1 files changed, 60 insertions, 0 deletions
diff --git a/dom/cache/ManagerId.cpp b/dom/cache/ManagerId.cpp
new file mode 100644
index 0000000000..58fcacbea0
--- /dev/null
+++ b/dom/cache/ManagerId.cpp
@@ -0,0 +1,60 @@
+/* -*- 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/. */
+
+#include "mozilla/dom/cache/ManagerId.h"
+
+#include "CacheCommon.h"
+
+#include "mozilla/dom/quota/QuotaManager.h"
+#include "nsIPrincipal.h"
+#include "nsProxyRelease.h"
+#include "mozilla/RefPtr.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla::dom::cache {
+
+using mozilla::dom::quota::QuotaManager;
+
+// static
+Result<SafeRefPtr<ManagerId>, nsresult> ManagerId::Create(
+    nsIPrincipal* aPrincipal) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  // QuotaManager::GetOriginFromPrincipal() has special logic for system
+  // and about: principals.  We need to use the same modified origin in
+  // order to interpret calls from QM correctly.
+  CACHE_TRY_INSPECT(const auto& quotaOrigin,
+                    QuotaManager::GetOriginFromPrincipal(aPrincipal));
+
+  return MakeSafeRefPtr<ManagerId>(aPrincipal, quotaOrigin, ConstructorGuard{});
+}
+
+already_AddRefed<nsIPrincipal> ManagerId::Principal() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  nsCOMPtr<nsIPrincipal> ref = mPrincipal;
+  return ref.forget();
+}
+
+ManagerId::ManagerId(nsIPrincipal* aPrincipal, const nsACString& aQuotaOrigin,
+                     ConstructorGuard)
+    : mPrincipal(aPrincipal), mQuotaOrigin(aQuotaOrigin) {
+  MOZ_DIAGNOSTIC_ASSERT(mPrincipal);
+}
+
+ManagerId::~ManagerId() {
+  // If we're already on the main thread, then default destruction is fine
+  if (NS_IsMainThread()) {
+    return;
+  }
+
+  // Otherwise we need to proxy to main thread to do the release
+
+  // The PBackground worker thread shouldn't be running after the main thread
+  // is stopped.  So main thread is guaranteed to exist here.
+  NS_ReleaseOnMainThread("ManagerId::mPrincipal", mPrincipal.forget());
+}
+
+}  // namespace mozilla::dom::cache