1/* 2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#ifndef WEBRTC_BASE_KEEP_REF_UNTIL_DONE_H_ 12#define WEBRTC_BASE_KEEP_REF_UNTIL_DONE_H_ 13 14#include "webrtc/base/bind.h" 15#include "webrtc/base/callback.h" 16#include "webrtc/base/refcount.h" 17#include "webrtc/base/scoped_ref_ptr.h" 18 19namespace rtc { 20 21namespace impl { 22template <class T> 23static inline void DoNothing(const scoped_refptr<T>& object) {} 24} // namespace impl 25 26// KeepRefUntilDone keeps a reference to |object| until the returned 27// callback goes out of scope. If the returned callback is copied, the 28// reference will be released when the last callback goes out of scope. 29template <class ObjectT> 30static inline Callback0<void> KeepRefUntilDone(ObjectT* object) { 31 return rtc::Bind(&impl::DoNothing<ObjectT>, scoped_refptr<ObjectT>(object)); 32} 33 34template <class ObjectT> 35static inline Callback0<void> KeepRefUntilDone( 36 const scoped_refptr<ObjectT>& object) { 37 return rtc::Bind(&impl::DoNothing<ObjectT>, object); 38} 39 40} // namespace rtc 41 42 43#endif // WEBRTC_BASE_KEEP_REF_UNTIL_DONE_H_ 44