Is there a way to check if process is 64 bit or 32 bit?

Question

I am trying to find process type (32 bit/ 64bit) from process pid?

I get the process information and process list from using GetBSDProcessList method described here.

Answer 1

Okay so I did a lot of research and figured out a better solution. Although the sysctl approach works, the documentation states it should be avoided. The method below uses libproc.h's proc_pidinfo function and works similarly to sysctl. This is obviously for Apple's platforms.

bool Is64Bit (int pid)
{
    proc_bsdshortinfo info;
    if (proc_pidinfo (pid, PROC_PIDT_SHORTBSDINFO,
        0, &info, PROC_PIDT_SHORTBSDINFO_SIZE))
        return info.pbsi_flags & PROC_FLAG_LP64;

    return false;
}