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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import <Foundation/Foundation.h>
#include "base/memory/linked_ptr.h"
#include "base/threading/non_thread_safe.h"
namespace web {
// WeakNSObjectCounter is a class to maintain a counter of all the objects
// that are added using |Insert| that are alive.
// This class is not thread safe and objects must be destroyed and created on
// the same thread.
// TODO(stuartmorgan): Remove this once ARC is supported.
class WeakNSObjectCounter : public base::NonThreadSafe {
// Inserts an object. |object| cannot be nil.
void Insert(id object);
// Returns the count of all active objects that have been inserted.
NSUInteger Size() const;
// The object that maintains the number of active items.
linked_ptr<NSUInteger> counter_;
} // namespace web