gentoo-overlay/dev-ruby/concurrent-ruby/files/concurrent-ruby-1.0.2-alpha.patch

commit af059a7ac7815d1edac67b21e5c1bd6b805d4493
Author: Hans de Graaff <hans@degraaff.org>
Date:   Mon Jul 4 20:09:25 2016 +0200

    Support Alpha architecture for processor_count
    
    Alpha machines with Linux do have /proc/cpuinfo but its format is
    different from normal Linux machines, and most specifically the
    processor entry is missing. Moreover, Alpha machines can be configured
    to compartimentalize their CPUs into different machines leading to
    further confusion when reading /proc/cpuinfo.
    
    Using /usr/bin/nproc seems to be the most reliable method of determining
    the number of processors on Alpha. Since reading /proc/cpuinfo is not
    reliable this patch places the nproc method before trying /proc/cpuinfo.
    
    For futher reference see our downstream bug report at
    https://bugs.gentoo.org/show_bug.cgi?id=587986

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e84c683..18dd8cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+* Support Alpha with `Concurrent::processor_count`
+
 ## Current Release v1.0.2 (2 May 2016)
 
 * Fix bug with `Concurrent::Map` MRI backend `#inspect` method
diff --git a/lib/concurrent/utility/processor_counter.rb b/lib/concurrent/utility/processor_counter.rb
index d18b0bb..e82c0a6 100644
--- a/lib/concurrent/utility/processor_counter.rb
+++ b/lib/concurrent/utility/processor_counter.rb
@@ -28,6 +28,7 @@ module Concurrent
       # processor", which taked into account hyperthreading.
       #
       # * AIX: /usr/sbin/pmcycles (AIX 5+), /usr/sbin/lsdev
+      # * Alpha: /usr/bin/nproc (/proc/cpuinfo exists but cannot be used)
       # * BSD: /sbin/sysctl
       # * Cygwin: /proc/cpuinfo
       # * Darwin: /usr/bin/hwprefs, /usr/sbin/sysctl
@@ -84,6 +85,8 @@ module Concurrent
             result = WIN32OLE.connect("winmgmts://").ExecQuery(
               "select NumberOfLogicalProcessors from Win32_Processor")
             result.to_enum.collect(&:NumberOfLogicalProcessors).reduce(:+)
+          elsif File.executable?("/usr/bin/nproc")
+            IO.popen("/usr/bin/nproc --all").read.to_i
           elsif File.readable?("/proc/cpuinfo")
             IO.read("/proc/cpuinfo").scan(/^processor/).size
           elsif File.executable?("/usr/bin/hwprefs")