Itimer

Drop-in replacement for stdlib Timeout that uses POSIX interval timers instead of threads. Not as portable but much lighter weight. Also includes low-level wrappers for setitimer and getitimer.

Examples

require 'itimer'

begin
  Itimer.timeout(1) { sleep 5 }
rescue Itimer::Timeout
  puts 'Time expired'
end

require 'itimer/compat'

begin
  Timeout::timeout(1) { sleep 5 }
rescue Timeout::Error
  puts 'Time expired'
end

require 'itimer'

Signal.trap('VTALRM') { raise Itimer::Timeout }

begin
  # set :real, :virtual and :prof
  Itimer.set(:virtual, 1)
  do_expensive_computation()
rescue Itimer::Timeout
  puts 'Execution time expired'
end

Signal.trap('ALRM') { print '.' }

Itimer.set_interval(:real, 0.5)
do_expensive_computation()
puts 'Done'

Known Issues

This module is not designed to work with ruby threads. If you set timers in multiple ruby threads at the same time some of them will not fire.

Support

Please report issues at https://github.com/nearbuy/ruby-itimer/issues

Authors

Nate Mueller (natemueller)
Peter Sanford (psanford)

License

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.