Mercurial > octave
annotate liboctave/util/oct-refcount.h @ 21229:a83e7a384ee0
create and install a subset of config.h in octave-config.h
* mk-octave-config-h.sh: New file.
* Makefile.am (EXTRA_DIST): Add mk-octave-config.h.sh to the list.
(octinclude_HEADERS): Add octave-config.h to the list.
(octave-config.h): New rule.
* common.mk (do_subst_config_vals, do_subst_cross_config_vals):
Don't substitute unused ENABLE options.
* configure.ac: Note the reason for using oct-conf-post.in.h.
Add OCTAVE_ prefix to ENABLE_BOUNDS_CHECK ENABLE_ATOMIC_REFCOUNT,
ENABLE_64, ENABLE_OPENMP, and ENABLE_FLOAT_TRUNCATE in calls to
AC_DEFINE. Change all uses.
* oct-conf-post.in.h: Define HAVE_OCTAVE_DEPRECATED_ATTR instead of
HAVE_ATTR_DEPRECATED. Likewise for HAVE_ATTR_NORETURN and
HAVE_ATTR_UNUSED. Change all uses.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 08 Feb 2016 17:30:29 -0500 |
parents | f7121e111991 |
children | 7af5ca01ecac |
rev | line source |
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1 /* |
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2 |
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3 Copyright (C) 2012-2015 Jaroslav Hajek |
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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 #if ! defined (octave_oct_refcount_h) |
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24 #define octave_oct_refcount_h 1 |
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25 |
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26 #ifndef OCTAVE_CONFIG_INCLUDED |
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27 # error "The file <octave/config.h> must be included before oct-refcount.h." |
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28 #endif |
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29 |
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30 #if defined (OCTAVE_ENABLE_ATOMIC_REFCOUNT) && (defined (_MSC_VER) || defined (__GNUC__)) |
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31 # if defined (_MSC_VER) |
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32 # include <intrin.h> |
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33 # define OCTREFCOUNT_ATOMIC_INCREMENT(x) _InterlockedIncrement((long*)x) |
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34 # define OCTREFCOUNT_ATOMIC_DECREMENT(x) _InterlockedDecrement((long*)x) |
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35 # define OCTREFCOUNT_ATOMIC_INCREMENT_POST(x) _InterlockedExchangeAdd((long*)x, 1) |
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36 # define OCTREFCOUNT_ATOMIC_DECREMENT_POST(x) _InterlockedExchangeAdd((long*)x, -1) |
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37 # elif defined (__GNUC__) |
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38 # define OCTREFCOUNT_ATOMIC_INCREMENT(x) __sync_add_and_fetch(x, 1) |
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39 # define OCTREFCOUNT_ATOMIC_DECREMENT(x) __sync_add_and_fetch(x, -1) |
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40 # define OCTREFCOUNT_ATOMIC_INCREMENT_POST(x) __sync_fetch_and_add(x, 1) |
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41 # define OCTREFCOUNT_ATOMIC_DECREMENT_POST(x) __sync_fetch_and_add(x, -1) |
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42 # endif |
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43 #else |
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44 // Generic non-locking versions |
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45 # define OCTREFCOUNT_ATOMIC_INCREMENT(x) ++(*(x)) |
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46 # define OCTREFCOUNT_ATOMIC_DECREMENT(x) --(*(x)) |
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47 # define OCTREFCOUNT_ATOMIC_INCREMENT_POST(x) (*(x))++ |
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48 # define OCTREFCOUNT_ATOMIC_DECREMENT_POST(x) (*(x))-- |
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49 #endif |
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50 |
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51 // Encapsulates a reference counter. |
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52 template <typename T> |
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53 class octave_refcount |
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54 { |
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55 public: |
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56 typedef T count_type; |
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57 |
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58 octave_refcount(count_type initial_count) : count(initial_count) { } |
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59 |
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60 // Increment/Decrement. int is postfix. |
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62 { |
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63 return OCTREFCOUNT_ATOMIC_INCREMENT (&count); |
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64 } |
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65 |
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67 { |
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68 return OCTREFCOUNT_ATOMIC_INCREMENT_POST (&count); |
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69 } |
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70 |
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71 count_type operator--(void) |
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72 { |
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73 return OCTREFCOUNT_ATOMIC_DECREMENT (&count); |
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74 } |
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75 |
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76 count_type operator--(int) |
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77 { |
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78 return OCTREFCOUNT_ATOMIC_DECREMENT_POST (&count); |
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79 } |
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80 |
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81 operator count_type (void) const |
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82 { |
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83 return static_cast<count_type const volatile&> (count); |
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84 } |
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85 |
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86 count_type *get (void) |
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87 { |
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88 return &count; |
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89 } |
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90 |
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91 private: |
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92 count_type count; |
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93 }; |
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94 |
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95 #endif |