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parallel_builder.rb
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parallel_builder.rb
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# encoding: utf-8
# Copyright (c) 2012, HipByte SPRL and contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
class ParallelBuilder
attr_accessor :files
def initialize(builder, platform, flags)
@builders_count = begin
if jobs = ENV['jobs']
jobs.to_i
else
`/usr/sbin/sysctl -n machdep.cpu.thread_count`.strip.to_i
end
end
@builders_count = 1 if @builders_count < 1
@builders = []
@builders_count.times do
queue = []
th = Thread.new do
sleep
objs = []
while path = queue.shift
objs << builder.call(path, flags, platform)
end
queue.concat(objs)
end
@builders << [queue, th]
end
end
def run
builder_i = 0
@files.each do |path|
@builders[builder_i][0] << path
builder_i += 1
builder_i = 0 if builder_i == @builders_count
end
# Start build.
@builders.each do |queue, th|
sleep 0.01 while th.status != 'sleep'
th.wakeup
end
@builders.each { |queue, th| th.join }
@builders
end
def objects
objs = []
builder_i = 0
@files.each do |path|
objs << @builders[builder_i][0].shift
builder_i += 1
builder_i = 0 if builder_i == @builders_count
end
objs
end
end