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maint: Merge stable to default.
author Markus Mützel <markus.muetzel@gmx.de>
date Tue, 28 May 2024 15:25:54 +0200
parents 4b601ca024d5
children
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1999-2024 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_oct_shlib_h)
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27 #define octave_oct_shlib_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <functional>
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32 #include <list>
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33 #include <map>
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34 #include <string>
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35
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36 #include "oct-time.h"
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37 #include "oct-refcount.h"
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38
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39 OCTAVE_BEGIN_NAMESPACE(octave)
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40
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41 class dynamic_library
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42 {
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43 public: // FIXME: make this class private?
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44
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45 typedef std::function<std::string (const std::string&)> name_mangler;
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46
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47 class dynlib_rep
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48 {
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49 public:
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50
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51 dynlib_rep ()
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52 : m_count (1), m_fcn_names (), m_file (), m_time_loaded (OCTAVE_TIME_T ()),
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53 m_search_all_loaded (false)
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54 { }
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55
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56 OCTAVE_DISABLE_COPY_MOVE (dynlib_rep)
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57
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58 protected:
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59
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60 OCTAVE_API
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61 dynlib_rep (const std::string& f);
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62
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63 public:
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64
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65 virtual ~dynlib_rep ()
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66 {
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67 s_instances.erase (m_file);
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68 }
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69
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70 virtual bool is_open () const
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71 { return false; }
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72
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73 virtual void * search (const std::string&,
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74 const name_mangler& = name_mangler ())
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75 { return nullptr; }
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76
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77 OCTAVE_API bool is_out_of_date () const;
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78
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79 // This method will be overridden conditionally.
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80 static OCTAVE_API dynlib_rep * new_instance (const std::string& f);
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81
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82 static OCTAVE_API dynlib_rep * get_instance (const std::string& f, bool fake);
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83
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84 sys::time time_loaded () const
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85 { return m_time_loaded; }
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86
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87 std::string file_name () const
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88 { return m_file; }
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89
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90 std::size_t num_fcn_names () const { return m_fcn_names.size (); }
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91
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92 OCTAVE_API std::list<std::string> function_names () const;
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93
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94 OCTAVE_API void add_fcn_name (const std::string&);
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95
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96 OCTAVE_API bool remove_fcn_name (const std::string&);
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97
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98 void clear_fcn_names () { m_fcn_names.clear (); }
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99
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100 public:
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101
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102 refcount<octave_idx_type> m_count;
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103
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104 protected:
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105
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106 OCTAVE_API void fake_reload ();
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107
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108 static OCTAVE_API std::map<std::string, dynlib_rep *> s_instances;
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109
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110 // Set of hooked function names.
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111 typedef std::map<std::string, std::size_t>::iterator fcn_names_iterator;
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112 typedef std::map<std::string, std::size_t>::const_iterator fcn_names_const_iterator;
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113
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114 std::map<std::string, std::size_t> m_fcn_names;
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115 std::string m_file;
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116 sys::time m_time_loaded;
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117 bool m_search_all_loaded;
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118 };
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119
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120 private:
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121
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122 static OCTAVE_API dynlib_rep s_nil_rep;
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123
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124 public:
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125
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126 dynamic_library () : m_rep (&s_nil_rep) { m_rep->m_count++; }
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127
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128 dynamic_library (const std::string& f, bool fake = true)
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129 : m_rep (dynlib_rep::get_instance (f, fake)) { }
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130
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131 ~dynamic_library ()
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132 {
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133 if (--m_rep->m_count == 0 && m_rep != &s_nil_rep)
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134 delete m_rep;
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135 }
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136
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137 OCTAVE_API void delete_later ();
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138
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139 dynamic_library (const dynamic_library& sl)
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140 : m_rep (sl.m_rep)
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141 {
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142 m_rep->m_count++;
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143 }
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144
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145 dynamic_library& operator = (const dynamic_library& sl)
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146 {
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147 if (m_rep != sl.m_rep)
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148 {
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149 if (--m_rep->m_count == 0 && m_rep != &s_nil_rep)
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150 delete m_rep;
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151
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152 m_rep = sl.m_rep;
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153 m_rep->m_count++;
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154 }
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155
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156 return *this;
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157 }
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158
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159 bool operator == (const dynamic_library& sl) const
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160 { return (m_rep == sl.m_rep); }
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161
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162 operator bool () const { return m_rep->is_open (); }
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163
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164 void open (const std::string& f)
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165 { *this = dynamic_library (f); }
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166
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167 std::list<std::string> close ()
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168 {
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169 std::list<std::string> removed_fcns = m_rep->function_names ();
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170
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171 m_rep->clear_fcn_names ();
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172
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173 *this = dynamic_library ();
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174
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175 return removed_fcns;
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176 }
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177
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178 void * search (const std::string& nm,
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179 const name_mangler& mangler = name_mangler ()) const
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180 {
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181 void *f = m_rep->search (nm, mangler);
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182 if (f)
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183 m_rep->add_fcn_name (nm);
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184
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185 return f;
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186 }
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187
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188 void add (const std::string& name)
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189 { m_rep->add_fcn_name (name); }
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190
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191 bool remove (const std::string& name)
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192 { return m_rep->remove_fcn_name (name); }
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193
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194 std::size_t number_of_functions_loaded () const
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195 { return m_rep->num_fcn_names (); }
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196
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197 bool is_out_of_date () const
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198 { return m_rep->is_out_of_date (); }
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199
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200 std::string file_name () const
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201 { return m_rep->file_name (); }
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202
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203 sys::time time_loaded () const
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204 { return m_rep->time_loaded (); }
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205
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206 private:
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207
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208 dynlib_rep *m_rep;
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209 };
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210
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211 // FIXME: Currently must return int so that it may be used as an
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212 // event_hook function.
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213
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214 OCTAVE_API int release_unreferenced_dynamic_libraries ();
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215
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216 OCTAVE_END_NAMESPACE(octave)
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c19f4b9484af [project @ 1999-10-29 21:52:12 by jwe]
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217
c19f4b9484af [project @ 1999-10-29 21:52:12 by jwe]
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218 #endif