C/C++ 获取Windows系统的位数32位或64位的实现代码

2023-09-22 11:53:09 128

C/C++获取Windows系统的位数32位或64位的实现代码

场景

1.在Windows64bit系统开发程序时,某些情况需要判断ProgramFiles路径,但是64bit系统有两个ProgramFiles或ProgramFiles(x86),这时候就需要根据当前系统的位数来获取路径了.

说明

1.通过判断程序是32bit或64bit并没有什么用,因为64bit系统可以运行32bit和64bit程序.

2.64bit系统的kernel32.dll里有一个函数接口IsWow64Process,只需要判断这个dll是否有这个导出函数即可.

例子

//test-OSBit.cpp:定义控制台应用程序的入口点。
//

#include"stdafx.h"
#include
#include"Shlobj.h"
#include


typedefBOOL(WINAPI*LPFN_ISWOW64PROCESS)(HANDLE,PBOOL);

staticLPFN_ISWOW64PROCESSfnIsWow64Process=NULL;

//
//FUNCTION:SafeIsWow64Process(HANDLE,PBOOL)
//
//PURPOSE:ThisisawrapperoftheIsWow64ProcessAPI.Itdetermines
//whetherthespecifiedprocessisrunningunderWOW64.IsWow64Process
//doesnotexistpriortoWindowsXPwithSP2andWindowServer2003with
//SP1.Forcompatibilitywithoperatingsystemsthatdonotsupport
//IsWow64Process,callGetProcAddresstodetectwhetherIsWow64Processis
///implementedinKernel32.dll.IfGetProcAddresssucceeds,itissafeto
//callIsWow64Processdynamically.Otherwise,WOW64isnotpresent.
//
//PARAMETERS:
//*hProcess-Ahandletotheprocess.
//*Wow64Process-ApointertoavaluethatissettoTRUEiftheprocess
//isrunningunderWOW64.Iftheprocessisrunningunder32-bitWindows,
//thevalueissettoFALSE.Iftheprocessisa64-bitapplication
//runningunder64-bitWindows,thevalueisalsosettoFALSE.
//
//RETURNVALUE:Ifthefunctionsucceeds,thereturnvalueisTRUE.If
//IsWow64Processdoesnotexistinkernel32.dll,orthefunctionfails,
//thereturnvalueisFALSE.
//
staticBOOLWINAPISafeIsWow64Process(HANDLEhProcess,PBOOLWow64Process)
{
if(fnIsWow64Process==NULL)
{
//IsWow64Processisnotavailableonallsupportedversionsof
//Windows.UseGetModuleHandletogetahandletotheDLLthat
//containsthefunction,andGetProcAddresstogetapointertothe
//functionifavailable.
HMODULEhModule=GetModuleHandle(L"kernel32.dll");
if(hModule==NULL)
{
returnFALSE;
}

fnIsWow64Process=reinterpret_cast(
GetProcAddress(hModule,"IsWow64Process"));
if(fnIsWow64Process==NULL)
{
returnFALSE;
}
}
returnfnIsWow64Process(hProcess,Wow64Process);
}

//
//FUNCTION:Is64BitOS()
//
//PURPOSE:Thefunctiondetermineswhetherthecurrentoperatingsystemis
//a64-bitoperatingsystem.
//
//RETURNVALUE:ThefunctionreturnsTRUEiftheoperatingsystemis
//64-bit;otherwise,itreturnsFALSE.
//
staticBOOLIs64BitOS()
{
#ifdefined(_WIN64)
returnTRUE;//64-bitprogramsrunonlyonWin64
#elifdefined(_WIN32)
//32-bitprogramsrunonboth32-bitand64-bitWindows
BOOLf64bitOS=FALSE;
return(SafeIsWow64Process(GetCurrentProcess(),&f64bitOS)&&f64bitOS);
#else
returnFALSE;//64-bitWindowsdoesnotsupportWin16
#endif
}

int_tmain(intargc,_TCHAR*argv[])
{
TCHARfolder[MAX_PATH]={0};
if(Is64BitOS())
::SHGetSpecialFolderPath(NULL,folder,CSIDL_PROGRAM_FILESX86,FALSE);
else
::SHGetSpecialFolderPath(NULL,folder,CSIDL_PROGRAM_FILES,FALSE);
std::wcout<<"32bitProgramFiles:"<
输出:
32bitProgramFiles:C:\ProgramFiles(x86)
参考
SHGetSpecialFolderPathfunction
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C/C++ 获取Windows系统的位数32位或64位的实现代码

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