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//------------------------------------------------------------------------------
// GB_omp.h: definitions using OpenMP in SuiteSparse:GraphBLAS
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#ifndef GB_OMP_H
#define GB_OMP_H
//------------------------------------------------------------------------------
// determine the OpenMP version
//------------------------------------------------------------------------------
#if GB_COMPILER_MSC
// MS Visual Studio supports OpenMP 2.0, and does not have the atomic
// capture clause. However, it has interlocked compare/exchange functions
// that are used instead (see GB_atomics.h).
#include <intrin.h>
#elif defined ( _OPENMP )
// All other compilers must either support OpenMP 3.1 or later, or not use
// OpenMP at all.
#if _OPENMP < 201107
#error "OpenMP 3.1 or later required (recompile without OpenMP)"
#endif
#endif
//------------------------------------------------------------------------------
// OpenMP definitions
//------------------------------------------------------------------------------
#if defined ( _OPENMP )
#include <omp.h>
#define GB_OPENMP_MAX_THREADS omp_get_max_threads ( )
#define GB_OPENMP_GET_NUM_THREADS omp_get_num_threads ( )
#define GB_OPENMP_GET_WTIME omp_get_wtime ( )
#define GB_OPENMP_GET_THREAD_ID omp_get_thread_num ( )
#else
#define GB_OPENMP_MAX_THREADS (1)
#define GB_OPENMP_GET_NUM_THREADS (1)
#define GB_OPENMP_GET_WTIME (0)
#define GB_OPENMP_GET_THREAD_ID (0)
#endif
#endif
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