brew/Library/Homebrew/hardware.rb
2012-07-16 16:26:47 -05:00

77 lines
1.5 KiB
Ruby

class Hardware
# These methods use info spewed out by sysctl.
# Look in <mach/machine.h> for decoding info.
def self.cpu_type
@@cpu_type ||= `/usr/sbin/sysctl -n hw.cputype`.to_i
case @@cpu_type
when 7
:intel
when 18
:ppc
else
:dunno
end
end
def self.intel_family
@@intel_family ||= `/usr/sbin/sysctl -n hw.cpufamily`.to_i
case @@intel_family
when 0x73d67300 # Yonah: Core Solo/Duo
:core
when 0x426f69ef # Merom: Core 2 Duo
:core2
when 0x78ea4fbc # Penryn
:penryn
when 0x6b5a4cd2 # Nehalem
:nehalem
when 0x573B5EEC # Arrandale
:arrandale
when 0x5490B78C # Sandy Bridge
:sandybridge
when 0x1F65E835 # Ivy Bridge
:ivybridge
else
:dunno
end
end
def self.processor_count
@@processor_count ||= `/usr/sbin/sysctl -n hw.ncpu`.to_i
end
def self.cores_as_words
case Hardware.processor_count
when 1 then 'single'
when 2 then 'dual'
when 4 then 'quad'
else
Hardware.processor_count
end
end
def self.is_32_bit?
not self.is_64_bit?
end
def self.is_64_bit?
return @@is_64_bit if defined? @@is_64_bit
@@is_64_bit = self.sysctl_bool("hw.cpu64bit_capable")
end
def self.bits
Hardware.is_64_bit? ? 64 : 32
end
protected
def self.sysctl_bool(property)
result = nil
IO.popen("/usr/sbin/sysctl -n #{property} 2>/dev/null") do |f|
result = f.gets.to_i # should be 0 or 1
end
$?.success? && result == 1 # sysctl call succeded and printed 1
end
end