Added untested Event#try? method.

Author: jdantonio

lib/concurrent/atomic/event.rb

@@ -47,6 +47,14 @@ def set
       true
     end
 
+    def try?
+      @mutex.synchronize do
+        return false if @set
+        @set = true
+        @condition.broadcast
+      end
+    end
+
     # Reset a previously set event back to the `unset` state.
     # Has no effect if the `Event` has not yet been set.
     #

spec/concurrent/atomic/event_spec.rb

@@ -21,15 +21,13 @@ module Concurrent
       end
 
       it 'returns false if the event is unset' do
-        #subject.reset
         subject.should_not be_set
       end
     end
 
     context '#set' do
 
       it 'triggers the event' do
-        #subject.reset
         @expected = false
         Thread.new{ subject.wait; @expected = true }
         sleep(0.1)
@@ -44,13 +42,22 @@ module Concurrent
       end
     end
 
+    context '#try?' do
+
+      it 'triggers the event if not already set'
+
+      it 'returns true if not previously set'
+
+      it 'returns false if previously set'
+    end
+
     context '#reset' do
 
       it 'does not change the state of an unset event' do
         subject.reset
         subject.should_not be_set
       end
- 
+
       it 'does not trigger an unset event' do
         @expected = false
         Thread.new{ subject.wait; @expected = true }