--- /dev/null
+/*
+ This file is a part of libcds - Concurrent Data Structures library
+
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+ Source code repo: http://github.com/khizmax/libcds/
+ Download: http://sourceforge.net/projects/libcds/files/
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef CDSLIB_DETAILS_TYPE_PADDING_H
+#define CDSLIB_DETAILS_TYPE_PADDING_H
+
+namespace cds { namespace details {
+
+ //@cond none
+ template <typename T, int Align, int Modulo>
+ struct type_padding_helper: public T
+ {
+ enum {
+ value = Modulo
+ };
+ char _[Align - Modulo] ; // padding
+
+ using T::T;
+ };
+ template <typename T, int Align>
+ struct type_padding_helper<T, Align, 0>: public T
+ {
+ enum {
+ value = 0
+ };
+
+ using T::T;
+ };
+ //@endcond
+
+ /// Automatic alignment type \p T to \p AlignFactor
+ /**
+ The class adds appropriate bytes to type T that the following condition is true:
+ \code
+ sizeof( type_padding<T,AlignFactor>::type ) % AlignFactor == 0
+ \endcode
+ It is guaranteed that count of padding bytes no more than AlignFactor - 1.
+
+ \b Applicability: type \p T must not have constructors another that default ctor.
+ For example, \p T may be any POD type.
+ */
+ template <typename T, int AlignFactor>
+ class type_padding {
+ public:
+ /// Align factor
+ enum {
+ align_factor = AlignFactor <= 0 ? 1 : AlignFactor
+ };
+
+ /// Result type
+ typedef type_padding_helper<T, align_factor, sizeof(T) % align_factor> type;
+
+ /// Padding constant
+ enum {
+ value = type::value
+ };
+ };
+
+}} // namespace cds::details
+#endif // #ifndef CDSLIB_DETAILS_TYPE_PADDING_H