// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
module crosapi.mojom;
import "mojo/public/mojom/base/time.mojom";
// Memory pressure level corresponding to MemoryPressureLevel in
// base/memory/memory_pressure_listener.h
[Stable, Extensible]
enum MemoryPressureLevel {
kNone = 0,
kModerate = 1,
kCritical = 2,
};
// Memory pressure status.
// Next MinVersion: 2
[Stable]
struct MemoryPressure {
MemoryPressureLevel level@0;
// The amount of memory to reclaim to reduce the memory pressure level.
uint64 reclaim_target_kb@1;
// The origin time of the memory pressure signal.
[MinVersion=1] mojo_base.mojom.TimeTicks? signal_origin@2;
};
// A renderer process hosting a frame of a page for browser memory usage
// estimation.
// Next MinVersion: 3
[Stable]
struct PageProcess {
int32 pid@0;
// Indicates if this renderer process is hosting a frame of a protected page.
// Discarding a protected page will more negatively impact the user.
bool host_protected_page@1;
// Indicates if this renderer process is hosting a frame of a visible page. A
// visible page is always protected, but discarding a visible page will more
// negatively impact the user than discarding a non-visible protected page.
bool host_visible_page@2;
// Indicates if this renderer process is hosting a frame of a focused page. A
// focused page is always protected and visible, but discarding a focused
// page will more negatively impact the user than discarding a visible but
// not focused page.
[MinVersion=1] bool host_focused_page@3;
// Obtained from CLOCK_MONOTONIC. The ms value at which the tab was last
// visible.
[MinVersion=2] int64 last_visible_ms@4;
};
// Interface for memory pressure observers. Implemented by lacros-chrome. Used
// by ash-chrome to send memory pressure status.
[Stable, Uuid="51b994bb-278f-4df3-9393-2732f2a0dcb3"]
interface MemoryPressureObserver {
// Called when memory pressure status changes.
MemoryPressure@0(MemoryPressure pressure);
};
// Interface to manage chrome resource, e.g. Memory. Implemented by ash-chrome.
[Stable, Uuid="3908db1e-304d-4615-a331-f2f262745bc3"]
interface ResourceManager {
// Adds an observer for memory pressure status.
AddMemoryPressureObserver@0(pending_remote<MemoryPressureObserver> observer);
// Reports Lacros process list corresponding to background web pages.
// DEPRECATED. Use ReportPageProcesses instead.
[MinVersion=1] DEPRECATED_ReportBackgroundProcesses@1(array<int32> pids);
// Reports Lacros process list corresponding to web pages.
[MinVersion=2] ReportPageProcesses@2(array<PageProcess> processes);
};
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