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/* Copyright (C) 2015 Wildfire Games.
*
* 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 INCLUDED_EXTERNAL_LIBRARIES_OPENMP
#define INCLUDED_EXTERNAL_LIBRARIES_OPENMP
// allows removing all OpenMP-related code via #define ENABLE_OPENMP 0
// before including this header. (useful during debugging, because the
// VC debugger isn't able to display OpenMP private variables)
#ifdef ENABLE_OPENMP
# if ENABLE_OPENMP && !defined(_OPENMP)
# error "either enable OpenMP in the compiler settings or don't set ENABLE_OPENMP to 1"
# endif
#else // no user preference; default to compiler setting
# ifdef _OPENMP
# define ENABLE_OPENMP 1
# else
# define ENABLE_OPENMP 0
# endif
#endif
#if ENABLE_OPENMP
# include <omp.h>
#else
# define omp_get_num_threads() 1
# define omp_get_thread_num() 0
# define omp_in_parallel() 0
#endif
// wrapper macro that evaluates to nothing if !ENABLE_OPENMP
// (much more convenient than individual #if ENABLE_OPENMP)
#if ENABLE_OPENMP
# if MSC_VERSION
# define OMP(args) __pragma(omp args)
# elif GCC_VERSION
# define OMP _Pragma("omp " #args)
# else
# error "port"
# endif
#else
# define OMP(args)
#endif
#endif // #ifndef INCLUDED_EXTERNAL_LIBRARIES_OPENMP
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