dom/locks/LockRequestParent.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "LockManagerParent.h"
   8 #include "LockRequestParent.h"
   9
  10 #include "mozilla/dom/Promise.h"
  11
  12 namespace mozilla::dom::locks {
  13
  14 mozilla::ipc::IPCResult LockRequestParent::Recv__delete__(bool aAborted) {
  15   RefPtr<LockManagerParent> manager =
  16       static_cast<LockManagerParent*>(Manager());
  17   ManagedLocks& managed = manager->Locks();
  18
  19   DebugOnly<bool> unheld = managed.mHeldLocks.RemoveElement(this);
  20   MOZ_ASSERT_IF(!aAborted, unheld);
  21
  22   if (auto queue = managed.mQueueMap.Lookup(mRequest.name())) {
  23     if (aAborted) {
  24       DebugOnly<bool> dequeued = queue.Data().RemoveElement(this);
  25       MOZ_ASSERT_IF(!unheld, dequeued);
  26     }
  27     manager->ProcessRequestQueue(queue.Data());
  28     if (queue.Data().IsEmpty()) {
  29       // Remove if empty, to prevent the queue map from growing forever
  30       queue.Remove();
  31     }
  32   }
  33   // or else, the queue is removed during the previous lock release (since
  34   // multiple held locks are possible with `shared: true`)
  35   return IPC_OK();
  36 }
  37
  38 }  // namespace mozilla::dom::locks