lib/rscons.rb in rscons-1.9.3 vs lib/rscons.rb in rscons-1.10.0

@@ -1,9 +1,11 @@
 require_relative "rscons/build_target"
 require_relative "rscons/builder"
 require_relative "rscons/cache"
 require_relative "rscons/environment"
+require_relative "rscons/job_set"
+require_relative "rscons/threaded_command"
 require_relative "rscons/varset"
 require_relative "rscons/version"
 
 # default builders
 require_relative "rscons/builders/cfile"
@@ -13,10 +15,12 @@
 require_relative "rscons/builders/install"
 require_relative "rscons/builders/library"
 require_relative "rscons/builders/object"
 require_relative "rscons/builders/preprocess"
 require_relative "rscons/builders/program"
+require_relative "rscons/builders/shared_library"
+require_relative "rscons/builders/shared_object"
 require_relative "rscons/builders/simple_builder"
 
 # Namespace module for rscons classes
 module Rscons
 
@@ -31,17 +35,23 @@
     :Install,
     :Library,
     :Object,
     :Preprocess,
     :Program,
+    :SharedLibrary,
+    :SharedObject,
   ]
 
   # Class to represent a fatal error while building a target.
   class BuildError < RuntimeError; end
 
   class << self
 
+    # @return [Integer]
+    #   The number of threads to use when scheduling subprocesses.
+    attr_accessor :n_threads
+
     # Remove all generated files.
     #
     # @return [void]
     def clean
       cache = Cache.instance
@@ -63,11 +73,15 @@
     #
     # @param path [String] the path to examine.
     #
     # @return [Boolean] Whether the given path is an absolute filesystem path.
     def absolute_path?(path)
-      path =~ %r{^(/|\w:[\\/])}
+      if RUBY_PLATFORM =~ /mingw/
+        path =~ %r{^(?:\w:)?[\\/]}
+      else
+        path.start_with?("/")
+      end
     end
 
     # Return whether the given target is a phony target.
     #
     # @param target [Symbol, String] Target name.
@@ -144,10 +158,48 @@
     # @return [Array<String>] Command used to execute commands.
     def command_executer=(val)
       @command_executer = val
     end
 
+    private
+
+    # Determine the number of threads to use by default.
+    #
+    # @return [Integer]
+    #   The number of threads to use by default.
+    def determine_n_threads
+      # If the user specifies the number of threads in the environment, then
+      # respect that.
+      if ENV["RSCONS_NTHREADS"] =~ /^(\d+)$/
+        return $1.to_i
+      end
+
+      # Otherwise try to figure out how many threads are available on the
+      # host hardware.
+      begin
+        case RbConfig::CONFIG["host_os"]
+        when /linux/
+          return File.read("/proc/cpuinfo").scan(/^processor\s*:/).size
+        when /mswin|mingw/
+          if `wmic cpu get NumberOfLogicalProcessors /value` =~ /NumberOfLogicalProcessors=(\d+)/
+            return $1.to_i
+          end
+        when /darwin/
+          if `sysctl -n hw.ncpu` =~ /(\d+)/
+            return $1.to_i
+          end
+        end
+      rescue
+      end
+
+      # If we can't figure it out, default to 1.
+      1
+    end
+
   end
+
+  @n_threads = determine_n_threads
+
 end
 
 # Unbuffer $stdout
 $stdout.sync = true