// Copyright 2016 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.

module content.mojom;

// See base/memory/memory_coordinator_client.h for the definitions of these
// states.
enum MemoryState {
  UNKNOWN = -1,
  NORMAL = 0,
  THROTTLED = 1,
  SUSPENDED = 2,
};

// ChildMemoryCoordinator lives in a child process and receives memory events
// dispatched by the central memory coordinator which lives in the browser
// process.
interface ChildMemoryCoordinator {
  // Called when the central memory coodinator changes the state for child
  // processes.
  OnStateChange(MemoryState state);

  // Requests the child process to purge memory (e.g. by dropping caches that
  // can be easily rebuilt).
  PurgeMemory();
};