From 68d32fe677a7b6be3ccbc300357e79f555c11bf7 Mon Sep 17 00:00:00 2001
From: ronag <ronag@362d55ac-95cf-4e76-9f9a-cbaa9c17b72d>
Date: Mon, 24 Oct 2011 23:53:28 +0000
Subject: [PATCH]

---
 concrt_extras/semaphore.h | 70 ---------------------------------------
 1 file changed, 70 deletions(-)
 delete mode 100644 concrt_extras/semaphore.h

diff --git a/concrt_extras/semaphore.h b/concrt_extras/semaphore.h
deleted file mode 100644
index 572cad351..000000000
--- a/concrt_extras/semaphore.h
+++ /dev/null
@@ -1,70 +0,0 @@
-//--------------------------------------------------------------------------
-// 
-//  Copyright (c) Microsoft Corporation.  All rights reserved. 
-// 
-//  File: concrt_extras.h
-//
-//  Implementation of ConcRT helpers
-//
-//--------------------------------------------------------------------------
-
-#pragma once
-
-#include <concrt.h>
-#include <concurrent_queue.h>
-
-namespace Concurrency
-{	
-	class semaphore
-	{
-	public:
-		explicit semaphore(LONG capacity)
-			  : _semaphore_count(capacity)
-		{
-		}
-
-		// Acquires access to the semaphore.
-		void acquire()
-		{
-			// The capacity of the semaphore is exceeded when the semaphore count 
-			// falls below zero. When this happens, add the current context to the 
-			// back of the wait queue and block the current context.
-			if (InterlockedDecrement(&_semaphore_count) < 0)
-			{
-				_waiting_contexts.push(Concurrency::Context::CurrentContext());
-				Concurrency::Context::Block();
-			}
-		}
-
-		// Releases access to the semaphore.
-		void release()
-		{
-		  // If the semaphore count is negative, unblock the first waiting context.
-			if (InterlockedIncrement(&_semaphore_count) <= 0)
-			{
-			 // A call to acquire might have decremented the counter, but has not
-			 // yet finished adding the context to the queue. 
-			 // Create a spin loop that waits for the context to become available.
-				Concurrency:: Context* waiting = NULL;
-				while(!_waiting_contexts.try_pop(waiting))
-				{
-					Concurrency::wait(0);
-				}
-
-				// Unblock the context.
-				 waiting->Unblock();
-			}
-		}
-
-	private:
-		// The semaphore count.
-		LONG _semaphore_count;
-
-		// A concurrency-safe queue of contexts that must wait to 
-		// acquire the semaphore.
-		Concurrency::concurrent_queue<Concurrency::Context*> _waiting_contexts;
-	   
-		semaphore const &operator =(semaphore const&);  // no assignment operator
-		semaphore(semaphore const &);                   // no copy constructor
-	};
-}
\ No newline at end of file
-- 
2.39.5