mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 22:25:30 +00:00
4499bcb90f
Instead of an opens, the child sends a new message InitBackground to the parent to create the parent side. Most of this is threading around the endpoints instead of the transport stuff. MozReview-Commit-ID: 2c5SrCEAGyY --HG-- extra : rebase_source : 1ee3d6631c5a7755d8e43342932ab16d9da161cd
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
/* -*- 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_ipc_backgroundchild_h__
|
|
#define mozilla_ipc_backgroundchild_h__
|
|
|
|
#include "base/process.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/ipc/Transport.h"
|
|
|
|
class nsIDOMBlob;
|
|
class nsIIPCBackgroundChildCreateCallback;
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
class BlobImpl;
|
|
class ContentChild;
|
|
class ContentParent;
|
|
class PBlobChild;
|
|
|
|
} // namespace dom
|
|
|
|
namespace ipc {
|
|
|
|
class PBackgroundChild;
|
|
|
|
// This class allows access to the PBackground protocol. PBackground allows
|
|
// communication between any thread (in the parent or a child process) and a
|
|
// single background thread in the parent process. Each PBackgroundChild
|
|
// instance is tied to the thread on which it is created and must not be shared
|
|
// across threads. Each PBackgroundChild is unique and valid as long as its
|
|
// designated thread lives.
|
|
//
|
|
// Creation of PBackground is asynchronous. GetForCurrentThread() will return
|
|
// null until the sequence is complete. GetOrCreateForCurrentThread() will start
|
|
// the creation sequence and will call back via the
|
|
// nsIIPCBackgroundChildCreateCallback interface when completed. Thereafter
|
|
// (assuming success) GetForCurrentThread() will return the same actor every
|
|
// time. SynchronouslyCreateForCurrentThread() will spin the event loop until
|
|
// the BackgroundChild until the creation sequence is complete.
|
|
//
|
|
// CloseForCurrentThread() will close the current PBackground actor. Subsequent
|
|
// calls to GetForCurrentThread will return null. CloseForCurrentThread() may
|
|
// only be called exactly once for each thread-specific actor. Currently it is
|
|
// illegal to call this before the PBackground actor has been created.
|
|
//
|
|
// The PBackgroundChild actor and all its sub-protocol actors will be
|
|
// automatically destroyed when its designated thread completes.
|
|
class BackgroundChild final
|
|
{
|
|
friend class mozilla::dom::ContentChild;
|
|
friend class mozilla::dom::ContentParent;
|
|
|
|
typedef base::ProcessId ProcessId;
|
|
typedef mozilla::ipc::Transport Transport;
|
|
|
|
public:
|
|
// See above.
|
|
static PBackgroundChild*
|
|
GetForCurrentThread();
|
|
|
|
// See above.
|
|
static bool
|
|
GetOrCreateForCurrentThread(nsIIPCBackgroundChildCreateCallback* aCallback);
|
|
|
|
// See above.
|
|
static PBackgroundChild*
|
|
SynchronouslyCreateForCurrentThread();
|
|
|
|
static mozilla::dom::PBlobChild*
|
|
GetOrCreateActorForBlob(PBackgroundChild* aBackgroundActor,
|
|
nsIDOMBlob* aBlob);
|
|
|
|
static mozilla::dom::PBlobChild*
|
|
GetOrCreateActorForBlobImpl(PBackgroundChild* aBackgroundActor,
|
|
mozilla::dom::BlobImpl* aBlobImpl);
|
|
|
|
// See above.
|
|
static void
|
|
CloseForCurrentThread();
|
|
|
|
private:
|
|
// Only called by ContentChild or ContentParent.
|
|
static void
|
|
Startup();
|
|
};
|
|
|
|
} // namespace ipc
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_ipc_backgroundchild_h__
|