* lib/pstore.rb (PStore): fix not to replace ThreadError raised in

#transaction block with PStore::Error.
  [ruby-core:39238] [Bug #5269]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37617 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sun Nov 11 12:56:34 2012  Masaki Matsushita  <glass.saga@gmail.com>
+
+	* lib/pstore.rb (PStore): fix not to replace ThreadError raised in
+	  #transaction block with PStore::Error.
+	  [ruby-core:39238] [Bug #5269]
+
 Sun Nov 11 11:36:19 2012  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* vm_core.h (rb_call_info_t::refinements), compile.c (new_callinfo):

lib/pstore.rb

@@ -309,8 +309,16 @@ class PStore
   #
   def transaction(read_only = false)  # :yields:  pstore
     value = nil
-    raise PStore::Error, "nested transaction" if !@thread_safe && @lock.locked?
-    @lock.synchronize do
+    if !@thread_safe
+      raise PStore::Error, "nested transaction" unless @lock.try_lock
+    else
+      begin
+        @lock.lock
+      rescue ThreadError
+        raise PStore::Error, "nested transaction"
+      end
+    end
+    begin
       @rdonly = read_only
       @abort = false
       file = open_and_lock_file(@filename, read_only)
@@ -335,10 +343,10 @@ class PStore
           value = yield(self)
         end
       end
+    ensure
+      @lock.unlock
     end
     value
-  rescue ThreadError
-    raise PStore::Error, "nested transaction"
   end
 
   private