windows下和linux下获取cpu核数

windows下：

#include "windows.h"
SYSTEM_INFO sysInfo;
GetSystemInfo( &sysInfo );
printf("now system cpu num is %d\n", sysInfo.dwNumberOfProcessors);

跨平台：

#ifndef __linux__
#include "windows.h"
#else

#include "unistd.h"
#include "sys/sysinfo.h"
#endif

#ifndef __linux__
SYSTEM_INFO sysInfo;
GetSystemInfo( &sysInfo );
printf("system cpu num is %d\n", sysInfo.dwNumberOfProcessors);
#else

printf("system cpu num is %d \n", sysconf(_SC_NPROCS_CONF));
printf("system enable num is %d\n", sysconf(_SC_NPROCS_ONLN));

//GNU way
printf("system cpu num is %d\n", get_nprocs_conf());
printf("system enable num is %d\n", get_nprocs());
#endif

转载于：https://blog.csdn.net/hanxv_1987/article/details/79521102