Class: OsCtl::Lib::MemInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/libosctl/meminfo.rb

Instance Method Summary collapse

Constructor Details

#initialize(file = '/proc/meminfo') ⇒ MemInfo

Returns a new instance of MemInfo.



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# File 'lib/libosctl/meminfo.rb', line 3

def initialize(file = '/proc/meminfo')
  @content = File.read(file)
  @values = {}
end

Instance Method Details

#buffers ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 31

def buffers
  read_param('Buffers')
end

#cached ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 16

def cached
  read_param('Cached')
end

#free(without_cache = true) ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 20

def free(without_cache = true)
  v = read_param('MemFree')

  if without_cache
    v + buffers + swap_cached

  else
    v
  end
end

#read_param(name) ⇒ Object (protected) 



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# File 'lib/libosctl/meminfo.rb', line 53

def read_param(name)
  if @values.has_key?(name)
    @values[name]

  elsif @content =~ /^#{Regexp.escape(name)}:\s*(\d+)\s+kB$/
    @values[name] = ::Regexp.last_match(1).to_i

  end
end

#swap_cached ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 43

def swap_cached
  read_param('SwapCached')
end

#swap_free ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 47

def swap_free
  read_param('SwapFree')
end

#swap_total ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 35

def swap_total
  read_param('SwapTotal')
end

#swap_used ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 39

def swap_used
  swap_total - swap_free
end

#total ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 8

def total
  read_param('MemTotal')
end

#used(without_cache = true) ⇒ Object 



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# File 'lib/libosctl/meminfo.rb', line 12

def used(without_cache = true)
  total - free(without_cache)
end