def self.freq
if respond_to?(:sysctlbyname, true)
optr = FFI::MemoryPointer.new(:long)
size = FFI::MemoryPointer.new(:size_t)
size.write_long(optr.size)
if RbConfig::CONFIG['host_os'] =~ /bsd/i
name = 'hw.clockrate'
else
name = 'hw.cpufrequency'
end
if sysctlbyname(name, optr, size, nil, 0) < 0
raise Error, "sysctlbyname failed"
end
if RbConfig::CONFIG['host_os'] =~ /darwin/i
optr.read_long / 1000000
else
optr.read_long
end
elsif respond_to?(:sysctl, true)
buf = 0.chr * 16
mib = FFI::MemoryPointer.new(:int, 2)
size = FFI::MemoryPointer.new(:long, 1)
mib.write_array_of_int([CTL_HW, HW_CPU_FREQ])
size.write_int(buf.size)
if sysctl(mib, 2, buf, size, nil, 0) < 0
raise Error, "sysctl function failed"
end
buf.unpack("I*").first / 1000000
else
pinfo = ProcInfo.new
if processor_info(0, pinfo) < 0
if processor_info(1, pinfo) < 0
raise Error, "process_info function failed"
end
end
pinfo[:pi_clock].to_i
end
end