/* 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 "mozilla/dom/ProcessIsolation.h"
class nsIEventTarget;
namespace mozilla {
namespace dom {
class BlobImpl;
class ContentChild;
class ContentParent;
class ContentProcess;
}
// namespace dom
namespace ipc {
class PBackgroundChild;
class PBackgroundStarterChild;
// 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 synchronous. GetOrCreateForCurrentThread will
// create the actor if it doesn't exist yet. Thereafter (assuming success)
// GetForCurrentThread() will return the same actor every time.
//
// 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.
//
// InitContentStarter must be called on the main thread
// with an actor bridging to the relevant target process type before these
// methods can be used.
class BackgroundChild final {
friend class mozilla::dom::ContentParent;
friend class mozilla::dom::ContentProcess;
public:
// See above.
static PBackgroundChild* GetForCurrentThread();
// See above.
static PBackgroundChild* GetOrCreateForCurrentThread();
// See above.
static void CloseForCurrentThread();
// See above.
static void InitContentStarter(mozilla::dom::ContentChild* aContent);
// Helpers for doing ValidatePrincipal checks within the content process.
//
// These can be called from any thread, and validate the given principal
// against the process's current remote type.
static bool ValidatePrincipal(
nsIPrincipal* aPrincipal,
const EnumSet<dom::ValidatePrincipalOptions>& aOptions);
static bool ValidatePrincipalInfo(
const PrincipalInfo& aPrincipalInfo,
const EnumSet<dom::ValidatePrincipalOptions>& aOptions);
private:
// Only called by this class's friends.
static void Startup();
};
}
// namespace ipc
}
// namespace mozilla
#endif // mozilla_ipc_backgroundchild_h_