Mercurial > octave-nkf
annotate libinterp/corefcn/nproc.cc @ 20207:4f45eaf83908 stable
doc: Update more docstrings to have one sentence summary as first line.
Reviewed libinterp/corefcn directory.
* libinterp/corefcn/__ilu__.cc, libinterp/corefcn/balance.cc,
libinterp/corefcn/besselj.cc, libinterp/corefcn/betainc.cc,
libinterp/corefcn/bitfcns.cc, libinterp/corefcn/bsxfun.cc,
libinterp/corefcn/cellfun.cc, libinterp/corefcn/colloc.cc,
libinterp/corefcn/conv2.cc, libinterp/corefcn/data.cc,
libinterp/corefcn/debug.cc, libinterp/corefcn/defaults.cc,
libinterp/corefcn/det.cc, libinterp/corefcn/dirfns.cc,
libinterp/corefcn/dlmread.cc, libinterp/corefcn/dot.cc,
libinterp/corefcn/eig.cc, libinterp/corefcn/error.cc,
libinterp/corefcn/fft2.cc, libinterp/corefcn/fftn.cc,
libinterp/corefcn/file-io.cc, libinterp/corefcn/filter.cc,
libinterp/corefcn/find.cc, libinterp/corefcn/gammainc.cc,
libinterp/corefcn/gcd.cc, libinterp/corefcn/getgrent.cc,
libinterp/corefcn/getpwent.cc, libinterp/corefcn/getrusage.cc,
libinterp/corefcn/graphics.cc, libinterp/corefcn/help.cc,
libinterp/corefcn/hex2num.cc, libinterp/corefcn/input.cc,
libinterp/corefcn/inv.cc, libinterp/corefcn/kron.cc,
libinterp/corefcn/load-path.cc, libinterp/corefcn/load-save.cc,
libinterp/corefcn/lookup.cc, libinterp/corefcn/ls-oct-ascii.cc,
libinterp/corefcn/lsode.cc, libinterp/corefcn/lu.cc,
libinterp/corefcn/luinc.cc, libinterp/corefcn/mappers.cc,
libinterp/corefcn/matrix_type.cc, libinterp/corefcn/max.cc,
libinterp/corefcn/md5sum.cc, libinterp/corefcn/mgorth.cc,
libinterp/corefcn/nproc.cc, libinterp/corefcn/oct-hist.cc,
libinterp/corefcn/ordschur.cc, libinterp/corefcn/pager.cc,
libinterp/corefcn/pinv.cc, libinterp/corefcn/pr-output.cc,
libinterp/corefcn/pt-jit.cc, libinterp/corefcn/quad.cc,
libinterp/corefcn/quadcc.cc, libinterp/corefcn/qz.cc,
libinterp/corefcn/rand.cc, libinterp/corefcn/rcond.cc,
libinterp/corefcn/regexp.cc, libinterp/corefcn/schur.cc,
libinterp/corefcn/sighandlers.cc, libinterp/corefcn/sparse.cc,
libinterp/corefcn/spparms.cc, libinterp/corefcn/str2double.cc,
libinterp/corefcn/strfind.cc, libinterp/corefcn/strfns.cc,
libinterp/corefcn/sub2ind.cc, libinterp/corefcn/svd.cc,
libinterp/corefcn/symtab.cc, libinterp/corefcn/syscalls.cc,
libinterp/corefcn/sysdep.cc, libinterp/corefcn/time.cc,
libinterp/corefcn/toplev.cc, libinterp/corefcn/tril.cc,
libinterp/corefcn/tsearch.cc, libinterp/corefcn/typecast.cc,
libinterp/corefcn/urlwrite.cc, libinterp/corefcn/utils.cc,
libinterp/corefcn/variables.cc, scripts/polynomial/spline.m:
Update more docstrings to have one sentence summary as first line.
author | Rik <rik@octave.org> |
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date | Sat, 09 May 2015 17:19:30 -0700 |
parents | 4197fc428c7d |
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1 /* |
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2 |
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3 Copyright (C) 2012-2015 Iain Murray |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include "defun.h" |
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28 #include "nproc.h" |
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29 |
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30 DEFUN (nproc, args, nargout, |
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31 "-*- texinfo -*-\n\ |
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32 @deftypefn {Built-in Function} {} nproc ()\n\ |
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33 @deftypefnx {Built-in Function} {} nproc (@var{query})\n\ |
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34 Return the current number of available processors.\n\ |
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35 \n\ |
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36 If called with the optional argument @var{query}, modify how processors\n\ |
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37 are counted as follows:\n\ |
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38 \n\ |
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39 @table @code\n\ |
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40 @item all\n\ |
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41 total number of processors.\n\ |
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42 \n\ |
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43 @item current\n\ |
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44 processors available to the current process.\n\ |
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45 \n\ |
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46 @item overridable\n\ |
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47 same as @code{current}, but overridable through the @w{@env{OMP_NUM_THREADS}}\n\ |
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48 environment variable.\n\ |
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49 @end table\n\ |
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50 @end deftypefn") |
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51 { |
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52 octave_value retval; |
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53 |
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54 int nargin = args.length (); |
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55 |
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56 if ((nargin != 0 && nargin != 1) || (nargout != 0 && nargout != 1)) |
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57 { |
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58 print_usage (); |
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59 return retval; |
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60 } |
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61 |
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62 nproc_query query = NPROC_CURRENT; |
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63 if (nargin == 1) |
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64 { |
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65 std::string arg = args(0).string_value (); |
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66 |
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67 std::transform (arg.begin (), arg.end (), arg.begin (), tolower); |
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68 |
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69 if (arg == "all") |
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70 query = NPROC_ALL; |
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71 else if (arg == "current") |
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72 query = NPROC_CURRENT; |
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73 else if (arg == "overridable") |
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74 query = NPROC_CURRENT_OVERRIDABLE; |
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75 else |
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76 { |
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77 error ("nproc: invalid value for QUERY"); |
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78 return retval; |
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79 } |
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80 } |
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81 |
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82 retval = num_processors (query); |
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83 |
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84 return retval; |
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85 } |
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86 |
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87 /* |
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88 ## Must always report at least 1 cpu available |
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89 %!assert (nproc () >= 1); |
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90 %!assert (nproc ("all") >= 1); |
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91 %!assert (nproc ("current") >= 1); |
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92 |
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93 %!test |
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94 %! c = nproc ("current"); |
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95 %! unwind_protect |
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96 %! old_val = getenv ("OMP_NUM_THREADS"); |
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97 %! new_val = c + 1; |
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98 %! setenv ("OMP_NUM_THREADS", num2str (new_val)); |
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99 %! assert (nproc ("overridable"), new_val); |
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100 %! unwind_protect_cleanup |
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101 %! if (! isempty (old_val)) |
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102 %! setenv ("OMP_NUM_THREADS", old_val); |
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103 %! else |
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104 %! unsetenv ("OMP_NUM_THREADS"); |
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105 %! endif |
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106 %! end_unwind_protect |
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107 |
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108 %!error nproc ("no_valid_option"); |
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109 */ |