how to find number of cpu (cores) available for application?

[Alexander Tormasov]

I am trying to understand how many cpu or/and cored are available for running application.

I check code related to sysctl in libports/src/lib/libc/sysctl.cc<http://sysctl.cc>
and found
extern "C" int __sysctl(const int *name, u_int namelen,
void *oldp, size_t *oldlenp,
const void *newp, size_t newlen)
{
…
/* fallback values */
{
switch(index_a) {

…
case CTL_HW: switch(index_b) {

case HW_MACHINE:
*oldlenp = 0;
return 0;

case HW_NCPU:
*(int*)oldp = 1;
*oldlenp = sizeof(int);
return 0;

} break;

…
in short, if I used standardised for BSD code (like below in golang) it always return 1!

int32
getproccount(void)
{
int mib[2], out;
size_t len;

mib[0] = CTL_HW;
mib[1] = HW_NCPU;
len = sizeof(out);
if(sysctl(mib, 2, &out, &len, NULL, 0) >= 0)
return (int32)out;
else
return 0;
}

Any suggestions? How I can have portable code for Genode to obtain at least NCPU?

Sincerely,
Alexander

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