blob: 7d7c70b3eba1b54159e88a10685f49ec7cf52209 [file] [log] [blame]
* Copyright 2019 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.
#include <string>
#include "api/scoped_refptr.h"
#include "rtc_base/ref_count.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
class Resource;
enum class ResourceUsageState {
// Action is needed to minimze the load on this resource.
// Increasing the load on this resource is desired, if possible.
RTC_EXPORT const char* ResourceUsageStateToString(
ResourceUsageState usage_state);
class RTC_EXPORT ResourceListener {
virtual ~ResourceListener();
virtual void OnResourceUsageStateMeasured(
rtc::scoped_refptr<Resource> resource,
ResourceUsageState usage_state) = 0;
// A Resource monitors an implementation-specific resource. It may report
// kOveruse or kUnderuse when resource usage is high or low enough that we
// should perform some sort of mitigation to fulfil the resource's constraints.
// The methods on this interface are invoked on the adaptation task queue.
// Resource usage measurements may be performed on an any task queue.
// The Resource is reference counted to prevent use-after-free when posting
// between task queues. As such, the implementation MUST NOT make any
// assumptions about which task queue Resource is destructed on.
class RTC_EXPORT Resource : public rtc::RefCountInterface {
// Destruction may happen on any task queue.
~Resource() override;
virtual std::string Name() const = 0;
// The `listener` may be informed of resource usage measurements on any task
// queue, but not after this method is invoked with the null argument.
virtual void SetResourceListener(ResourceListener* listener) = 0;
} // namespace webrtc