Class: ScriptCore::ServiceProcess

Inherits:
Object
  • Object
show all
Defined in:
lib/script_core/service_process.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, spawner, instruction_quota, instruction_quota_start, memory_quota, environment_variables = {}) ⇒ ServiceProcess

Returns a new instance of ServiceProcess.



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# File 'lib/script_core/service_process.rb', line 7

def initialize(path, spawner, instruction_quota, instruction_quota_start, memory_quota, environment_variables = {})
  @path = path
  @spawner = spawner
  @instruction_quota = instruction_quota
  @instruction_quota_start = instruction_quota_start
  @memory_quota = memory_quota
  @environment_variables = environment_variables
end

Instance Attribute Details

#environment_variables ⇒ Object (readonly)

Returns the value of attribute environment_variables.



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# File 'lib/script_core/service_process.rb', line 5

def environment_variables
  @environment_variables
end

#instruction_quota ⇒ Object (readonly)

Returns the value of attribute instruction_quota.



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# File 'lib/script_core/service_process.rb', line 5

def instruction_quota
  @instruction_quota
end

#instruction_quota_start ⇒ Object (readonly)

Returns the value of attribute instruction_quota_start.



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# File 'lib/script_core/service_process.rb', line 5

def instruction_quota_start
  @instruction_quota_start
end

#memory_quota ⇒ Object (readonly)

Returns the value of attribute memory_quota.



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# File 'lib/script_core/service_process.rb', line 5

def memory_quota
  @memory_quota
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/script_core/service_process.rb', line 5

def path
  @path
end

#spawner ⇒ Object (readonly)

Returns the value of attribute spawner.



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# File 'lib/script_core/service_process.rb', line 5

def spawner
  @spawner
end

Instance Method Details

#open ⇒ Object 



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# File 'lib/script_core/service_process.rb', line 16

def open
  in_reader, in_writer = IO.pipe
  out_reader, out_writer = IO.pipe

  pid = spawner.spawn(
    environment_variables,
    path,
    "-i", instruction_quota.to_s,
    "-C", instruction_quota_start.to_s,
    "-m", memory_quota.to_s,
    in: in_reader,
    out: out_writer,
    unsetenv_others: true
  )

  in_reader.close
  out_writer.close

  in_writer.binmode
  out_reader.binmode

  begin
    yield ScriptCore::ServiceChannel.new(in_writer, out_reader)
  ensure
    code = spawner.wait(pid, Process::WNOHANG) || begin
      begin
        spawner.kill(9, pid)
        spawner.wait(pid)
      rescue Errno::ESRCH
        -1
      end
    end

    out_reader.close
    in_writer.close
  end

  code
end