import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/cache/ManagerId.cpp

@@ -0,0 +1,74 @@
+/* -*- 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 "mozilla/dom/quota/QuotaManager.h"
+#include "nsIPrincipal.h"
+#include "nsProxyRelease.h"
+#include "mozilla/RefPtr.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+namespace dom {
+namespace cache {
+
+using mozilla::dom::quota::QuotaManager;
+
+// static
+nsresult
+ManagerId::Create(nsIPrincipal* aPrincipal, ManagerId** aManagerIdOut)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  // The QuotaManager::GetInfoFromPrincipal() has special logic for system
+  // and about: principals.  We need to use the same modified origin in
+  // order to interpret calls from QM correctly.
+  nsCString quotaOrigin;
+  nsresult rv = QuotaManager::GetInfoFromPrincipal(aPrincipal,
+                                                   nullptr,   // suffix
+                                                   nullptr,   // group
+                                                   &quotaOrigin,
+                                                   nullptr);  // is app
+  if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
+
+  RefPtr<ManagerId> ref = new ManagerId(aPrincipal, quotaOrigin);
+  ref.forget(aManagerIdOut);
+
+  return NS_OK;
+}
+
+already_AddRefed<nsIPrincipal>
+ManagerId::Principal() const
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  nsCOMPtr<nsIPrincipal> ref = mPrincipal;
+  return ref.forget();
+}
+
+ManagerId::ManagerId(nsIPrincipal* aPrincipal, const nsACString& aQuotaOrigin)
+    : 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(mPrincipal.forget());
+}
+
+} // namespace cache
+} // namespace dom
+} // namespace mozilla