content/common/memory_messages.h

// 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.

// This file contains IPC messages for controlling memory pressure handling
// in child processes for the purposes of enforcing consistent conditions
// across memory measurements.

// Multiply-included message header, no traditional include guard.

#include "base/memory/memory_pressure_listener.h"
#include "ipc/ipc_message_macros.h"
#include "content/common/content_export.h"

#undef IPC_MESSAGE_EXPORT
#define IPC_MESSAGE_EXPORT CONTENT_EXPORT

#define IPC_MESSAGE_START MemoryMsgStart

IPC_ENUM_TRAITS_VALIDATE(
    base::MemoryPressureListener::MemoryPressureLevel,
    (value == base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE ||
     value == base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL))

// Sent to all child processes to enable/disable suppressing memory pressure
// notifications.
IPC_MESSAGE_CONTROL1(MemoryMsg_SetPressureNotificationsSuppressed,
                     bool /* suppressed */)

// Sent to all child processes to simulate a memory pressure notification.
IPC_MESSAGE_CONTROL1(
    MemoryMsg_SimulatePressureNotification,
    base::MemoryPressureListener::MemoryPressureLevel /* level */)

// Sent by the browser to all child processes to indicate an actual memory
// pressure notification.
IPC_MESSAGE_CONTROL1(
    MemoryMsg_PressureNotification,
    base::MemoryPressureListener::MemoryPressureLevel /* level */)