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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <list> |
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29 |
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30 #include "oct-time.h" |
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31 #include "file-stat.h" |
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32 |
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33 #include <defaults.h> |
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34 |
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35 #include "defun.h" |
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36 #include "dynamic-ld.h" |
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37 #include "parse.h" |
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38 #include "unwind-prot.h" |
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39 #include "utils.h" |
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40 #include "variables.h" |
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41 |
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42 class |
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43 octave_shlib_list |
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44 { |
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45 public: |
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46 |
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47 static void append (const octave_shlib& shl); |
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48 |
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49 static void remove (octave_shlib& shl); |
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50 |
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51 static void *search (const std::string& fcn_name, octave_shlib& shl, |
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52 octave_shlib::name_mangler mangler = 0); |
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53 |
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54 private: |
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55 |
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56 octave_shlib_list (void) { } |
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57 |
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58 ~octave_shlib_list (void) { } |
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59 |
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60 void do_append (const octave_shlib& shl); |
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61 |
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62 void do_remove (octave_shlib& shl); |
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63 |
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64 void *do_search (const std::string& fcn_name, octave_shlib& shl, |
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65 octave_shlib::name_mangler mangler = 0); |
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66 |
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67 static octave_shlib_list *instance; |
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68 |
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69 static bool instance_ok (void); |
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70 |
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71 // List of libraries we have loaded. |
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72 std::list<octave_shlib> lib_list; |
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73 |
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74 // No copying! |
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75 |
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76 octave_shlib_list (const octave_shlib_list&); |
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77 |
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78 octave_shlib_list& operator = (const octave_shlib_list&); |
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79 }; |
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80 |
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81 octave_shlib_list *octave_shlib_list::instance = 0; |
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82 |
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83 void |
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84 octave_shlib_list::do_append (const octave_shlib& shl) |
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85 { |
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86 lib_list.push_back (shl); |
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87 } |
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88 |
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89 void |
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90 octave_shlib_list::do_remove (octave_shlib& shl) |
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91 { |
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92 |
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93 for (std::list<octave_shlib>::iterator p = lib_list.begin (); |
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94 p != lib_list.end (); |
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95 p++) |
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96 { |
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97 if (*p == shl) |
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98 { |
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99 shl.close (); |
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100 |
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101 lib_list.erase (p); |
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102 |
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103 break; |
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104 } |
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105 } |
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106 } |
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107 |
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108 void * |
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109 octave_shlib_list::do_search (const std::string& fcn_name, octave_shlib& shl, |
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110 octave_shlib::name_mangler mangler) |
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111 { |
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112 void *function = 0; |
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113 |
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114 shl = octave_shlib (); |
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115 |
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116 for (std::list<octave_shlib>::iterator p = lib_list.begin (); |
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117 p != lib_list.end (); |
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118 p++) |
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119 { |
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120 function = p->search (fcn_name, mangler); |
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121 |
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122 if (function) |
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123 { |
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124 shl = *p; |
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125 |
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126 break; |
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127 } |
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128 } |
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129 |
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130 return function; |
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131 } |
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132 |
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133 bool |
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134 octave_shlib_list::instance_ok (void) |
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135 { |
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136 bool retval = true; |
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137 |
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138 if (! instance) |
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139 instance = new octave_shlib_list (); |
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140 |
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141 if (! instance) |
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142 { |
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143 ::error ("unable to create shared library list object!"); |
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144 |
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145 retval = false; |
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146 } |
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147 |
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148 return retval; |
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149 } |
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150 |
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151 void |
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152 octave_shlib_list::append (const octave_shlib& shl) |
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153 { |
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154 if (instance_ok ()) |
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155 instance->do_append (shl); |
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156 } |
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157 |
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158 void |
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159 octave_shlib_list::remove (octave_shlib& shl) |
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160 { |
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161 if (instance_ok ()) |
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162 instance->do_remove (shl); |
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163 } |
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164 |
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165 void * |
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166 octave_shlib_list::search (const std::string& fcn_name, octave_shlib& shl, |
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167 octave_shlib::name_mangler mangler) |
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168 { |
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169 return (instance_ok ()) ? instance->do_search (fcn_name, shl, mangler) : 0; |
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170 } |
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171 |
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172 octave_dynamic_loader *octave_dynamic_loader::instance = 0; |
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173 |
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174 bool octave_dynamic_loader::doing_load = false; |
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175 |
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176 bool |
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177 octave_dynamic_loader::instance_ok (void) |
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178 { |
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179 bool retval = true; |
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180 |
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181 if (! instance) |
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182 instance = new octave_dynamic_loader (); |
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183 |
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184 if (! instance) |
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185 { |
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186 ::error ("unable to create dynamic loader object!"); |
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187 |
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188 retval = false; |
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189 } |
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190 |
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191 return retval; |
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192 } |
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193 |
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194 static |
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195 void do_clear_function (const std::string& fcn_name) |
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196 { |
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197 warning_with_id ("Octave:reload-forces-clear", " %s", fcn_name.c_str ()); |
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198 |
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199 curr_sym_tab->clear (fcn_name); |
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200 |
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201 if (curr_sym_tab != top_level_sym_tab) |
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202 top_level_sym_tab->clear (fcn_name); |
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203 |
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204 fbi_sym_tab->clear (fcn_name); |
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205 } |
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206 |
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207 bool |
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208 octave_dynamic_loader::do_load (const std::string& fcn_name, |
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209 const std::string& file_name) |
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210 { |
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211 bool retval = false; |
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212 |
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213 octave_shlib oct_file; |
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214 |
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215 unwind_protect::begin_frame ("octave_dynamic_loader::do_load"); |
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216 |
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217 unwind_protect_bool (octave_dynamic_loader::doing_load); |
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218 |
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219 doing_load = true; |
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220 |
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221 void *function |
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222 = octave_shlib_list::search (fcn_name, oct_file, mangle_name); |
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223 |
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224 if (! error_state) |
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225 { |
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226 if (function && oct_file.is_out_of_date ()) |
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227 { |
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228 int n = oct_file.number_of_functions_loaded (); |
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229 |
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230 if (n > 0) |
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231 warning_with_id ("Octave:reload-forces-clear", |
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232 "reloading %s clears the following functions:", |
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233 oct_file.file_name().c_str ()); |
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234 |
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235 oct_file.close (do_clear_function); |
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236 |
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237 function = 0; |
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238 } |
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239 |
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240 if (! function) |
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241 { |
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242 std::string oct_file_name |
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243 = file_name.empty () ? oct_file_in_path (fcn_name) : file_name; |
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244 |
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245 if (! oct_file_name.empty ()) |
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246 { |
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247 oct_file.open (oct_file_name); |
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248 |
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249 if (! error_state) |
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250 { |
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251 if (oct_file) |
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252 { |
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253 octave_shlib_list::append (oct_file); |
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254 |
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255 function = oct_file.search (fcn_name, mangle_name); |
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256 } |
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257 else |
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258 ::error ("%s is not a valid shared library", |
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259 oct_file_name.c_str ()); |
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260 } |
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261 } |
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262 } |
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263 } |
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264 |
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265 if (function) |
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266 { |
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267 octave_dld_fcn_installer f |
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268 = FCN_PTR_CAST (octave_dld_fcn_installer, function); |
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269 |
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270 retval = f (oct_file); |
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271 |
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272 if (! retval) |
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273 ::error ("failed to install dld function `%s'", fcn_name.c_str ()); |
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274 } |
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275 |
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276 unwind_protect::run_frame ("octave_dynamic_loader::do_load"); |
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277 |
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278 return retval; |
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279 } |
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280 |
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281 bool |
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282 octave_dynamic_loader::do_remove (const std::string& fcn_name, octave_shlib& shl) |
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283 { |
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284 bool retval = false; |
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285 |
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286 // We don't need to do anything if this is called because we are in |
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287 // the process of reloading a .oct file that has changed. |
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288 |
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289 if (! doing_load) |
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290 { |
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291 retval = shl.remove (fcn_name); |
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292 |
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293 if (shl.number_of_functions_loaded () == 0) |
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294 octave_shlib_list::remove (shl); |
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295 } |
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296 |
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297 return retval; |
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298 } |
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299 |
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300 bool |
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301 octave_dynamic_loader::load (const std::string& fcn_name, |
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302 const std::string& file_name) |
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303 { |
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304 return (instance_ok ()) ? instance->do_load (fcn_name, file_name) : false; |
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305 } |
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306 |
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307 bool |
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308 octave_dynamic_loader::remove (const std::string& fcn_name, octave_shlib& shl) |
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309 { |
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310 return (instance_ok ()) ? instance->do_remove (fcn_name, shl) : false; |
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311 } |
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312 |
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313 #define STRINGIFY(s) STRINGIFY1(s) |
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314 #define STRINGIFY1(s) #s |
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315 |
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316 std::string |
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317 octave_dynamic_loader::mangle_name (const std::string& name) |
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318 { |
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319 #if defined (CXX_PREPENDS_UNDERSCORE) |
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320 std::string retval ("_FS"); |
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321 #else |
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322 std::string retval ("FS"); |
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323 #endif |
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324 retval.append (name); |
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325 retval.append ("_"); |
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326 retval.append (STRINGIFY (CXX_ABI)); |
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327 return retval; |
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328 } |
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329 |
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330 /* |
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331 ;;; Local Variables: *** |
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332 ;;; mode: C++ *** |
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333 ;;; End: *** |
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334 */ |
