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Diffstat (limited to 'webrtc/base/keep_ref_until_done.h')
-rw-r--r-- | webrtc/base/keep_ref_until_done.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/webrtc/base/keep_ref_until_done.h b/webrtc/base/keep_ref_until_done.h new file mode 100644 index 0000000000..269e1c8657 --- /dev/null +++ b/webrtc/base/keep_ref_until_done.h @@ -0,0 +1,43 @@ +/* + * Copyright 2015 The WebRTC Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef WEBRTC_BASE_KEEP_REF_UNTIL_DONE_H_ +#define WEBRTC_BASE_KEEP_REF_UNTIL_DONE_H_ + +#include "webrtc/base/bind.h" +#include "webrtc/base/callback.h" +#include "webrtc/base/refcount.h" +#include "webrtc/base/scoped_ref_ptr.h" + +namespace rtc { + +namespace impl { +template <class T> +static inline void DoNothing(const scoped_refptr<T>& object) {} +} // namespace impl + +// KeepRefUntilDone keeps a reference to |object| until the returned +// callback goes out of scope. If the returned callback is copied, the +// reference will be released when the last callback goes out of scope. +template <class ObjectT> +static inline Callback0<void> KeepRefUntilDone(ObjectT* object) { + return rtc::Bind(&impl::DoNothing<ObjectT>, scoped_refptr<ObjectT>(object)); +} + +template <class ObjectT> +static inline Callback0<void> KeepRefUntilDone( + const scoped_refptr<ObjectT>& object) { + return rtc::Bind(&impl::DoNothing<ObjectT>, object); +} + +} // namespace rtc + + +#endif // WEBRTC_BASE_KEEP_REF_UNTIL_DONE_H_ |