dom/webauthn/WebAuthnPromiseHolder.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #ifndef mozilla_dom_WebAuthnPromiseHolder_h
   6 #define mozilla_dom_WebAuthnPromiseHolder_h
   7
   8 #include "mozilla/MozPromise.h"
   9 #include "nsIWebAuthnResult.h"
  10 #include "nsIWebAuthnPromise.h"
  11 #include "nsIThread.h"
  12
  13 namespace mozilla::dom {
  14
  15 /*
  16  * WebAuthnRegisterPromiseHolder and WebAuthnSignPromiseHolder wrap a
  17  * MozPromiseHolder with an XPCOM interface that allows the contained promise
  18  * to be resolved, rejected, or disconnected safely from any thread.
  19  *
  20  * Calls to Resolve(), Reject(), and Disconnect() are dispatched to the serial
  21  * event target with wich the promise holder was initialized. At most one of
  22  * these calls will be processed; the first call to reach the event target
  23  * wins. Once the promise is initialized with Ensure() the program MUST call
  24  * at least one of Resolve(), Reject(), or Disconnect().
  25  */
  26
  27 using WebAuthnRegisterPromise =
  28     MozPromise<RefPtr<nsIWebAuthnRegisterResult>, nsresult, true>;
  29
  30 using WebAuthnSignPromise =
  31     MozPromise<RefPtr<nsIWebAuthnSignResult>, nsresult, true>;
  32
  33 class WebAuthnRegisterPromiseHolder final : public nsIWebAuthnRegisterPromise {
  34  public:
  35   NS_DECL_THREADSAFE_ISUPPORTS
  36   NS_DECL_NSIWEBAUTHNREGISTERPROMISE
  37
  38   explicit WebAuthnRegisterPromiseHolder(nsISerialEventTarget* aEventTarget)
  39       : mEventTarget(aEventTarget) {}
  40
  41   already_AddRefed<WebAuthnRegisterPromise> Ensure();
  42
  43  private:
  44   ~WebAuthnRegisterPromiseHolder() = default;
  45
  46   nsCOMPtr<nsISerialEventTarget> mEventTarget;
  47   MozPromiseHolder<WebAuthnRegisterPromise> mRegisterPromise;
  48 };
  49
  50 class WebAuthnSignPromiseHolder final : public nsIWebAuthnSignPromise {
  51  public:
  52   NS_DECL_THREADSAFE_ISUPPORTS
  53   NS_DECL_NSIWEBAUTHNSIGNPROMISE
  54
  55   explicit WebAuthnSignPromiseHolder(nsISerialEventTarget* aEventTarget)
  56       : mEventTarget(aEventTarget) {}
  57
  58   already_AddRefed<WebAuthnSignPromise> Ensure();
  59
  60  private:
  61   ~WebAuthnSignPromiseHolder() = default;
  62
  63   nsCOMPtr<nsISerialEventTarget> mEventTarget;
  64   MozPromiseHolder<WebAuthnSignPromise> mSignPromise;
  65 };
  66
  67 }  // namespace mozilla::dom
  68
  69 #endif  // mozilla_dom_WebAuthnPromiseHolder_h