1 files changed, 46 insertions, 0 deletions
diff --git a/ipc/mscom/ActivationContext.cpp b/ipc/mscom/ActivationContext.cpp
new file mode 100644
index 000000000..2d0261038
--- /dev/null
+++ b/ipc/mscom/ActivationContext.cpp
@@ -0,0 +1,46 @@
+/* -*- 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/ActivationContext.h"
+
+#include "mozilla/Assertions.h"
+#include "mozilla/DebugOnly.h"
+
+namespace mozilla {
+namespace mscom {
+
+ActivationContext::ActivationContext(HMODULE aLoadFromModule)
+  : mActCtx(INVALID_HANDLE_VALUE)
+  , mActivationCookie(0)
+{
+  ACTCTX actCtx = {sizeof(actCtx)};
+  actCtx.dwFlags = ACTCTX_FLAG_RESOURCE_NAME_VALID | ACTCTX_FLAG_HMODULE_VALID;
+  actCtx.lpResourceName = MAKEINTRESOURCE(2);
+  actCtx.hModule = aLoadFromModule;
+
+  mActCtx = ::CreateActCtx(&actCtx);
+  MOZ_ASSERT(mActCtx != INVALID_HANDLE_VALUE);
+  if (mActCtx == INVALID_HANDLE_VALUE) {
+    return;
+  }
+  if (!::ActivateActCtx(mActCtx, &mActivationCookie)) {
+    ::ReleaseActCtx(mActCtx);
+    mActCtx = INVALID_HANDLE_VALUE;
+  }
+}
+
+ActivationContext::~ActivationContext()
+{
+  if (mActCtx == INVALID_HANDLE_VALUE) {
+    return;
+  }
+  DebugOnly<BOOL> deactivated = ::DeactivateActCtx(0, mActivationCookie);
+  MOZ_ASSERT(deactivated);
+  ::ReleaseActCtx(mActCtx);
+}
+
+} // namespace mscom
+} // namespace mozilla