1 files changed, 62 insertions, 0 deletions
diff --git a/src/seastar/include/seastar/core/make_task.hh b/src/seastar/include/seastar/core/make_task.hh
new file mode 100644
index 000000000..74c521b07
--- /dev/null
+++ b/src/seastar/include/seastar/core/make_task.hh
@@ -0,0 +1,62 @@
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Copyright (C) 2015 Cloudius Systems, Ltd.
+ */
+
+#pragma once
+
+#include <memory>
+#include <seastar/core/task.hh>
+#include <seastar/core/future.hh>
+
+namespace seastar {
+
+template <typename Func>
+class lambda_task final : public task {
+    Func _func;
+    using futurator = futurize<std::result_of_t<Func()>>;
+    typename futurator::promise_type _result;
+public:
+    lambda_task(scheduling_group sg, const Func& func) : task(sg), _func(func) {}
+    lambda_task(scheduling_group sg, Func&& func) : task(sg), _func(std::move(func)) {}
+    typename futurator::type get_future() noexcept { return _result.get_future(); }
+    virtual void run_and_dispose() noexcept override {
+        futurator::invoke(_func).forward_to(std::move(_result));
+        delete this;
+    }
+    virtual task* waiting_task() noexcept override {
+        return _result.waiting_task();
+    }
+};
+
+template <typename Func>
+inline
+lambda_task<Func>*
+make_task(Func&& func) noexcept {
+    return new lambda_task<Func>(current_scheduling_group(), std::forward<Func>(func));
+}
+
+template <typename Func>
+inline
+lambda_task<Func>*
+make_task(scheduling_group sg, Func&& func) noexcept {
+    return new lambda_task<Func>(sg, std::forward<Func>(func));
+}
+
+}