// 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.
// Next MinVersion: 4

module arc.mojom;

// Describes the type of memory reclaim should be performed on the guest.
enum ReclaimType {
  // Only anonymous memory will be reclaimed.
  ANON,
  // All memory will be reclaimed.
  ALL
};

// Describes a request from host to guest to reclaim memory.
struct ReclaimRequest {
  ReclaimType type;
};

// Describes a response from guest after trying to reclaim memory.
struct ReclaimResult {
  // Number of processes that were reclaimed successfully.
  uint32 reclaimed;
  // Number of processes that were reclaimed unsuccessfully.
  uint32 unreclaimed;
};

// Deprecated method IDs: 1, 2
// Next method ID: 4
interface MemoryInstance {
  // Drops the guest kernel's page caches. Returns true on success.
  DropCaches@0() => (bool result);
  // Reclaims memory from all guest processes.
  [MinVersion=3] Reclaim@3(ReclaimRequest request) => (ReclaimResult result);
};