C++ 获得cpu个数

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本文转自：http://www.cppblog.com/Chipset/archive/2009/02/20/74403.html

 

//测试CPU核心个数
#if !defined (_WIN32) && !defined (_WIN64)
#define LINUX
#include
#else
#define WINDOWS
#include
#endif
unsigned core_count()
{
  unsigned count = 1; // 至少一个
  #if defined (LINUX)
  count = sysconf(_SC_NPROCESSORS_CONF);
  #elif defined (WINDOWS)
  SYSTEM_INFO si;
  GetSystemInfo(&si);
  count = si.dwNumberOfProcessors;
  #endif
  return count;
}
#include
int main()
{
  unsigned sz = core_count();
  std::cout << sz << (1 == sz ? "core" : "cores") << '/n';
}

//测试CPU核心个数#if !defined (_WIN32) && !defined (_WIN64)#define LINUX#include #else#define WINDOWS#include #endifunsigned core_count(){  unsigned count = 1; // 至少一个  #if defined (LINUX)  count = sysconf(_SC_NPROCESSORS_CONF);  #elif defined (WINDOWS)  SYSTEM_INFO si;  GetSystemInfo(&si);  count = si.dwNumberOfProcessors;  #endif  return count;}#include int main(){  unsigned sz = core_count();  std::cout << sz << (1 == sz ? "core" : "cores") << '/n';} 

           

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