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/*
* Copyright (c) 2006 The Regents of The University of Michigan
* All rights reserved.
*
* 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;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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
* OWNER 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.
*
* Authors: Ali Saidi
*/
#ifndef __BASE_COMPILER_HH__
#define __BASE_COMPILER_HH__
#include "config/have_static_assert.hh"
//http://msdn2.microsoft.com/en-us/library/ms937669.aspx
//http://msdn2.microsoft.com/en-us/library/aa448724.aspx
//http://docs.sun.com/source/819-3688/sun.specific.html#marker-998278
//http://gcc.gnu.org/onlinedocs/gcc-3.3.1/gcc/Function-Attributes.html#Function%20Attributes
#if defined(__GNUC__)
#define M5_ATTR_NORETURN __attribute__((noreturn))
#define M5_PRAGMA_NORETURN(x)
#define M5_DUMMY_RETURN
#define M5_VAR_USED __attribute__((unused))
#define M5_ATTR_PACKED __attribute__ ((__packed__))
#define M5_NO_INLINE __attribute__ ((__noinline__))
#elif defined(__SUNPRO_CC)
// this doesn't do anything with sun cc, but why not
#define M5_ATTR_NORETURN __sun_attr__((__noreturn__))
#define M5_DUMMY_RETURN return (0);
#define DO_PRAGMA(x) _Pragma(#x)
#define M5_VAR_USED
#define M5_PRAGMA_NORETURN(x) DO_PRAGMA(does_not_return(x))
#define M5_ATTR_PACKED __attribute__ ((__packed__))
#define M5_NO_INLINE __attribute__ ((__noinline__))
#else
#error "Need to define compiler options in base/compiler.hh"
#endif
/*
* Define a compatibility macro that emulates the behavior of
* static_assert using template magic if the compiler doesn't have
* native support.
*/
#if !HAVE_STATIC_ASSERT
template<bool>
struct static_assert_failure;
template<>
struct static_assert_failure<false> {};
/* The following macro causes the compiler to evaluate the size of the
* static_assert_failure struct. The templates are designed so that
* only static_assert_failure<false> evaluates to a proper size, while
* static_assert_failure<true> generates a compile time error.
*/
#define static_assert(expr, msg) \
namespace ns_static_assert { \
enum { \
static_assert_ ## __LINE__ = \
sizeof(static_assert_failure<!(expr)>) \
}; \
}
#endif
#endif // __BASE_COMPILER_HH__
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