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+#ifndef MY_COMPILER_INCLUDED
+#define MY_COMPILER_INCLUDED
+
+/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+
+/**
+ Header for compiler-dependent features.
+
+ Intended to contain a set of reusable wrappers for preprocessor
+ macros, attributes, pragmas, and any other features that are
+ specific to a target compiler.
+*/
+
+#include <my_global.h> /* stddef.h offsetof */
+
+/**
+ Compiler-dependent internal convenience macros.
+*/
+
+/* GNU C/C++ */
+#if defined __GNUC__
+/* Any after 2.95... */
+# define MY_ALIGN_EXT
+
+/* Microsoft Visual C++ */
+#elif defined _MSC_VER
+# define MY_ALIGNOF(type) __alignof(type)
+# define MY_ALIGNED(n) __declspec(align(n))
+
+/* Oracle Solaris Studio */
+#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+# if __SUNPRO_C >= 0x590
+# define MY_ALIGN_EXT
+# endif
+
+/* IBM XL C/C++ */
+#elif defined __xlC__
+# if __xlC__ >= 0x0600
+# define MY_ALIGN_EXT
+# endif
+
+/* HP aCC */
+#elif defined(__HP_aCC) || defined(__HP_cc)
+# if (__HP_aCC >= 60000) || (__HP_cc >= 60000)
+# define MY_ALIGN_EXT
+# endif
+#endif
+
+#ifdef MY_ALIGN_EXT
+/** Specifies the minimum alignment of a type. */
+# define MY_ALIGNOF(type) __alignof__(type)
+/** Determine the alignment requirement of a type. */
+# define MY_ALIGNED(n) __attribute__((__aligned__((n))))
+#endif
+
+/**
+ Generic compiler-dependent features.
+*/
+#ifndef MY_ALIGNOF
+# ifdef __cplusplus
+ template<typename type> struct my_alignof_helper { char m1; type m2; };
+ /* Invalid for non-POD types, but most compilers give the right answer. */
+# define MY_ALIGNOF(type) offsetof(my_alignof_helper<type>, m2)
+# else
+# define MY_ALIGNOF(type) offsetof(struct { char m1; type m2; }, m2)
+# endif
+#endif
+
+/**
+ C++ Type Traits
+*/
+
+#ifdef __cplusplus
+
+/**
+ Opaque storage with a particular alignment.
+*/
+# if defined(MY_ALIGNED)
+/* Partial specialization used due to MSVC++. */
+template<size_t alignment> struct my_alignment_imp;
+template<> struct MY_ALIGNED(1) my_alignment_imp<1> {};
+template<> struct MY_ALIGNED(2) my_alignment_imp<2> {};
+template<> struct MY_ALIGNED(4) my_alignment_imp<4> {};
+template<> struct MY_ALIGNED(8) my_alignment_imp<8> {};
+template<> struct MY_ALIGNED(16) my_alignment_imp<16> {};
+/* ... expand as necessary. */
+# else
+template<size_t alignment>
+struct my_alignment_imp { double m1; };
+# endif
+
+/**
+ A POD type with a given size and alignment.
+
+ @remark If the compiler does not support a alignment attribute
+ (MY_ALIGN macro), the default alignment of a double is
+ used instead.
+
+ @tparam size The minimum size.
+ @tparam alignment The desired alignment: 1, 2, 4, 8 or 16.
+*/
+template <size_t size, size_t alignment>
+struct my_aligned_storage
+{
+ union
+ {
+ char data[size];
+ my_alignment_imp<alignment> align;
+ };
+};
+
+#endif /* __cplusplus */
+
+#include <my_attribute.h>
+
+#endif /* MY_COMPILER_INCLUDED */