Mercurial > octave-nkf
view src/DLD-FUNCTIONS/nproc.cc @ 14193:72aebe619641 stable rc-3-6-0-0
3.6.0-rc0 release candidate
* configure.ac (AC_INIT): Version is now 3.6.0-rc0.
(OCTAVE_RELEASE_DATE): Now 2012-01-10.
(OCTAVE_API_VERSION_NUMBER): Now 47.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 10 Jan 2012 16:43:41 -0500 |
parents | 72c96de7a403 |
children | b76f0740940e |
line wrap: on
line source
/* Copyright (C) 2012 Iain Murray This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "defun-dld.h" #include "nproc.h" DEFUN_DLD (nproc, args, nargout, "-*- texinfo -*-\n\ @deftypefn {Loadable Function} {} nproc ()\n\ @deftypefnx {Loadable Function} {} nproc (@var{query})\n\ Return the current number of available processors.\n\ \n\ If called with the optional argument @var{query}, modify how processors\n\ are counted as follows:\n\ @table @code\n\ @item all\n\ total number of processors.\n\ \n\ @item current\n\ processors available to the current process.\n\ \n\ @item overridable\n\ likewise, but overridable through the @w{@env{OMP_NUM_THREADS}} environment\n\ variable.\n\ @end table\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if ((nargin != 0 && nargin != 1) || (nargout != 0 && nargout != 1)) { print_usage (); return retval; } nproc_query query = NPROC_CURRENT; if (nargin == 1) { std::string arg = args(0).string_value (); std::transform (arg.begin (), arg.end (), arg.begin (), tolower); if (arg == "all") query = NPROC_ALL; else if (arg == "current") query = NPROC_CURRENT; else if (arg == "overridable") query = NPROC_CURRENT_OVERRIDABLE; else { error ("nproc: invalid value for QUERY"); return retval; } } retval = num_processors (query); return retval; } /* %% Must always report at least 1 cpu available %!assert (nproc () >= 1); */