feat update

3party/asyncplusplus/include/async++/parallel_for.h

@@ -0,0 +1,77 @@
+// Copyright (c) 2015 Amanieu d'Antras
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef ASYNCXX_H_
+# error "Do not include this header directly, include <async++.h> instead."
+#endif
+
+namespace async {
+namespace detail {
+
+// Internal implementation of parallel_for that only accepts a partitioner
+// argument.
+template<typename Sched, typename Partitioner, typename Func>
+void internal_parallel_for(Sched& sched, Partitioner partitioner, const Func& func)
+{
+	// Split the partition, run inline if no more splits are possible
+	auto subpart = partitioner.split();
+	if (subpart.begin() == subpart.end()) {
+		for (auto&& i: partitioner)
+			func(std::forward<decltype(i)>(i));
+		return;
+	}
+
+	// Run the function over each half in parallel
+	auto&& t = async::local_spawn(sched, [&sched, &subpart, &func] {
+		detail::internal_parallel_for(sched, std::move(subpart), func);
+	});
+	detail::internal_parallel_for(sched, std::move(partitioner), func);
+	t.get();
+}
+
+} // namespace detail
+
+// Run a function for each element in a range
+template<typename Sched, typename Range, typename Func>
+void parallel_for(Sched& sched, Range&& range, const Func& func)
+{
+	detail::internal_parallel_for(sched, async::to_partitioner(std::forward<Range>(range)), func);
+}
+
+// Overload with default scheduler
+template<typename Range, typename Func>
+void parallel_for(Range&& range, const Func& func)
+{
+	async::parallel_for(::async::default_scheduler(), range, func);
+}
+
+// Overloads with std::initializer_list
+template<typename Sched, typename T, typename Func>
+void parallel_for(Sched& sched, std::initializer_list<T> range, const Func& func)
+{
+	async::parallel_for(sched, async::make_range(range.begin(), range.end()), func);
+}
+template<typename T, typename Func>
+void parallel_for(std::initializer_list<T> range, const Func& func)
+{
+	async::parallel_for(async::make_range(range.begin(), range.end()), func);
+}
+
+} // namespace async