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Name	Size	Permission	Date
contrib	[ DIR ]	drwxr-xr-x	2024-03-03 22:53
ext	[ DIR ]	drwxr-xr-x	2024-03-03 22:53
lib	[ DIR ]	drwxr-xr-x	2024-03-03 22:53
loaders	[ DIR ]	drwxr-xr-x	2024-03-03 22:53
alt_system.rb	3.14 KB	-rw-r--r--	2011-06-23 22:11
application.rb	21.27 KB	-rw-r--r--	2012-11-29 19:16
backtrace.rb	622 B	-rw-r--r--	2012-11-30 03:21
classic_namespace.rb	408 B	-rw-r--r--	2011-06-28 02:45
clean.rb	1 KB	-rw-r--r--	2012-11-15 21:59
cloneable.rb	482 B	-rw-r--r--	2012-11-15 21:59
default_loader.rb	164 B	-rw-r--r--	2011-06-23 22:11
dsl_definition.rb	5.02 KB	-rw-r--r--	2012-11-15 21:59
early_time.rb	273 B	-rw-r--r--	2011-06-23 22:11
file_creation_task.rb	670 B	-rw-r--r--	2011-06-23 22:11
file_list.rb	11.5 KB	-rw-r--r--	2012-11-29 19:16
file_task.rb	1.28 KB	-rw-r--r--	2011-06-23 22:11
file_utils.rb	3.01 KB	-rw-r--r--	2012-12-06 07:35
file_utils_ext.rb	4.1 KB	-rw-r--r--	2012-11-15 21:59
gempackagetask.rb	283 B	-rw-r--r--	2011-06-28 02:45
invocation_chain.rb	962 B	-rw-r--r--	2011-06-23 22:11
invocation_exception_mixin.rb	431 B	-rw-r--r--	2011-06-23 22:11
multi_task.rb	315 B	-rw-r--r--	2012-11-15 21:59
name_space.rb	618 B	-rw-r--r--	2011-06-23 22:11
packagetask.rb	5.07 KB	-rw-r--r--	2011-06-23 22:11
pathmap.rb	26 B	-rw-r--r--	2011-06-23 22:11
phony.rb	351 B	-rw-r--r--	2012-11-15 22:32
private_reader.rb	364 B	-rw-r--r--	2012-11-15 22:01
promise.rb	2.33 KB	-rw-r--r--	2012-11-15 22:01
pseudo_status.rb	422 B	-rw-r--r--	2011-06-23 22:11
rake_module.rb	727 B	-rw-r--r--	2012-11-15 22:32
rake_test_loader.rb	341 B	-rw-r--r--	2011-06-28 02:45
rdoctask.rb	6.55 KB	-rw-r--r--	2012-11-15 21:59
ruby182_test_unit_fix.rb	843 B	-rw-r--r--	2012-11-22 05:32
rule_recursion_overflow_error.rb	353 B	-rw-r--r--	2011-06-23 22:11
runtest.rb	468 B	-rw-r--r--	2012-11-15 22:32
task.rb	10.17 KB	-rw-r--r--	2012-11-29 19:16
task_argument_error.rb	119 B	-rw-r--r--	2011-06-23 22:11
task_arguments.rb	1.63 KB	-rw-r--r--	2012-11-15 21:59
task_manager.rb	8.78 KB	-rw-r--r--	2012-11-15 21:59
tasklib.rb	580 B	-rw-r--r--	2011-06-23 22:11
testtask.rb	5.18 KB	-rw-r--r--	2012-11-15 22:32
thread_history_display.rb	1.1 KB	-rw-r--r--	2012-11-15 22:01
thread_pool.rb	4.67 KB	-rw-r--r--	2012-11-15 22:01
trace_output.rb	488 B	-rw-r--r--	2012-11-29 19:16
version.rb	187 B	-rw-r--r--	2012-12-21 02:34
win32.rb	1.53 KB	-rw-r--r--	2011-06-23 22:11

Rename

module Rake

# A Promise object represents a promise to do work (a chore) in the
  # future. The promise is created with a block and a list of
  # arguments for the block. Calling value will return the value of
  # the promised chore.
  #
  # Used by ThreadPool.
  #
  class Promise               # :nodoc: all
    NOT_SET = Object.new.freeze # :nodoc:

attr_accessor :recorder

# Create a promise to do the chore specified by the block.
    def initialize(args, &block)
      @mutex = Mutex.new
      @result = NOT_SET
      @error = NOT_SET
      @args = args.collect { |a| begin; a.dup; rescue; a; end }
      @block = block
    end

# Return the value of this promise.
    #
    # If the promised chore is not yet complete, then do the work
    # synchronously. We will wait.
    def value
      unless complete?
        stat :sleeping_on, :item_id => object_id
        @mutex.synchronize do
          stat :has_lock_on, :item_id => object_id
          chore
          stat :releasing_lock_on, :item_id => object_id
        end
      end
      error? ? raise(@error) : @result
    end

# If no one else is working this promise, go ahead and do the chore.
    def work
      stat :attempting_lock_on, :item_id => object_id
      if @mutex.try_lock
        stat :has_lock_on, :item_id => object_id
        chore
        stat :releasing_lock_on, :item_id => object_id
        @mutex.unlock
      else
        stat :bailed_on, :item_id => object_id
      end
    end

private

# Perform the chore promised
    def chore
      if complete?
        stat :found_completed, :item_id => object_id
        return
      end
      stat :will_execute, :item_id => object_id
      begin
        @result = @block.call(*@args)
      rescue Exception => e
        @error = e
      end
      stat :did_execute, :item_id => object_id
      discard
    end

# Do we have a result for the promise
    def result?
      ! @result.equal?(NOT_SET)
    end

# Did the promise throw an error
    def error?
      ! @error.equal?(NOT_SET)
    end

# Are we done with the promise
    def complete?
      result? || error?
    end

# free up these items for the GC
    def discard
      @args = nil
      @block = nil
    end

# Record execution statistics if there is a recorder
    def stat(*args)
      @recorder.call(*args) if @recorder
    end

end