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35 /* -*- mode: c; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; c-file-style: "stroustrup"; -*-
38 * This source code is part of
42 * GROningen MAchine for Chemical Simulations
44 * Written by the Gromacs development team under coordination of
45 * David van der Spoel, Berk Hess, and Erik Lindahl.
47 * This library is free software; you can redistribute it and/or
48 * modify it under the terms of the GNU Lesser General Public License
49 * as published by the Free Software Foundation; either version 2
50 * of the License, or (at your option) any later version.
52 * To help us fund GROMACS development, we humbly ask that you cite
53 * the research papers on the package. Check out http://www.gromacs.org
56 * GROup of MAchos and Cynical Suckers
61 #include "visibility.h"
62 #include "types/commrec.h"
65 /* This module defines wrappers for OpenMP API functions and enables compiling
66 * code even when OpenMP is turned off in the build system.
67 * Therefore, OpenMP API functions should always be used through these wrappers
68 * and omp.h should never be directly included. Instead, this header should be
69 * used whenever OpenMP API functions are needed.
72 /*! Returns an integer equal to or greater than the number of threads
73 * that would be available if a parallel region without num_threads were
74 * defined at that point in the code. Acts as a wrapper for omp_set_num_threads(void). */
76 int gmx_omp_get_max_threads(void);
78 /*! Returns the number of processors available when the function is called.
79 * Acts as a wrapper around omp_get_num_procs() */
80 int gmx_omp_get_num_procs(void);
82 /*! Returns the thread number of the thread executing within its thread team.
83 * Acts as a wrapper for omp_get_thread_num(void). */
85 int gmx_omp_get_thread_num(void);
87 /*! Sets the number of threads in subsequent parallel regions, unless overridden
88 * by a num_threads clause. Acts as a wrapper for omp_get_max_threads(void). */
90 void gmx_omp_set_num_threads(int num_threads);
92 /*! Check for externally set thread affinity to avoid conflicts with GROMACS internal setting. */
94 void gmx_omp_check_thread_affinity(FILE *fplog, const t_commrec *cr,
95 gmx_hw_opt_t *hw_opt);
97 #endif /* GMX_OMP_H */