1/*
2 * Copyright (C) 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if ENABLE(RESOURCE_USAGE)
29
30#include "InspectorWebAgentBase.h"
31#include "ResourceUsageData.h"
32#include <JavaScriptCore/InspectorBackendDispatchers.h>
33#include <JavaScriptCore/InspectorFrontendDispatchers.h>
34#include <wtf/MemoryPressureHandler.h>
35
36namespace WebCore {
37
38typedef String ErrorString;
39
40class InspectorMemoryAgent final : public InspectorAgentBase, public Inspector::MemoryBackendDispatcherHandler {
41 WTF_MAKE_NONCOPYABLE(InspectorMemoryAgent);
42 WTF_MAKE_FAST_ALLOCATED;
43public:
44 InspectorMemoryAgent(PageAgentContext&);
45 virtual ~InspectorMemoryAgent() = default;
46
47 void didCreateFrontendAndBackend(Inspector::FrontendRouter*, Inspector::BackendDispatcher*) override;
48 void willDestroyFrontendAndBackend(Inspector::DisconnectReason) override;
49
50 // MemoryBackendDispatcherHandler
51 void enable(ErrorString&) override;
52 void disable(ErrorString&) override;
53 void startTracking(ErrorString&) override;
54 void stopTracking(ErrorString&) override;
55
56 // InspectorInstrumentation
57 void didHandleMemoryPressure(Critical);
58
59private:
60 void collectSample(const ResourceUsageData&);
61
62 std::unique_ptr<Inspector::MemoryFrontendDispatcher> m_frontendDispatcher;
63 RefPtr<Inspector::MemoryBackendDispatcher> m_backendDispatcher;
64 bool m_enabled { false };
65 bool m_tracking { false };
66};
67
68} // namespace WebCore
69
70#endif // ENABLE(RESOURCE_USAGE)
71