struct Hardware::PID

• Hardware::PID
• Struct
• Value
• Object

Overview

All informations related to the Processes running on your sytem, defined by Process IDentifiers.

pid = Hardware::PID.new           # Default is Process.pid
app = Hardware::PID.new "firefox" # Take the first matching PID

loop do
  sleep 1
  pid.cpu_usage      # => 1.5
  app.cpu_usage.to_i # => 4
end

Defined in:

hardware/pid.cr

Constructors

• .new(pid : Int32 = Process.pid, cpu_total : Bool = true)

  Creates a new Hardware::PID Set to false to avoid setting #cpu_total_current (useful if lots of Hardware::PID are used)

• .new(executable : String, cpu_total = true)

  Creates a new Hardware::PID by finding the executable's pid.

Class Method Summary

• .all(cpu_total = false, &) : Nil

  Yields a Hardware::PID for each PID present on the system.

• .cpu_total_current : Int32

  Used to avoid duplicate operations when lots of Hardware::PID are created (like a top implementation)

• .cpu_total_current=(cpu_total_current : Int32)

  Used to avoid duplicate operations when lots of Hardware::PID are created (like a top implementation)

• .get_pids(executable : String) : Array(Int32)

  Return all pids corresponding of a given executable name.

Instance Method Summary

• #cmdline : String

  Returns /proc/``#pid``/cmdline.

• #command : String

  Returns a String representation of /proc/``#pid``/cmdline.

• #cpu_time(children = false) : Int32

  Returns the CPU time without including ones from children processes.

• #cpu_time_previous : Int32

  Previous #cpu_time.

• #cpu_time_previous=(cpu_time_previous : Int32)

  Previous #cpu_time.

• #cpu_total_previous : Int32

  Previous CPU.new.total.

• #cpu_total_previous=(cpu_total_previous : Int32)

  Previous CPU.new.total.

• #cpu_usage : Float32

  Returns the CPU used in percentage.

• #exe : String

  Returns /proc/``#pid``/exe if readable.

• #exists? : Bool
• #memory : Int32

  Returns the actual memory used by the process.

• #name : String

  Returns the PID name based on #exe or #cmdline.

• #net : Net

  Returns Hardware::Net for #pid

• #pid : Int32

  Pid number

• #stat : Stat

  Returns a parsed /proc/``#pid``/stat.

• #statm : Array(Int32)

  Returns a parsed /proc/``#pid``/statm.

• #status : Hash(String, String)

  Returns a parsed /proc/``#pid``/status.

Constructor Detail

Class Method Detail

Instance Method Detail