Added alignment template helpers

alignment.h

@@ -0,0 +1,107 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+
+Copyright(c) 2014 jwellbelove
+
+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 __ETL_ALIGNEMENT__
+#define __ETL_ALIGNEMENT__
+
+#include "type_traits.h"
+
+///\defgroup align_at align_at
+/// Creates a variable of the specified type at the specified alignment.
+/// \ingroup utilities
+
+#if !defined(COMPILER_IAR)
+
+#if defined(COMPILER_MICROSOFT)
+#define ETL_ALIGNMENT_PRE(n) __declspec(align(n))
+#define ETL_ALIGNMENT_POST(n)
+#endif
+
+#if defined(COMPILER_GCC)
+#define ETL_ALIGNMENT_PRE(n)
+#define ETL_ALIGNMENT_POST(n) __attribute__((aligned(n)))
+#endif
+
+#if defined (COMPILER_KEIL)
+#define ETL_ALIGNMENT_PRE(n)
+#define ETL_ALIGNMENT_POST(n) __attribute__((aligned(n)))
+#endif
+
+namespace etl
+{ 
+  /// Template declaration.
+  template <typename T, const size_t ALIGNMENT>
+  struct align_at;
+	
+  /// Align 1
+  template <typename T>
+  struct align_at<T, 1>
+  {
+    ETL_ALIGNMENT_PRE(1) T value ETL_ALIGNMENT_POST(1);
+  };
+
+  /// Align 2
+  template <typename T>
+  struct align_at<T, 2>
+  {
+    ETL_ALIGNMENT_PRE(2) T value ETL_ALIGNMENT_POST(2);
+  };
+
+  /// Align 4
+  template <typename T>
+  struct align_at<T, 4>
+  {
+    ETL_ALIGNMENT_PRE(4) T value ETL_ALIGNMENT_POST(4);
+  };
+
+  /// Align 8
+  template <typename T>
+  struct align_at<T, 8>
+  {
+    ETL_ALIGNMENT_PRE(8) T value ETL_ALIGNMENT_POST(8);
+  };
+
+  /// Align 16
+  template <typename T>
+  struct align_at<T, 16>
+  {
+    ETL_ALIGNMENT_PRE(16) T value ETL_ALIGNMENT_POST(16);
+  };
+  
+  /// Align As
+  template <typename TValue, typename TAlign>
+  struct align_as : public align_at<TValue, etl::alignment_of<TAlign>::value>
+  {
+  };
+}
+#endif
+
+#undef ETL_ALIGNMENT_PRE
+#undef ETL_ALIGNMENT_POST
+
+#endif