dom/media/PrincipalChangeObserver.h
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 446960 0ceae9db9ec0be18daa1a279511ad305723185d4
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_PRINCIPALCHANGEOBSERVER_H_
#define MOZILLA_PRINCIPALCHANGEOBSERVER_H_

namespace mozilla {
namespace dom {

/**
 * A PrincipalChangeObserver for any type, but originating from DOMMediaStream,
 * then expanded to MediaStreamTrack.
 *
 * Used to learn about dynamic changes to an object's principal.
 * Operations relating to these observers must be confined to the main thread.
 */
template <typename T>
class PrincipalChangeObserver {
 public:
  virtual void PrincipalChanged(T* aArg) = 0;
};

}  // namespace dom
}  // namespace mozilla

#endif /* MOZILLA_PRINCIPALCHANGEOBSERVER_H_ */