Current File : //proc/self/root/proc/self/root/usr/include/OpenEXR/ImathPlatform.h
///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// 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 Industrial Light & Magic 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
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///////////////////////////////////////////////////////////////////////////
#ifndef INCLUDED_IMATHPLATFORM_H
#define INCLUDED_IMATHPLATFORM_H
//----------------------------------------------------------------------------
//
// ImathPlatform.h
//
// This file contains functions and constants which aren't
// provided by the system libraries, compilers, or includes on
// certain platforms.
//
//----------------------------------------------------------------------------
#include <math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923 // pi/2
#endif
//-----------------------------------------------------------------------------
//
// Some, but not all, C++ compilers support the C99 restrict
// keyword or some variant of it, for example, __restrict.
//
//-----------------------------------------------------------------------------
#if defined __GNUC__
//
// supports __restrict
//
#define IMATH_RESTRICT __restrict
#elif defined (__INTEL_COMPILER) || \
defined(__ICL) || \
defined(__ICC) || \
defined(__ECC)
//
// supports restrict
//
#define IMATH_RESTRICT restrict
#elif defined __sgi
//
// supports restrict
//
#define IMATH_RESTRICT restrict
#elif defined _MSC_VER
//
// supports __restrict
//
// #define IMATH_RESTRICT __restrict
#define IMATH_RESTRICT
#else
//
// restrict / __restrict not supported
//
#define IMATH_RESTRICT
#endif
#endif // INCLUDED_IMATHPLATFORM_H
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