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// Copyright 2015 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 CONTENT_BROWSER_MEMORY_MEMORY_MESSAGE_FILTER_H_
#define CONTENT_BROWSER_MEMORY_MEMORY_MESSAGE_FILTER_H_
#include "base/macros.h"
#include "base/memory/memory_pressure_listener.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_message_filter.h"
#include "content/public/common/process_type.h"
namespace content {
class BrowserChildProcessHost;
class RenderProcessHost;
// This class sends memory messages from the browser process.
// See also: child_memory_message_filter.h
class CONTENT_EXPORT MemoryMessageFilter : public BrowserMessageFilter {
public:
MemoryMessageFilter(const BrowserChildProcessHost* child_process_host,
ProcessType process_type);
MemoryMessageFilter(const RenderProcessHost* render_process_host);
// BrowserMessageFilter implementation.
void OnFilterAdded(IPC::Sender* sender) override;
void OnChannelClosing() override;
bool OnMessageReceived(const IPC::Message& message) override;
void SendSetPressureNotificationsSuppressed(bool suppressed);
void SendSimulatePressureNotification(
base::MemoryPressureListener::MemoryPressureLevel level);
void SendPressureNotification(
base::MemoryPressureListener::MemoryPressureLevel level);
protected:
friend class MemoryPressureControllerImpl;
~MemoryMessageFilter() override;
const void* process_host() const { return process_host_; }
ProcessType process_type() const { return process_type_; }
private:
// The untyped process host and ProcessType associated with this filter
// instance. The process host is stored as untyped because it is only used as
// a key in MemoryPressureControllerImpl; at no point is it ever deferenced to
// invoke any members on a process host.
const void* process_host_;
ProcessType process_type_;
DISALLOW_COPY_AND_ASSIGN(MemoryMessageFilter);
};
} // namespace content
#endif // CONTENT_BROWSER_MEMORY_MEMORY_MESSAGE_FILTER_H_
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