Reland "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)
Reland the base->rtc_base without adding stub headers (will be
done in follow-up CL). This preserves git blame history of all files.
BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org
Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012
Reviewed-on: https://chromium-review.googlesource.com/554611
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18821}diff --git a/webrtc/rtc_base/messagehandler.h b/webrtc/rtc_base/messagehandler.h
new file mode 100644
index 0000000..8cb4457
--- /dev/null
+++ b/webrtc/rtc_base/messagehandler.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_RTC_BASE_MESSAGEHANDLER_H_
+#define WEBRTC_RTC_BASE_MESSAGEHANDLER_H_
+
+#include <memory>
+#include <utility>
+
+#include "webrtc/base/constructormagic.h"
+
+namespace rtc {
+
+struct Message;
+
+// Messages get dispatched to a MessageHandler
+
+class MessageHandler {
+ public:
+ virtual ~MessageHandler();
+ virtual void OnMessage(Message* msg) = 0;
+
+ protected:
+ MessageHandler() {}
+
+ private:
+ RTC_DISALLOW_COPY_AND_ASSIGN(MessageHandler);
+};
+
+// Helper class to facilitate executing a functor on a thread.
+template <class ReturnT, class FunctorT>
+class FunctorMessageHandler : public MessageHandler {
+ public:
+ explicit FunctorMessageHandler(const FunctorT& functor)
+ : functor_(functor) {}
+ virtual void OnMessage(Message* msg) {
+ result_ = functor_();
+ }
+ const ReturnT& result() const { return result_; }
+
+ // Returns moved result. Should not call result() or MoveResult() again
+ // after this.
+ ReturnT MoveResult() { return std::move(result_); }
+
+ private:
+ FunctorT functor_;
+ ReturnT result_;
+};
+
+// Specialization for ReturnT of void.
+template <class FunctorT>
+class FunctorMessageHandler<void, FunctorT> : public MessageHandler {
+ public:
+ explicit FunctorMessageHandler(const FunctorT& functor)
+ : functor_(functor) {}
+ virtual void OnMessage(Message* msg) {
+ functor_();
+ }
+ void result() const {}
+ void MoveResult() {}
+
+ private:
+ FunctorT functor_;
+};
+
+} // namespace rtc
+
+#endif // WEBRTC_RTC_BASE_MESSAGEHANDLER_H_