1 files changed, 112 insertions, 0 deletions
diff --git a/ipc/glue/BackgroundParent.h b/ipc/glue/BackgroundParent.h
new file mode 100644
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+++ b/ipc/glue/BackgroundParent.h
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+/* -*- 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_ipc_backgroundparent_h__
+#define mozilla_ipc_backgroundparent_h__
+
+#include "base/process.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/ContentParent.h"
+#include "nsStringFwd.h"
+#include "nsTArrayForwardDeclare.h"
+
+#ifdef DEBUG
+#  include "nsXULAppAPI.h"
+#endif
+
+template <class>
+struct already_AddRefed;
+
+namespace mozilla {
+
+namespace net {
+
+class SocketProcessBridgeParent;
+class SocketProcessParent;
+
+}  // namespace net
+
+namespace dom {
+
+class BlobImpl;
+class ContentParent;
+
+}  // namespace dom
+
+namespace ipc {
+
+class BackgroundStarterParent;
+class PBackgroundParent;
+class PBackgroundStarterParent;
+
+template <class PFooSide>
+class Endpoint;
+
+// This class is not designed for public consumption beyond the few static
+// member functions.
+class BackgroundParent final {
+  friend class mozilla::ipc::BackgroundStarterParent;
+  friend class mozilla::dom::ContentParent;
+  friend class mozilla::net::SocketProcessBridgeParent;
+  friend class mozilla::net::SocketProcessParent;
+
+  using ProcessId = base::ProcessId;
+  using BlobImpl = mozilla::dom::BlobImpl;
+  using ContentParent = mozilla::dom::ContentParent;
+  using ThreadsafeContentParentHandle =
+      mozilla::dom::ThreadsafeContentParentHandle;
+
+ public:
+  // This function allows the caller to determine if the given parent actor
+  // corresponds to a child actor from another process or a child actor from a
+  // different thread in the same process.
+  // This function may only be called on the background thread.
+  static bool IsOtherProcessActor(PBackgroundParent* aBackgroundActor);
+
+  // This function returns a handle to the ContentParent associated with the
+  // parent actor if the parent actor corresponds to a child actor from another
+  // content process. If the parent actor corresponds to a child actor from a
+  // different thread in the same process then this function returns null.
+  //
+  // This function may only be called on the background thread.
+  static ThreadsafeContentParentHandle* GetContentParentHandle(
+      PBackgroundParent* aBackgroundActor);
+
+  static uint64_t GetChildID(PBackgroundParent* aBackgroundActor);
+
+  static void KillHardAsync(PBackgroundParent* aBackgroundActor,
+                            const nsACString& aReason);
+
+ private:
+  // Only called by ContentParent for cross-process actors.
+  static bool AllocStarter(ContentParent* aContent,
+                           Endpoint<PBackgroundStarterParent>&& aEndpoint);
+
+  // Called by SocketProcessBridgeParent and SocketProcessParent for
+  // cross-process actors.
+  static bool AllocStarter(Endpoint<PBackgroundStarterParent>&& aEndpoint);
+};
+
+// Implemented in BackgroundImpl.cpp.
+bool IsOnBackgroundThread();
+
+#ifdef DEBUG
+
+// Implemented in BackgroundImpl.cpp.
+void AssertIsOnBackgroundThread();
+
+#else
+
+inline void AssertIsOnBackgroundThread() {}
+
+#endif  // DEBUG
+
+inline void AssertIsInMainProcess() { MOZ_ASSERT(XRE_IsParentProcess()); }
+
+}  // namespace ipc
+}  // namespace mozilla
+
+#endif  // mozilla_ipc_backgroundparent_h__