3 files changed, 101 insertions, 0 deletions
diff --git a/ipc/mscom/mozglue/ProcessRuntimeShared.cpp b/ipc/mscom/mozglue/ProcessRuntimeShared.cpp
new file mode 100644
index 0000000000..ee4f6b221f
--- /dev/null
+++ b/ipc/mscom/mozglue/ProcessRuntimeShared.cpp
@@ -0,0 +1,31 @@
+/* -*- 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/mscom/ProcessRuntimeShared.h"
+
+#include "mozilla/glue/WinUtils.h"
+
+// We allow multiple ProcessRuntime instances to exist simultaneously (even
+// on separate threads), but only one should be doing the process-wide
+// initialization. These variables provide that mutual exclusion.
+static mozilla::glue::Win32SRWLock gLock;
+static mozilla::mscom::detail::ProcessInitState gProcessInitState =
+    mozilla::mscom::detail::ProcessInitState::Uninitialized;
+
+namespace mozilla {
+namespace mscom {
+namespace detail {
+
+MFBT_API ProcessInitState& BeginProcessRuntimeInit() {
+  gLock.LockExclusive();
+  return gProcessInitState;
+}
+
+MFBT_API void EndProcessRuntimeInit() { gLock.UnlockExclusive(); }
+
+}  // namespace detail
+}  // namespace mscom
+}  // namespace mozilla
diff --git a/ipc/mscom/mozglue/ProcessRuntimeShared.h b/ipc/mscom/mozglue/ProcessRuntimeShared.h
new file mode 100644
index 0000000000..d5a58a7b92
--- /dev/null
+++ b/ipc/mscom/mozglue/ProcessRuntimeShared.h
@@ -0,0 +1,55 @@
+/* -*- 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_mscom_ProcessRuntimeShared_h
+#define mozilla_mscom_ProcessRuntimeShared_h
+
+#include "mozilla/Assertions.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Types.h"
+
+namespace mozilla {
+namespace mscom {
+namespace detail {
+
+enum class ProcessInitState : uint32_t {
+  Uninitialized = 0,
+  PartialSecurityInitialized,
+  PartialGlobalOptions,
+  FullyInitialized,
+};
+
+MFBT_API ProcessInitState& BeginProcessRuntimeInit();
+MFBT_API void EndProcessRuntimeInit();
+
+}  // namespace detail
+
+class MOZ_RAII ProcessInitLock final {
+ public:
+  ProcessInitLock() : mInitState(detail::BeginProcessRuntimeInit()) {}
+
+  ~ProcessInitLock() { detail::EndProcessRuntimeInit(); }
+
+  detail::ProcessInitState GetInitState() const { return mInitState; }
+
+  void SetInitState(const detail::ProcessInitState aNewState) {
+    MOZ_DIAGNOSTIC_ASSERT(aNewState > mInitState);
+    mInitState = aNewState;
+  }
+
+  ProcessInitLock(const ProcessInitLock&) = delete;
+  ProcessInitLock(ProcessInitLock&&) = delete;
+  ProcessInitLock operator=(const ProcessInitLock&) = delete;
+  ProcessInitLock operator=(ProcessInitLock&&) = delete;
+
+ private:
+  detail::ProcessInitState& mInitState;
+};
+
+}  // namespace mscom
+}  // namespace mozilla
+
+#endif  // mozilla_mscom_ProcessRuntimeShared_h
diff --git a/ipc/mscom/mozglue/moz.build b/ipc/mscom/mozglue/moz.build
new file mode 100644
index 0000000000..f52a772324
--- /dev/null
+++ b/ipc/mscom/mozglue/moz.build
@@ -0,0 +1,15 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+FINAL_LIBRARY = "mozglue"
+
+EXPORTS.mozilla.mscom += [
+    "ProcessRuntimeShared.h",
+]
+
+UNIFIED_SOURCES += [
+    "ProcessRuntimeShared.cpp",
+]