Repo created

TMessagesProj/jni/voip/webrtc/base/task_runner_util.h

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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_TASK_RUNNER_UTIL_H_
+#define BASE_TASK_RUNNER_UTIL_H_
+
+#include <memory>
+#include <utility>
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/logging.h"
+#include "base/post_task_and_reply_with_result_internal.h"
+#include "base/task_runner.h"
+
+namespace base {
+
+// When you have these methods
+//
+//   R DoWorkAndReturn();
+//   void Callback(const R& result);
+//
+// and want to call them in a PostTaskAndReply kind of fashion where the
+// result of DoWorkAndReturn is passed to the Callback, you can use
+// PostTaskAndReplyWithResult as in this example:
+//
+// PostTaskAndReplyWithResult(
+//     target_thread_.task_runner(),
+//     FROM_HERE,
+//     BindOnce(&DoWorkAndReturn),
+//     BindOnce(&Callback));
+//
+// DEPRECATED: Prefer calling|task_runner->PostTaskAndReplyWithResult(...)|
+// directly.
+// TODO(gab): Mass-migrate to the member method.
+template <typename TaskReturnType, typename ReplyArgType>
+bool PostTaskAndReplyWithResult(TaskRunner* task_runner,
+                                const Location& from_here,
+                                OnceCallback<TaskReturnType()> task,
+                                OnceCallback<void(ReplyArgType)> reply) {
+  DCHECK(task);
+  DCHECK(reply);
+  // std::unique_ptr used to avoid the need of a default constructor.
+  auto* result = new std::unique_ptr<TaskReturnType>();
+  return task_runner->PostTaskAndReply(
+      from_here,
+      BindOnce(&internal::ReturnAsParamAdapter<TaskReturnType>, std::move(task),
+               result),
+      BindOnce(&internal::ReplyAdapter<TaskReturnType, ReplyArgType>,
+               std::move(reply), Owned(result)));
+}
+
+}  // namespace base
+
+#endif  // BASE_TASK_RUNNER_UTIL_H_