1]

[![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]

1.  **typedef****struct** \_SYSTEM\_INFO \{ 
2.  **union** \{ 
3.  **DWORD** dwOemId; // 已废弃的成员，保留这个成员是为了向以前版本的Windows NT保持兼容
4.  **struct** \{ 
5.  **WORD** wProcessorArchitecture; //指定系统中的中央处理器的体系结构
6.  **WORD** wReserved; 
7.   \}; 
8.   \}; 
9.  **DWORD** dwPageSize; 
10. **LPVOID** lpMinimumApplicationAddress; 
11. **LPVOID** lpMaximumApplicationAddress; 
12. **DWORD\_PTR** dwActiveProcessorMask; 
13. **DWORD** dwNumberOfProcessors; 
14. **DWORD** dwProcessorType; 
15. **DWORD** dwAllocationGranularity; 
16. **WORD** wProcessorLevel; 
17. **WORD** wProcessorRevision; 
18. \} SYSTEM\_INFO, \*LPSYSTEM\_INFO;

## 2，使用 ##

判断系统是否为64位系统的函数：

**\[cpp\]** [view plain][Link 1] [copy][Link 1]

[![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]

1.  **BOOL** Is64BitSystem() 
2.  \{ 
3.   SYSTEM\_INFO si; 
4.   FUN\_GetNativeSystemInfo pfn = (FUN\_GetNativeSystemInfo)GetProcAddress(GetModuleHandle("kernel32.dll"), "GetNativeSystemInfo"); 
5.  **if** (pfn) 
6.   \{ 
7.   pfn(&si); 
8.  
9.  **if** (si.wProcessorArchitecture == PROCESSOR\_ARCHITECTURE\_AMD64 || 
10.  si.wProcessorArchitecture == PROCESSOR\_ARCHITECTURE\_IA64 ) 
11.  \{ 
12. **return** TRUE; 
13.  \} 
14.  \} 
15. **return** FALSE; 
16. \}

当然，目前不是64位，应该可以说就是32位系统了，可以直接写出获取系统位数的函数：

**\[cpp\]** [view plain][Link 1] [copy][Link 1]

[![在CODE上查看代码片][CODE]][CODE_CODE] [![派生到我的代码片][ico_fork.svg]][ico_fork.svg 1]

1.  **int** GetSystemBits() 
2.  \{ 
3.   SYSTEM\_INFO si; 
4.   FUN\_GetNativeSystemInfo pfn = (FUN\_GetNativeSystemInfo)GetProcAddress(GetModuleHandle("kernel32.dll"), "GetNativeSystemInfo"); 
5.  **if** (pfn) 
6.   \{ 
7.   pfn(&si); 
8.  
9.  **if** (si.wProcessorArchitecture == PROCESSOR\_ARCHITECTURE\_AMD64 || 
10.  si.wProcessorArchitecture == PROCESSOR\_ARCHITECTURE\_IA64 ) 
11.  \{ 
12. **return** 64; 
13.  \} 
14.  \} 
15. **return** 32; 
16. \}

[Link 1]: http://blog.csdn.net/dpsying/article/details/18962655#
[1_API]: http://blog.csdn.net/dpsying/article/details/18962655#t0
[2]: http://blog.csdn.net/dpsying/article/details/18962655#t1
[CODE]: https://code.csdn.net/assets/CODE_ico.png
[CODE_CODE]: https://code.csdn.net/snippets/179237
[ico_fork.svg]: https://code.csdn.net/assets/ico_fork.svg
[ico_fork.svg 1]: https://code.csdn.net/snippets/179237/fork