initial commit

.rubocop.yml

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+PerlBackrefs:
+  Enabled: false

.travis.yml

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+language: ruby
+rvm:
+    - '2.1'
+    - '2.2'
+script:
+  - bundle exec rubocop
+  - bundle exec ruby -e'load "lib/meminfo.rb"; Process.rss; ObjectSpace.memsize'

Gemfile

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+source 'https://rubygems.org'
+
+gemspec

Gemfile.lock

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+PATH
+  remote: .
+  specs:
+    meminfo (0.1.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.0.0)
+    astrolabe (1.3.1)
+      parser (~> 2.2)
+    coderay (1.1.0)
+    method_source (0.8.2)
+    parser (2.2.2.6)
+      ast (>= 1.1, < 3.0)
+    powerpack (0.1.1)
+    pry (0.10.1)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
+      slop (~> 3.4)
+    rainbow (2.0.0)
+    rubocop (0.32.1)
+      astrolabe (~> 1.3)
+      parser (>= 2.2.2.5, < 3.0)
+      powerpack (~> 0.1)
+      rainbow (>= 1.99.1, < 3.0)
+      ruby-progressbar (~> 1.4)
+    ruby-progressbar (1.7.5)
+    slop (3.6.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  meminfo!
+  pry
+  rubocop
+
+BUNDLED WITH
+   1.10.6

LICENSE.md

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+Copyright (c) 2014 Loic Nageleisen
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

lib/meminfo.rb

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+require 'objspace'
+require 'meminfo/ext'
+
+# MemInfo gives a handful of methods allowing inspection of process memory use.
+module MemInfo
+  module_function
+
+  class ProcessNotFound < StandardError; end
+
+  def rss(pid = Process.pid)
+    Integer(ps_rss(pid)) * 1024
+  rescue TypeError
+    raise ProcessNotFound, pid
+  end
+
+  def memsize
+    ObjectSpace.each_object.reduce(0) { |a, e| a + ObjectSpace.memsize_of(e) }
+  end
+
+  private def ps_rss(pid)
+    `ps ax -o rss,pid`.each_line.grep(/^\s*(\d+)\s+#{pid}$/) { $1 }.first
+  end
+end

lib/meminfo/ext.rb

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+Process.instance_eval do
+  def rss(pid = Process.pid)
+    MemInfo.rss(pid)
+  end
+end
+
+ObjectSpace.instance_eval do
+  def memsize
+    MemInfo.memsize
+  end
+end

meminfo.gemspec

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+Gem::Specification.new do |s|
+  s.name        = 'meminfo'
+  s.version     = '0.1.0'
+  s.licenses    = ['MIT']
+  s.summary     = 'Obtain process memory information'
+  s.description = 'Obtain process memory information'
+  s.authors     = ['Loic Nageleisen']
+  s.email       = 'loic.nageleisen@gmail.com'
+  s.files       = ['lib/meminfo.rb', 'lib/meminfo/ext.rb']
+  s.homepage    = 'https://github.com/lloeki/meminfo'
+
+  s.add_development_dependency 'pry'
+  s.add_development_dependency 'rubocop'
+end