From 0098caf510e6241982fe3c04068d8fa58d839fec Mon Sep 17 00:00:00 2001
From: seki <seki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 27 Jul 2008 00:04:38 +0000
Subject: merged from 1.8

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18228 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/rinda/tuplespace.rb | 111 +++++++++++++++++++++++++++++++++++-------------
 1 file changed, 82 insertions(+), 29 deletions(-)

(limited to 'lib')

diff --git a/lib/rinda/tuplespace.rb b/lib/rinda/tuplespace.rb
index 73e79bb401..b0409dde3b 100644
--- a/lib/rinda/tuplespace.rb
+++ b/lib/rinda/tuplespace.rb
@@ -2,6 +2,8 @@ require 'monitor'
 require 'thread'
 require 'drb/drb'
 require 'rinda/rinda'
+require 'enumerator'
+require 'forwardable'
 
 module Rinda
 
@@ -286,45 +288,70 @@ module Rinda
   # of Tuplespace.
 
   class TupleBag
+    class TupleBin
+      extend Forwardable
+      def_delegators '@bin', :find_all, :delete_if, :each, :empty?
+
+      def initialize
+        @bin = []
+      end
+      
+      def add(tuple)
+        @bin.push(tuple)
+      end
+      
+      def delete(tuple)
+        idx = @bin.rindex(tuple)
+        @bin.delete_at(idx) if idx
+      end
+      
+      def find(&blk)
+        @bin.reverse_each do |x|
+          return x if yield(x)
+        end
+        nil
+      end
+    end
 
     def initialize # :nodoc:
       @hash = {}
+      @enum = Enumerable::Enumerator.new(self, :each_entry)
     end
 
     ##
     # +true+ if the TupleBag to see if it has any expired entries.
 
     def has_expires?
-      @hash.each do |k, v|
-        v.each do |tuple|
-          return true if tuple.expires
-        end
+      @enum.find do |tuple|
+        tuple.expires
       end
-      false
     end
 
     ##
-    # Add +ary+ to the TupleBag.
+    # Add +tuple+ to the TupleBag.
 
-    def push(ary)
-      size = ary.size
-      @hash[size] ||= []
-      @hash[size].push(ary)
+    def push(tuple)
+      key = bin_key(tuple)
+      @hash[key] ||= TupleBin.new
+      @hash[key].add(tuple)
     end
 
     ##
-    # Removes +ary+ from the TupleBag.
+    # Removes +tuple+ from the TupleBag.
 
-    def delete(ary)
-      size = ary.size
-      @hash.fetch(size, []).delete(ary)
+    def delete(tuple)
+      key = bin_key(tuple)
+      bin = @hash[key]
+      return nil unless bin
+      bin.delete(tuple)
+      @hash.delete(key) if bin.empty?
+      tuple
     end
 
     ##
     # Finds all live tuples that match +template+.
-
     def find_all(template)
-      @hash.fetch(template.size, []).find_all do |tuple|
+      bin_for_find(template).find_all do |tuple|
         tuple.alive? && template.match(tuple)
       end
     end
@@ -333,7 +360,7 @@ module Rinda
     # Finds a live tuple that matches +template+.
 
     def find(template)
-      @hash.fetch(template.size, []).find do |tuple|
+      bin_for_find(template).find do |tuple|
         tuple.alive? && template.match(tuple)
       end
     end
@@ -343,7 +370,7 @@ module Rinda
     # +tuple+ and are alive.
 
     def find_all_template(tuple)
-      @hash.fetch(tuple.size, []).find_all do |template|
+      @enum.find_all do |template|
         template.alive? && template.match(tuple)
       end
     end
@@ -354,20 +381,39 @@ module Rinda
 
     def delete_unless_alive
       deleted = []
-      @hash.keys.each do |size|
-        ary = []
-        @hash[size].each do |tuple|
+      @hash.each do |key, bin|
+        bin.delete_if do |tuple|
           if tuple.alive?
-            ary.push(tuple)
+            false
           else
             deleted.push(tuple)
+            true
           end
         end
-        @hash[size] = ary
       end
       deleted
     end
 
+    private
+    def each_entry(&blk)
+      @hash.each do |k, v|
+        v.each(&blk)
+      end
+    end
+
+    def bin_key(tuple)
+      head = tuple[0]
+      if head.class == Symbol
+        return head
+      else
+        false
+      end
+    end
+
+    def bin_for_find(template)
+      key = bin_key(template)
+      key ? @hash.fetch(key, []) : @enum
+    end
   end
 
   ##
@@ -403,8 +449,7 @@ module Rinda
     # Adds +tuple+
 
     def write(tuple, sec=nil)
-      entry = TupleEntry.new(tuple, sec)
-      start_keeper
+      entry = create_entry(tuple, sec)
       synchronize do
         if entry.expired?
           @read_waiter.find_all_template(entry).each do |template|
@@ -414,6 +459,7 @@ module Rinda
           notify_event('delete', entry.value)
         else
           @bag.push(entry)
+          start_keeper if entry.expires
           @read_waiter.find_all_template(entry).each do |template|
             template.read(tuple)
           end
@@ -439,7 +485,6 @@ module Rinda
     def move(port, tuple, sec=nil)
       template = WaitTemplateEntry.new(self, tuple, sec)
       yield(template) if block_given?
-      start_keeper
       synchronize do
         entry = @bag.find(template)
         if entry
@@ -452,6 +497,7 @@ module Rinda
 
         begin
           @take_waiter.push(template)
+          start_keeper if template.expires
           while true
             raise RequestCanceledError if template.canceled?
             raise RequestExpiredError if template.expired?
@@ -476,7 +522,6 @@ module Rinda
     def read(tuple, sec=nil)
       template = WaitTemplateEntry.new(self, tuple, sec)
       yield(template) if block_given?
-      start_keeper
       synchronize do
         entry = @bag.find(template)
         return entry.value if entry
@@ -484,6 +529,7 @@ module Rinda
 
         begin
           @read_waiter.push(template)
+          start_keeper if template.expires
           template.wait
           raise RequestCanceledError if template.canceled?
           raise RequestExpiredError if template.expired?
@@ -529,6 +575,10 @@ module Rinda
 
     private
 
+    def create_entry(tuple, sec)
+      TupleEntry.new(tuple, sec)
+    end
+
     ##
     # Removes dead tuples.
 
@@ -566,9 +616,12 @@ module Rinda
     def start_keeper
       return if @keeper && @keeper.alive?
       @keeper = Thread.new do
-        while need_keeper?
-          keep_clean
+        while true
           sleep(@period)
+          synchronize do
+            break unless need_keeper?
+            keep_clean
+          end
         end
       end
     end
-- 
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