1 files changed, 52 insertions, 0 deletions
diff --git a/security/manager/ssl/CryptoTask.h b/security/manager/ssl/CryptoTask.h
new file mode 100644
index 0000000000..2cbd082d7a
--- /dev/null
+++ b/security/manager/ssl/CryptoTask.h
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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__CryptoTask_h
+#define mozilla__CryptoTask_h
+
+#include "mozilla/Attributes.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+
+/**
+ * Frequently we need to run a task on a background thread without blocking
+ * the main thread, and then call a callback on the main thread with the
+ * result. This class provides the framework for that. Subclasses must:
+ *
+ *   (1) Override CalculateResult for the off-the-main-thread computation.
+ *   (2) Override CallCallback() for the on-the-main-thread call of the
+ *       callback.
+ */
+class CryptoTask : public Runnable {
+ public:
+  nsresult Dispatch();
+
+ protected:
+  CryptoTask() : Runnable("CryptoTask"), mRv(NS_ERROR_NOT_INITIALIZED) {}
+
+  virtual ~CryptoTask() = default;
+
+  /**
+   * Called on a background thread (never the main thread). Its result will be
+   * passed to CallCallback on the main thread.
+   */
+  virtual nsresult CalculateResult() = 0;
+
+  /**
+   * Called on the main thread with the result from CalculateResult().
+   */
+  virtual void CallCallback(nsresult rv) = 0;
+
+ private:
+  NS_IMETHOD Run() final;
+
+  nsresult mRv;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla__CryptoTask_h