Module: Parallel

Extended by:
ProcessorCount
Defined in:
lib/parallel.rb,
lib/parallel/version.rb,
lib/parallel/processor_count.rb

Defined Under Namespace

Modules: ProcessorCount Classes: Break, DeadWorker, ExceptionWrapper, JobFactory, Kill, UserInterruptHandler, Worker

Constant Summary collapse

Stop = 
Object.new
VERSION = 
Version = '1.9.0'

Class Method Summary collapse

Methods included from ProcessorCount

physical_processor_count, processor_count

Class Method Details

.each(array, options = {}, &block) ⇒ Object 



202
203
204
205
 
# File 'lib/parallel.rb', line 202

def each(array, options={}, &block)
  map(array, options.merge(:preserve_results => false), &block)
  array
end

.each_with_index(array, options = {}, &block) ⇒ Object 



207
208
209
 
# File 'lib/parallel.rb', line 207

def each_with_index(array, options={}, &block)
  each(array, options.merge(:with_index => true), &block)
end

.in_processes(options = {}, &block) ⇒ Object 



196
197
198
199
200
 
# File 'lib/parallel.rb', line 196

def in_processes(options = {}, &block)
  count, options = extract_count_from_options(options)
  count ||= processor_count
  map(0...count, options.merge(:in_processes => count), &block)
end

.in_threads(options = {:count => 2}) ⇒ Object 



189
190
191
192
193
194
 
# File 'lib/parallel.rb', line 189

def in_threads(options={:count => 2})
  count, _ = extract_count_from_options(options)
  Array.new(count).each_with_index.map do |_, i|
    Thread.new { yield(i) }
  end.map!(&:value)
end

.map(source, options = {}, &block) ⇒ Object 



211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
 
# File 'lib/parallel.rb', line 211

def map(source, options = {}, &block)
  options[:mutex] = Mutex.new

  if RUBY_PLATFORM =~ /java/ and not options[:in_processes]
    method = :in_threads
    size = options[method] || processor_count
  elsif options[:in_threads]
    method = :in_threads
    size = options[method]
  else
    method = :in_processes
    if Process.respond_to?(:fork)
      size = options[method] || processor_count
    else
      warn "Process.fork is not supported by this Ruby"
      size = 0
    end
  end

  job_factory = JobFactory.new(source, options[:mutex])
  size = [job_factory.size, size].min

  options[:return_results] = (options[:preserve_results] != false || !!options[:finish])
  add_progress_bar!(job_factory, options)

  if size == 0
    work_direct(job_factory, options, &block)
  elsif method == :in_threads
    work_in_threads(job_factory, options.merge(:count => size), &block)
  else
    work_in_processes(job_factory, options.merge(:count => size), &block)
  end
end

.map_with_index(array, options = {}, &block) ⇒ Object 



245
246
247
 
# File 'lib/parallel.rb', line 245

def map_with_index(array, options={}, &block)
  map(array, options.merge(:with_index => true), &block)
end

.worker_number ⇒ Object 



249
250
251
 
# File 'lib/parallel.rb', line 249

def worker_number
  Thread.current[:parallel_worker_number]
end

.worker_number=(worker_num) ⇒ Object 



253
254
255
 
# File 'lib/parallel.rb', line 253

def worker_number=(worker_num)
  Thread.current[:parallel_worker_number] = worker_num
end