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1 /* |
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2 |
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3 Copyright (C) 1999 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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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 #if defined (WITH_SHL) |
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28 #include <cerrno> |
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29 #include <cstring> |
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30 #endif |
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31 |
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32 extern "C" |
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33 { |
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34 #if defined (WITH_DL) |
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35 #if defined (HAVE_DLFCN_H) |
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36 #include <dlfcn.h> |
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37 #else |
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38 extern void *dlopen (const char *, int); |
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39 extern const char *dlerror (void); |
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40 extern void *dlsym (void *, const char *); |
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41 extern int dlclose (void *); |
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42 #endif |
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43 #ifndef RTLD_LAZY |
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44 #define RTLD_LAZY 1 |
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45 #endif |
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46 #elif defined (WITH_SHL) |
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47 #include <dl.h> |
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48 #endif |
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49 } |
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50 |
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51 #include "file-stat.h" |
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52 #include "lo-error.h" |
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53 #include "oct-shlib.h" |
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54 #include "str-vec.h" |
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55 |
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56 class |
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57 octave_base_shlib : public octave_shlib |
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58 { |
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59 public: |
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60 |
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61 octave_base_shlib (void) |
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62 : octave_shlib (octave_xshlib ()), file (), fcn_names (), |
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63 tm_loaded (static_cast<time_t> (0)) |
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64 { count = 1; } |
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65 |
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66 octave_base_shlib (const std::string& f) |
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67 : octave_shlib (octave_xshlib ()), file (f), fcn_names (), |
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68 tm_loaded (static_cast<time_t> (0)) |
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69 { count = 1; } |
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70 |
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71 ~octave_base_shlib (void) { } |
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72 |
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73 void open (const std::string&, bool = false) { } |
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74 |
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75 void *search (const std::string&, name_mangler = 0) { return 0; } |
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76 |
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77 void close (octave_shlib::close_hook = 0) { } |
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78 |
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79 bool remove (const std::string& fcn_name); |
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80 |
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81 bool is_open (void) const { return false; } |
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82 |
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83 bool is_out_of_date (void) const; |
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84 |
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85 int number_of_functions_loaded (void) const { return fcn_names.length (); } |
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86 |
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87 std::string file_name (void) const { return file; } |
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88 |
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89 octave_time time_loaded (void) const { return tm_loaded; } |
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90 |
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91 protected: |
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92 |
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93 std::string file; |
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94 |
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95 string_vector fcn_names; |
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96 |
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97 octave_time tm_loaded; |
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98 |
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99 void stamp_time (bool warn_future = false); |
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100 |
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101 void add_to_fcn_names (const std::string& name); |
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102 |
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103 void do_close_hook (octave_shlib::close_hook = 0); |
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104 |
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105 void tabula_rasa (void); |
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106 |
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107 // No copying! |
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108 |
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109 octave_base_shlib (const octave_base_shlib&); |
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110 |
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111 octave_base_shlib& operator = (const octave_base_shlib&); |
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112 }; |
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113 |
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114 bool |
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115 octave_base_shlib::remove (const std::string& fcn_name) |
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116 { |
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117 bool retval = false; |
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118 |
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119 int n = number_of_functions_loaded (); |
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120 |
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121 string_vector new_fcn_names (n); |
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122 |
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123 int k = 0; |
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124 |
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125 for (int i = 0; i < n; i++) |
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126 { |
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127 if (fcn_names(i) == fcn_name) |
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128 retval = true; |
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129 else |
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130 new_fcn_names(k++) = fcn_names(i); |
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131 } |
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132 |
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133 new_fcn_names.resize (k); |
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134 |
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135 fcn_names = new_fcn_names; |
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136 |
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137 return retval; |
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138 } |
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139 |
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140 bool |
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141 octave_base_shlib::is_out_of_date (void) const |
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142 { |
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143 file_stat fs (file); |
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144 |
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145 return fs.is_newer (tm_loaded); |
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146 } |
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147 |
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148 void |
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149 octave_base_shlib::stamp_time (bool warn_future) |
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150 { |
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151 tm_loaded.stamp (); |
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152 |
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153 if (warn_future) |
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154 { |
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155 file_stat fs (file); |
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156 |
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157 if (fs.is_newer (tm_loaded)) |
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158 (*current_liboctave_warning_handler) |
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159 ("timestamp on file %s is in the future", file.c_str ()); |
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160 } |
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161 } |
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162 |
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163 void |
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164 octave_base_shlib::add_to_fcn_names (const std::string& name) |
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165 { |
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166 int n = number_of_functions_loaded (); |
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167 |
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168 for (int i = 0; i < n; i++) |
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169 if (fcn_names(i) == name) |
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170 return; |
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171 |
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172 fcn_names.resize (n+1); |
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173 |
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174 fcn_names(n) = name; |
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175 } |
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176 |
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177 void |
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178 octave_base_shlib::do_close_hook (octave_shlib::close_hook cl_hook) |
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179 { |
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180 int n = number_of_functions_loaded (); |
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181 |
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182 for (int i = 0; i < n; i++) |
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183 cl_hook (fcn_names(i)); |
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184 } |
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185 |
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186 void |
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187 octave_base_shlib::tabula_rasa (void) |
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188 { |
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189 file = ""; |
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190 |
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191 fcn_names.resize (0); |
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192 |
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193 tm_loaded = static_cast<time_t> (0); |
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194 } |
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195 |
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196 #if defined (WITH_DL) |
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197 |
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198 class |
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199 octave_dlopen_shlib : public octave_base_shlib |
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200 { |
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201 public: |
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202 |
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203 octave_dlopen_shlib (void); |
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204 |
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205 ~octave_dlopen_shlib (void); |
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206 |
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207 void open (const std::string& f, bool warn_future = false); |
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208 |
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209 void *search (const std::string& name, name_mangler mangler = 0); |
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210 |
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211 void close (octave_shlib::close_hook cl_hook = 0); |
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212 |
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213 bool is_open (void) const { return (library != 0); } |
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214 |
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215 private: |
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216 |
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217 // No copying! |
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218 |
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219 octave_dlopen_shlib (const octave_dlopen_shlib&); |
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220 |
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221 octave_dlopen_shlib& operator = (const octave_dlopen_shlib&); |
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222 |
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223 void *library; |
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224 }; |
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225 |
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226 octave_dlopen_shlib::octave_dlopen_shlib (void) |
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227 : octave_base_shlib (), library (0) |
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228 { |
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229 } |
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230 |
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231 octave_dlopen_shlib::~octave_dlopen_shlib (void) |
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232 { |
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233 close (); |
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234 } |
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235 |
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236 void |
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237 octave_dlopen_shlib::open (const std::string& f, bool warn_future) |
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238 { |
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239 if (! is_open ()) |
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240 { |
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241 file = f; |
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242 |
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243 library = dlopen (file.c_str (), RTLD_LAZY); |
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244 |
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245 if (library) |
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246 stamp_time (warn_future); |
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247 else |
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248 { |
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249 const char *msg = dlerror (); |
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250 |
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251 if (msg) |
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252 (*current_liboctave_error_handler) ("%s", msg); |
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253 } |
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254 } |
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255 else |
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256 (*current_liboctave_error_handler) |
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257 ("shared library %s is already open", file.c_str ()); |
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258 } |
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259 |
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260 void * |
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261 octave_dlopen_shlib::search (const std::string& name, |
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262 octave_shlib::name_mangler mangler) |
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263 { |
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264 void *function = 0; |
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265 |
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266 if (is_open ()) |
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267 { |
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268 std::string sym_name = name; |
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269 |
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270 if (mangler) |
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271 sym_name = mangler (name); |
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272 |
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273 function = dlsym (library, sym_name.c_str ()); |
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274 |
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275 if (function) |
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276 add_to_fcn_names (name); |
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277 } |
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278 else |
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279 (*current_liboctave_error_handler) |
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280 ("shared library %s is not open", file.c_str ()); |
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281 |
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282 return function; |
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283 } |
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284 |
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285 void |
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286 octave_dlopen_shlib::close (octave_shlib::close_hook cl_hook) |
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287 { |
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288 if (is_open ()) |
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289 { |
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290 do_close_hook (cl_hook); |
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291 |
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292 dlclose (library); |
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293 |
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294 library = 0; |
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295 |
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296 tabula_rasa (); |
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297 } |
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298 } |
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299 |
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300 #elif defined (WITH_SHL) |
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301 |
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302 class |
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303 octave_shl_load_shlib : public octave_base_shlib |
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304 { |
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305 public: |
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306 |
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307 octave_shl_load_shlib (void); |
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308 |
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309 ~octave_shl_load_shlib (void); |
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310 |
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311 void open (const std::string& f, bool warn_future = false); |
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312 |
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313 void *search (const std::string& name, name_mangler mangler = 0); |
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314 |
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315 void close (octave_shlib::close_hook cl_hook = 0); |
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316 |
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317 bool is_open (void) const { return (library != 0); } |
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318 |
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319 private: |
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320 |
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321 // No copying! |
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322 |
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323 octave_shl_load_shlib (const octave_shl_load_shlib&); |
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324 |
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325 octave_shl_load_shlib& operator = (const octave_shl_load_shlib&); |
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326 |
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327 shl_t library; |
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328 }; |
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329 |
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330 octave_shl_load_shlib::octave_shl_load_shlib (void) |
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331 : octave_base_shlib (), library (0) |
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332 { |
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333 } |
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334 |
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335 octave_shl_load_shlib::~octave_shl_load_shlib (void) |
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336 { |
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337 close (); |
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338 } |
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339 |
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340 void |
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341 octave_shl_load_shlib::open (const std::string& f, bool warn_future) |
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342 { |
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343 if (! is_open ()) |
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344 { |
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345 file = f; |
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346 |
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347 library = shl_load (file.c_str (), BIND_DEFERRED, 0L); |
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348 |
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349 if (library) |
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350 stamp_time (warn_future); |
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351 else |
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352 { |
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353 using namespace std; |
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354 (*current_liboctave_error_handler) ("%s", strerror (errno)); |
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355 } |
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356 } |
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357 else |
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358 (*current_liboctave_error_handler) |
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359 ("shared library %s is already open", file.c_str ()); |
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360 } |
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361 |
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362 void * |
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363 octave_shl_load_shlib::search (const std::string& name, |
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364 octave_shlib::name_mangler mangler) |
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365 { |
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366 void *function = 0; |
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367 |
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368 if (is_open ()) |
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369 { |
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370 std::string sym_name = name; |
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371 |
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372 if (mangler) |
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373 sym_name = mangler (name); |
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374 |
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375 int status = shl_findsym (&library, sym_name.c_str (), |
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376 TYPE_UNDEFINED, &function); |
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377 |
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378 if (status == 0) |
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379 add_to_fcn_names (name); |
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380 } |
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381 else |
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382 (*current_liboctave_error_handler) |
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383 ("shared library %s is not open", file.c_str ()); |
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384 |
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385 return function; |
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386 } |
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387 |
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388 void |
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389 octave_shl_load_shlib::close (octave_shlib::close_hook cl_hook) |
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390 { |
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391 if (is_open ()) |
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392 { |
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393 do_close_hook (cl_hook); |
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394 |
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395 shl_unload (library); |
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396 |
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397 library = 0; |
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398 |
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399 tabula_rasa (); |
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400 } |
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401 } |
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402 |
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403 #endif |
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404 |
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405 octave_shlib * |
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406 octave_shlib::make_shlib (void) |
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407 { |
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408 #if defined (WITH_DL) |
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409 return new octave_dlopen_shlib (); |
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410 #elif defined (WITH_SHL) |
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411 return new octave_shl_load_shlib (); |
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412 #else |
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413 return new octave_base_shlib (); |
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414 #endif |
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415 } |
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416 |
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417 /* |
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418 ;;; Local Variables: *** |
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419 ;;; mode: C++ *** |
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420 ;;; End: *** |
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421 */ |
