c怎么获取CPU的物理核心数呢？

Question

是CPU的物理核心数，不是线程数。一般电脑都是双核四核的，我要获取的就是这个。

Answer 1

问题已经解决，贴一下代码

//获取CPU物理核心
DWORD GetProcessorCoreCount()
{
PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer=NULL;
DWORD returnLength = 0;
DWORD processCoreCount = 0;
while(true)
{
DWORD ro = GetLogicalProcessorInformation(buffer,&returnLength);
if (ro == FALSE)
{
if(GetLastError() == ERROR_INSUFFICIENT_BUFFER)
{
if (buffer)free(buffer);
buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength);
if(buffer == NULL)return 0;
}
else
{
return 0;
}
}
else
{
break;
}
}
PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr=buffer;
DWORD byteOffest=0;
while (byteOffest + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength)
{
if(ptr->Relationship == RelationProcessorCore)
++processCoreCount;

    byteOffest += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
    ++ptr;
}
free(buffer);
return processCoreCount;

}