diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/libwebrtc/api/notifier.h | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/api/notifier.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/notifier.h b/third_party/libwebrtc/api/notifier.h new file mode 100644 index 0000000000..fc2480e00a --- /dev/null +++ b/third_party/libwebrtc/api/notifier.h @@ -0,0 +1,68 @@ +/* + * Copyright 2011 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 API_NOTIFIER_H_ +#define API_NOTIFIER_H_ + +#include <list> + +#include "api/media_stream_interface.h" +#include "api/sequence_checker.h" +#include "rtc_base/checks.h" +#include "rtc_base/system/no_unique_address.h" + +namespace webrtc { + +// Implements a template version of a notifier. +// TODO(deadbeef): This is an implementation detail; move out of api/. +template <class T> +class Notifier : public T { + public: + Notifier() { sequence_checker_.Detach(); } + + virtual void RegisterObserver(ObserverInterface* observer) { + RTC_DCHECK_RUN_ON(&sequence_checker_); + RTC_DCHECK(observer != nullptr); + observers_.push_back(observer); + } + + virtual void UnregisterObserver(ObserverInterface* observer) { + RTC_DCHECK_RUN_ON(&sequence_checker_); + for (std::list<ObserverInterface*>::iterator it = observers_.begin(); + it != observers_.end(); it++) { + if (*it == observer) { + observers_.erase(it); + break; + } + } + } + + void FireOnChanged() { + RTC_DCHECK_RUN_ON(&sequence_checker_); + // Copy the list of observers to avoid a crash if the observer object + // unregisters as a result of the OnChanged() call. If the same list is used + // UnregisterObserver will affect the list make the iterator invalid. + std::list<ObserverInterface*> observers = observers_; + for (std::list<ObserverInterface*>::iterator it = observers.begin(); + it != observers.end(); ++it) { + (*it)->OnChanged(); + } + } + + protected: + std::list<ObserverInterface*> observers_ RTC_GUARDED_BY(sequence_checker_); + + private: + RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_; +}; + +} // namespace webrtc + +#endif // API_NOTIFIER_H_ |