feat update

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

@@ -0,0 +1,99 @@
+// 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.
+
+namespace async {
+namespace detail {
+
+// Allocate an aligned block of memory
+LIBASYNC_EXPORT void* aligned_alloc(std::size_t size, std::size_t align);
+
+// Free an aligned block of memory
+LIBASYNC_EXPORT void aligned_free(void* addr) LIBASYNC_NOEXCEPT;
+
+// Class representing an aligned array and its length
+template<typename T, std::size_t Align = std::alignment_of<T>::value>
+class aligned_array {
+	std::size_t length;
+	T* ptr;
+
+public:
+	aligned_array()
+		: length(0), ptr(nullptr) {}
+	aligned_array(std::nullptr_t)
+		: length(0), ptr(nullptr) {}
+	explicit aligned_array(std::size_t length_)
+		: length(length_)
+	{
+		ptr = static_cast<T*>(aligned_alloc(length * sizeof(T), Align));
+		std::size_t i;
+		LIBASYNC_TRY {
+			for (i = 0; i < length; i++)
+				new(ptr + i) T;
+		} LIBASYNC_CATCH(...) {
+			for (std::size_t j = 0; j < i; j++)
+				ptr[i].~T();
+			aligned_free(ptr);
+			LIBASYNC_RETHROW();
+		}
+	}
+	aligned_array(aligned_array&& other) LIBASYNC_NOEXCEPT
+		: length(other.length), ptr(other.ptr)
+	{
+		other.ptr = nullptr;
+		other.length = 0;
+	}
+	aligned_array& operator=(aligned_array&& other) LIBASYNC_NOEXCEPT
+	{
+		aligned_array(std::move(*this));
+		std::swap(ptr, other.ptr);
+		std::swap(length, other.length);
+		return *this;
+	}
+	aligned_array& operator=(std::nullptr_t)
+	{
+		return *this = aligned_array();
+	}
+	~aligned_array()
+	{
+		for (std::size_t i = 0; i < length; i++)
+			ptr[i].~T();
+		aligned_free(ptr);
+	}
+
+	T& operator[](std::size_t i) const
+	{
+		return ptr[i];
+	}
+	std::size_t size() const
+	{
+		return length;
+	}
+	T* get() const
+	{
+		return ptr;
+	}
+	explicit operator bool() const
+	{
+		return ptr != nullptr;
+	}
+};
+
+} // namespace detail
+} // namespace async