Fix some issues with the atomic counter and chef-solo

lib/vagrant/provisioners/chef.rb

@@ -4,6 +4,14 @@ module Vagrant
     # chef-solo and chef-client provisioning are stored. This is **not an actual
     # provisioner**. Instead, {ChefSolo} or {ChefServer} should be used.
     class Chef < Base
+      include Util::Counter
+
+      def initialize(env, config)
+        super
+
+        config.provisioning_path ||= "/tmp/vagrant-chef-#{get_and_update_counter(:provisioning_path)}"
+      end
+
       def prepare
         raise ChefError, :invalid_provisioner
       end
@@ -76,8 +84,6 @@ module Vagrant
     class Chef < Base
       # This is the configuration which is available through `config.chef`
       class Config < Vagrant::Config::Base
-        extend Util::Counter
-
         # Shared config
         attr_accessor :node_name
         attr_accessor :provisioning_path
@@ -95,7 +101,7 @@ module Vagrant
         attr_writer :run_list
 
         def initialize
-          @provisioning_path = "/tmp/vagrant-chef-#{self.class.get_and_update_counter}"
+          @provisioning_path = nil
           @log_level = :info
           @json = {}
           @http_proxy = nil

lib/vagrant/provisioners/chef_solo.rb

@@ -5,6 +5,7 @@ module Vagrant
       register :chef_solo
 
       extend Util::Counter
+      include Util::Counter
 
       class Config < Chef::Config
         attr_accessor :cookbooks_path
@@ -71,7 +72,7 @@ module Vagrant
           remote_path = nil
           if type == :host
             # Path exists on the host, setup the remote path
-            remote_path = "#{config.provisioning_path}/chef-solo-#{self.class.get_and_update_counter}"
+            remote_path = "#{config.provisioning_path}/chef-solo-#{get_and_update_counter(:cookbooks_path)}"
           else
             # Path already exists on the virtual machine. Expand it
             # relative to where we're provisioning.
@@ -88,7 +89,7 @@ module Vagrant
       def share_folders(prefix, folders)
         folders.each do |type, local_path, remote_path|
           if type == :host
-            env.config.vm.share_folder("v-#{prefix}-#{self.class.get_and_update_counter}",
+            env.config.vm.share_folder("v-#{prefix}-#{self.class.get_and_update_counter(:shared_folder)}",
                                        remote_path, local_path, :nfs => config.nfs)
           end
         end

lib/vagrant/util/counter.rb

@@ -5,11 +5,13 @@ module Vagrant
     # Atomic counter implementation. This is useful for incrementing
     # a counter which is guaranteed to only be used once in its class.
     module Counter
-      def get_and_update_counter
+      def get_and_update_counter(name=nil)
+        name ||= :global
+
         mutex.synchronize do
-          @__counter ||= 1
-          result = @__counter
-          @__counter += 1
+          @__counter ||= Hash.new(1)
+          result = @__counter[name]
+          @__counter[name] += 1
           result
         end
       end