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annotate liboctave/util/oct-shlib.h @ 21730:30c53770f47e

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use namespace for system time classes * oct-time.h, oct-time.cc: Put time classes in octave::sys namespace. Change all uses. (octave_time, octave_base_tm, octave_localtime, octave_gmtime, octave_strptime): Now deprecated typedefs for corresponding classes in octave::sys namespace.
author John W. Eaton <jwe@octave.org>
date Wed, 18 May 2016 15:23:05 -0400
parents 1473547f50f5
children 6720e5a220ba
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1 /*
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2
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3 Copyright (C) 1999-2015 John W. Eaton
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4 Copyright (C) 2009 VZLU Prague
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
c19f4b9484af [project @ 1999-10-29 21:52:12 by jwe]
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
c19f4b9484af [project @ 1999-10-29 21:52:12 by jwe]
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22 */
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23
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24 #if ! defined (octave_oct_shlib_h)
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25 #define octave_oct_shlib_h 1
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26
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27 #include "octave-config.h"
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28
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29 #include <string>
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30 #include <map>
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31
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32 #include "oct-time.h"
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33 #include "oct-refcount.h"
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34
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35 class
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36 OCTAVE_API
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37 octave_shlib
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38 {
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39 public: // FIXME: make this class private?
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41 typedef std::string (*name_mangler) (const std::string&);
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42 typedef void (*close_hook) (const std::string&);
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43
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44 class shlib_rep
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45 {
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46 public:
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47
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48 shlib_rep (void)
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49 : count (1), file (), tm_loaded (time_t ()), fcn_names () { }
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51 protected:
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52
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53 shlib_rep (const std::string& f);
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55 public:
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56
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57 virtual ~shlib_rep (void)
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58 {
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59 instances.erase (file);
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60 }
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61
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62 virtual bool is_open (void) const
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63 { return false; }
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64
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65 virtual void *search (const std::string&, name_mangler = 0)
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66 { return 0; }
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67
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68 bool is_out_of_date (void) const;
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69
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70 // This method will be overridden conditionally.
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71 static shlib_rep *new_instance (const std::string& f);
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72
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73 static shlib_rep *get_instance (const std::string& f, bool fake);
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74
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75 octave::sys::time time_loaded (void) const
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76 { return tm_loaded; }
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77
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78 std::string file_name (void) const
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79 { return file; }
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81 size_t num_fcn_names (void) const { return fcn_names.size (); }
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83 void add_fcn_name (const std::string&);
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84
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85 bool remove_fcn_name (const std::string&);
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86
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87 void do_close_hook (close_hook cl_hook);
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88
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89 public:
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90
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91 octave_refcount<int> count;
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92
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93 protected:
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94
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95 void fake_reload (void);
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96
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97 std::string file;
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98 octave::sys::time tm_loaded;
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99
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100 // Set of hooked function names.
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101 typedef std::map<std::string, size_t>::iterator fcn_names_iterator;
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102 typedef std::map<std::string, size_t>::const_iterator fcn_names_const_iterator;
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103
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104 std::map<std::string, size_t> fcn_names;
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105
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106 static std::map<std::string, shlib_rep *> instances;
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107 };
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108
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109 private:
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110
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111 static shlib_rep nil_rep;
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112
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113 public:
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115 octave_shlib (void) : rep (&nil_rep) { rep->count++; }
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116
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117 octave_shlib (const std::string& f, bool fake = true)
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118 : rep (shlib_rep::get_instance (f, fake)) { }
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119
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120 ~octave_shlib (void)
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121 {
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122 if (--rep->count == 0)
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123 delete rep;
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124 }
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126 octave_shlib (const octave_shlib& sl)
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127 : rep (sl.rep)
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128 {
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129 rep->count++;
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130 }
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132 octave_shlib& operator = (const octave_shlib& sl)
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133 {
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134 if (rep != sl.rep)
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135 {
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136 if (--rep->count == 0)
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137 delete rep;
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138
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139 rep = sl.rep;
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140 rep->count++;
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141 }
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142
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143 return *this;
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144 }
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145
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146 bool operator == (const octave_shlib& sl) const
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147 { return (rep == sl.rep); }
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148
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149 operator bool () const { return rep->is_open (); }
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150
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151 void open (const std::string& f)
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152 { *this = octave_shlib (f); }
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153
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154 void close (close_hook cl_hook = 0)
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155 {
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156 if (cl_hook)
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157 rep->do_close_hook (cl_hook);
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158
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159 *this = octave_shlib ();
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160 }
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161
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162 void *search (const std::string& nm, name_mangler mangler = 0) const
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163 {
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164 void *f = rep->search (nm, mangler);
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165 if (f)
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166 rep->add_fcn_name (nm);
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167
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168 return f;
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169 }
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170
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171 void add (const std::string& name)
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172 { rep->add_fcn_name (name); }
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173
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174 bool remove (const std::string& name)
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175 { return rep->remove_fcn_name (name); }
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176
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177 size_t number_of_functions_loaded (void) const
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178 { return rep->num_fcn_names (); }
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179
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180 bool is_out_of_date (void) const
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181 { return rep->is_out_of_date (); }
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182
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183 std::string file_name (void) const
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184 { return rep->file_name (); }
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185
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186 octave::sys::time time_loaded (void) const
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187 { return rep->time_loaded (); }
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188
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189 private:
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190
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191 shlib_rep *rep;
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192 };
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193
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194 #endif