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Diffstat (limited to '')
| -rw-r--r-- | dom/clients/manager/ClientManager.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/dom/clients/manager/ClientManager.h b/dom/clients/manager/ClientManager.h new file mode 100644 index 0000000000..94504aaee8 --- /dev/null +++ b/dom/clients/manager/ClientManager.h @@ -0,0 +1,151 @@ +/* -*- 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_dom_ClientManager_h +#define _mozilla_dom_ClientManager_h + +#include "mozilla/dom/ClientOpPromise.h" +#include "mozilla/dom/ClientThing.h" +#include "mozilla/dom/PClientManagerChild.h" + +class nsIPrincipal; + +namespace mozilla { +namespace ipc { +class PBackgroundChild; +class PrincipalInfo; +} // namespace ipc +namespace dom { + +class ClientClaimArgs; +class ClientGetInfoAndStateArgs; +class ClientHandle; +class ClientInfo; +class ClientManagerChild; +class ClientMatchAllArgs; +class ClientNavigateArgs; +class ClientOpConstructorArgs; +class ClientOpenWindowArgs; +class ClientSource; +enum class ClientType : uint8_t; +class WorkerPrivate; + +// The ClientManager provides a per-thread singleton interface workering +// with the client subsystem. It allows globals to create ClientSource +// objects. It allows other parts of the system to attach to this globals +// by creating ClientHandle objects. The ClientManager also provides +// methods for querying the list of clients active in the system. +class ClientManager final : public ClientThing<ClientManagerChild> { + friend class ClientManagerChild; + friend class ClientSource; + + ClientManager(); + ~ClientManager(); + + // Utility method to trigger a shutdown of the ClientManager. This + // is called in various error conditions or when the last reference + // is dropped. + void Shutdown(); + + UniquePtr<ClientSource> CreateSourceInternal( + ClientType aType, nsISerialEventTarget* aEventTarget, + const mozilla::ipc::PrincipalInfo& aPrincipal); + + UniquePtr<ClientSource> CreateSourceInternal( + const ClientInfo& aClientInfo, nsISerialEventTarget* aEventTarget); + + already_AddRefed<ClientHandle> CreateHandleInternal( + const ClientInfo& aClientInfo, nsISerialEventTarget* aSerialEventTarget); + + // Utility method to perform an IPC operation. This will create a + // PClientManagerOp actor tied to a MozPromise. The promise will + // resolve or reject with the result of the remote operation. + [[nodiscard]] RefPtr<ClientOpPromise> StartOp( + const ClientOpConstructorArgs& aArgs, + nsISerialEventTarget* aSerialEventTarget); + + // Get or create the TLS singleton. Currently this is only used + // internally and external code indirectly calls it by invoking + // static methods. + static already_AddRefed<ClientManager> GetOrCreateForCurrentThread(); + + // Private methods called by ClientSource + mozilla::dom::WorkerPrivate* GetWorkerPrivate() const; + + // Don't use - use {Expect,Forget}FutureSource instead. + static bool ExpectOrForgetFutureSource( + const ClientInfo& aClientInfo, + bool (PClientManagerChild::*aMethod)(const IPCClientInfo&)); + + public: + // Asynchronously declare that a ClientSource will possibly be constructed + // from an equivalent ClientInfo in the future. This must be called before any + // any ClientHandles are created with the ClientInfo to avoid race conditions + // when ClientHandles query the ClientManagerService. + // + // This method exists so that the ClientManagerService can determine if a + // particular ClientSource can be expected to exist in the future or has + // already existed and been destroyed. + // + // If it's later known that the expected ClientSource will not be + // constructed, ForgetFutureSource must be called. + static bool ExpectFutureSource(const ClientInfo& aClientInfo); + + // May also be called even when the "future" source has become a "real" + // source, in which case this is a no-op. + static bool ForgetFutureSource(const ClientInfo& aClientInfo); + + // Initialize the ClientManager at process start. This + // does book-keeping like creating a TLS identifier, etc. + // This should only be called by process startup code. + static void Startup(); + + static UniquePtr<ClientSource> CreateSource( + ClientType aType, nsISerialEventTarget* aEventTarget, + nsIPrincipal* aPrincipal); + + static UniquePtr<ClientSource> CreateSource( + ClientType aType, nsISerialEventTarget* aEventTarget, + const mozilla::ipc::PrincipalInfo& aPrincipal); + + // Construct a new ClientSource from an existing ClientInfo (and id) rather + // than allocating a new id. + static UniquePtr<ClientSource> CreateSourceFromInfo( + const ClientInfo& aClientInfo, nsISerialEventTarget* aSerialEventTarget); + + // Allocate a new ClientInfo and id without creating a ClientSource. Used + // when we have a redirect that isn't exposed to the process that owns + // the global/ClientSource. + static Maybe<ClientInfo> CreateInfo(ClientType aType, + nsIPrincipal* aPrincipal); + + static already_AddRefed<ClientHandle> CreateHandle( + const ClientInfo& aClientInfo, nsISerialEventTarget* aSerialEventTarget); + + static RefPtr<ClientOpPromise> MatchAll(const ClientMatchAllArgs& aArgs, + nsISerialEventTarget* aTarget); + + static RefPtr<ClientOpPromise> Claim( + const ClientClaimArgs& aArgs, nsISerialEventTarget* aSerialEventTarget); + + static RefPtr<ClientOpPromise> GetInfoAndState( + const ClientGetInfoAndStateArgs& aArgs, + nsISerialEventTarget* aSerialEventTarget); + + static RefPtr<ClientOpPromise> Navigate( + const ClientNavigateArgs& aArgs, + nsISerialEventTarget* aSerialEventTarget); + + static RefPtr<ClientOpPromise> OpenWindow( + const ClientOpenWindowArgs& aArgs, + nsISerialEventTarget* aSerialEventTarget); + + NS_INLINE_DECL_REFCOUNTING(mozilla::dom::ClientManager) +}; + +} // namespace dom +} // namespace mozilla + +#endif // _mozilla_dom_ClientManager_h |