Fixed race condition that occurs when 'requiring' plugins

lib/cmock_plugin_manager.rb

@@ -4,6 +4,8 @@
 #   [Released under MIT License. Please refer to license.txt for details]
 # ========================================== 
 
+require 'thread'
+
 class CMockPluginManager
 
   attr_accessor :plugins
@@ -14,14 +16,7 @@ class CMockPluginManager
     plugins_to_load.each do |plugin|
       plugin_name = plugin.to_s
       object_name = "CMockGeneratorPlugin" + camelize(plugin_name)
-      begin
+      self.class.plugin_require_mutex.synchronize { load_plugin(plugin_name, object_name, config, utils) }
-        unless (Object.const_defined? object_name)
-          require "#{File.expand_path(File.dirname(__FILE__))}/cmock_generator_plugin_#{plugin_name.downcase}.rb"
-        end
-        @plugins << eval("#{object_name}.new(config, utils)")
-      rescue
-        raise "ERROR: CMock unable to load plugin '#{plugin_name}'"
-      end
     end
     @plugins.sort! {|a,b| a.priority <=> b.priority }
   end
@@ -37,4 +32,24 @@ class CMockPluginManager
   def camelize(lower_case_and_underscored_word)
     lower_case_and_underscored_word.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
   end
+  
+  private
+  
+  def self.plugin_require_mutex
+    @mutex ||= Mutex.new
+  end
+  
+  def load_plugin(plugin_name, object_name, config, utils)
+    begin
+      unless (Object.const_defined? object_name)
+        file_name = "#{File.expand_path(File.dirname(__FILE__))}/cmock_generator_plugin_#{plugin_name.downcase}.rb"
+        require file_name
+      end
+      class_name = Object.const_get(object_name)
+      @plugins << class_name.new(config, utils)
+    rescue
+      file_name = "#{File.expand_path(File.dirname(__FILE__))}/cmock_generator_plugin_#{plugin_name.downcase}.rb"
+      raise "ERROR: CMock unable to load plugin '#{plugin_name}' '#{object_name}' #{file_name}"
+    end
+  end
 end