【Win】查询处理器架构

问题： 在 arm 架构的 windows 上使用 GetSystemInfo 获取到的 wProcessorArchitecture 参数不准确。

由于 arm 架构的 windows 操作系统非常少见，所以客户端上线时并没有回归过检测 arm 操作系统。导致上线后出现驱动安装失败问题。

目录

• 使用 GetSystemInfo 查询
• 查询注册表

使用 GetSystemInfo 查询

std::string GetNcProcessorArchitecture()
	{
		SYSTEM_INFO si = { 0 };
		GetSystemInfo(&si);
		DWORD architecture = si.wProcessorArchitecture;
#if 0
#define PROCESSOR_ARCHITECTURE_INTEL 0 
#define PROCESSOR_ARCHITECTURE_MIPS 1  
#define PROCESSOR_ARCHITECTURE_ALPHA 2
#define PROCESSOR_ARCHITECTURE_PPC 3
#define PROCESSOR_ARCHITECTURE_SHX 4 
#define PROCESSOR_ARCHITECTURE_ARM 5  
#define PROCESSOR_ARCHITECTURE_IA64 6 
#define PROCESSOR_ARCHITECTURE_ALPHA64 7  
#define PROCESSOR_ARCHITECTURE_MSIL 8  
#define PROCESSOR_ARCHITECTURE_AMD64 9
#define PROCESSOR_ARCHITECTURE_ARM64 12
#endif

		if (architecture == PROCESSOR_ARCHITECTURE_AMD64)
		{
			return "amd64";
		}
		else if (architecture == PROCESSOR_ARCHITECTURE_INTEL)
		{
			return "i386";
		}
		else if (architecture == PROCESSOR_ARCHITECTURE_ARM64 || architecture == PROCESSOR_ARCHITECTURE_ARM)
		{
			return "arm";
		}
	
		return "";
	}

使用 GetSystemInfo 查询的 wProcessorArchitecture 的值为 0。

查询注册表

调研一番后，发现使用注册表的方式更稳妥一点。

#include <iostream>
#include <Windows.h>

int main() {
    HKEY hKey;
    TCHAR processorArchitecture[255];
    DWORD bufferSize = sizeof(processorArchitecture);

    // 打开注册表键
    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT("SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment"), 0, KEY_READ, &hKey) == ERROR_SUCCESS) {
        // 读取注册表值
        if (RegQueryValueEx(hKey, TEXT("PROCESSOR_ARCHITECTURE"), nullptr, nullptr, reinterpret_cast<LPBYTE>(processorArchitecture), &bufferSize) == ERROR_SUCCESS) {
            std::cout << "Processor Architecture: " << processorArchitecture;
        }
      
        // 关闭注册表键
        RegCloseKey(hKey);
    }

    return 0;
}