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// Copyright 2017 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_INSTRUMENTATION_RESOURCE_COORDINATOR_RENDERER_RESOURCE_COORDINATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_INSTRUMENTATION_RESOURCE_COORDINATOR_RENDERER_RESOURCE_COORDINATOR_H_
#include "third_party/blink/renderer/platform/platform_export.h"
namespace blink {
// TODO(chrisha): Remove knowledge of ExecutionContext class from this code!
class ExecutionContext;
class Frame;
class HTMLFrameOwnerElement;
class ScriptState;
class PLATFORM_EXPORT RendererResourceCoordinator {
public:
static void Set(RendererResourceCoordinator* instance);
// This will always return a valid object. However, unless an explicit
// implementation has been provided via Set, it will be a dummy
// implementation.
static RendererResourceCoordinator* Get();
RendererResourceCoordinator() = default;
RendererResourceCoordinator(const RendererResourceCoordinator&) = delete;
RendererResourceCoordinator& operator=(const RendererResourceCoordinator&) =
delete;
virtual ~RendererResourceCoordinator() = default;
// Notifies the browser that the main thread task load is low.
// TODO(chrisha): Move this to a per-agent interface, and drive this off of
// a signal from each agent scheduler when those exist.
virtual void SetMainThreadTaskLoadIsLow(bool) = 0;
// Used for tracking content javascript contexts (frames, workers, worklets,
// etc). These functions are thread-safe.
// Called when a |script_state| is created. Note that |execution_context| may
// be nullptr if the |script_state| is not associated with an
// |execution_context|.
virtual void OnScriptStateCreated(ScriptState* script_state,
ExecutionContext* execution_context) = 0;
// Called when the |script_state| has been detached from the v8::Context
// (and ExecutionContext, if applicable) it was associated with at creation.
// At this point the associated v8::Context is considered "detached" until it
// is garbage collected.
virtual void OnScriptStateDetached(ScriptState* script_state) = 0;
// Called when the |script_state| itself is garbage collected.
virtual void OnScriptStateDestroyed(ScriptState* script_state) = 0;
// Called when |frame| is about to be set as the ContentFrame of |owner|.
virtual void OnBeforeContentFrameAttached(
const Frame& frame,
const HTMLFrameOwnerElement& owner) = 0;
// Called when |frame| is about to be unset as the ContentFrame of |owner|.
virtual void OnBeforeContentFrameDetached(
const Frame& frame,
const HTMLFrameOwnerElement& owner) = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_INSTRUMENTATION_RESOURCE_COORDINATOR_RENDERER_RESOURCE_COORDINATOR_H_
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