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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, 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 #include <strstream.h> |
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33 |
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34 extern "C" |
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35 { |
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36 #if defined (WITH_DL) |
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37 #include <dlfcn.h> |
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38 #ifndef RTLD_LAZY |
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39 #define RTLD_LAZY 1 |
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40 #endif |
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41 #elif defined (WITH_SHL) |
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42 #include <dl.h> |
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43 #endif |
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44 } |
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45 |
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46 #include <defaults.h> |
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47 #include "dirfns.h" |
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48 #include "dynamic-ld.h" |
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49 #include "error.h" |
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50 #include "toplev.h" |
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51 #include "pathsearch.h" |
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52 #include "oct-obj.h" |
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53 #include "oct-builtin.h" |
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54 #include "ov.h" |
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55 #include "utils.h" |
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56 #include "variables.h" |
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57 |
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58 #if defined (WITH_DL) |
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59 |
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60 class |
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61 octave_dlopen_dynamic_loader : public octave_dynamic_loader |
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62 { |
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63 public: |
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64 |
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65 octave_dlopen_dynamic_loader (void) |
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66 : octave_dynamic_loader () { } |
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67 |
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68 ~octave_dlopen_dynamic_loader (void) { } |
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69 |
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70 private: |
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71 |
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72 octave_dynamic_loader::builtin_fcn |
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73 resolve_reference (const string& mangled_name, const string& file); |
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74 |
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75 // No copying! |
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76 |
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77 octave_dlopen_dynamic_loader (const octave_dlopen_dynamic_loader&); |
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78 |
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79 octave_dlopen_dynamic_loader& |
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80 operator = (const octave_dlopen_dynamic_loader&); |
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81 }; |
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82 |
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83 octave_dynamic_loader::builtin_fcn |
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84 octave_dlopen_dynamic_loader::resolve_reference (const string& name, |
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85 const string& file) |
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86 { |
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87 octave_dynamic_loader::builtin_fcn retval = 0; |
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88 |
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89 // Dynamic linking with dlopen/dlsym doesn't require specification |
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90 // of the libraries at runtime. Instead, they are specified when |
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91 // the .oct file is created. |
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92 |
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93 void *handle = dlopen (file.c_str (), RTLD_LAZY); |
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94 |
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95 const char *nm = name.c_str (); |
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96 |
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97 if (handle) |
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98 { |
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99 retval = (octave_dynamic_loader::builtin_fcn) dlsym (handle, nm); |
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100 |
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101 if (! retval) |
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102 { |
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103 const char *errmsg = dlerror (); |
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104 |
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105 if (errmsg) |
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106 error("%s: `%s'", nm, errmsg); |
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107 else |
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108 error("unable to link function `%s'", nm); |
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109 |
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110 dlclose (handle); |
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111 } |
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112 } |
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113 else |
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114 error ("%s: %s `%s'", dlerror (), file.c_str (), nm); |
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115 |
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116 return retval; |
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117 } |
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118 |
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119 #elif defined (WITH_SHL) |
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120 |
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121 class |
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122 octave_shl_load_dynamic_loader : public octave_dynamic_loader |
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123 { |
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124 public: |
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125 |
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126 octave_shl_load_dynamic_loader (void) |
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127 : octave_dynamic_loader () { } |
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128 |
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129 ~octave_shl_load_dynamic_loader (void) { } |
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130 |
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131 private: |
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132 |
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133 octave_dynamic_loader::builtin_fcn |
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134 resolve_reference (const string& mangled_name, const string& file); |
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135 |
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136 // No copying! |
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137 |
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138 octave_shl_load_dynamic_loader (const octave_shl_load_dynamic_loader&); |
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139 |
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140 octave_shl_load_dynamic_loader& |
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141 operator = (const octave_shl_load_dynamic_loader&); |
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142 }; |
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143 |
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144 octave_dynamic_loader::builtin_fcn |
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145 octave_shl_load_dynamic_loader::resolve_reference (const string& name, |
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146 const string& file) |
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147 { |
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148 octave_dynamic_loader::builtin_fcn retval = 0; |
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149 |
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150 // Dynamic linking with shl_load/shl_findsym doesn't require |
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151 // specification of the libraries at runtime. Instead, they are |
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152 // specified when the .oct file is created. |
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153 |
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154 shl_t handle = shl_load (file.c_str (), BIND_DEFERRED, 0L); |
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155 |
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156 const char *nm = name.c_str (); |
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157 |
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158 if (handle) |
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159 { |
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160 int status = shl_findsym (&handle, nm, TYPE_UNDEFINED, retval); |
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161 |
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162 if (status < 0) |
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163 { |
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164 const char *errmsg = strerror (errno); |
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165 |
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166 if (errmsg) |
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167 error("%s: `%s'", nm, errmsg); |
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168 else |
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169 error("unable to link function `%s'", nm); |
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170 |
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171 retval = 0; |
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172 } |
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173 } |
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174 else |
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175 error ("%s: %s `%s'", strerror (errno), file.c_str (), nm); |
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176 |
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177 return retval; |
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178 } |
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179 |
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180 #endif |
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181 |
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182 static octave_dynamic_loader * |
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183 make_dynamic_loader (void) |
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184 { |
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185 #if defined (WITH_DL) |
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186 return new octave_dlopen_dynamic_loader (); |
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187 #elif defined (WITH_SHL) |
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188 return new octave_sh_load_dynamic_loader (); |
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189 #else |
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190 return new octave_dynamic_loader (); |
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191 #endif |
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192 } |
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193 |
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194 octave_dynamic_loader *octave_dynamic_loader::instance = 0; |
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195 |
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196 octave_dynamic_loader::octave_dynamic_loader (void) |
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197 { |
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198 } |
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199 |
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200 octave_dynamic_loader::~octave_dynamic_loader (void) |
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201 { |
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202 } |
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203 |
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204 int |
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205 octave_dynamic_loader::load_fcn_from_dot_oct_file (const string& fcn_name) |
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206 { |
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207 if (! instance) |
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208 instance = make_dynamic_loader (); |
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209 |
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210 int retval = 0; |
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211 |
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212 string oct_file = oct_file_in_path (fcn_name); |
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213 |
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214 if (! oct_file.empty ()) |
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215 { |
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216 string mangled_name = instance->mangle_name (fcn_name); |
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217 |
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218 builtin_fcn f = instance->resolve_reference (mangled_name, oct_file); |
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219 |
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220 if (f) |
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221 { |
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222 octave_builtin *obj = f (); |
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223 |
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224 if (obj) |
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225 { |
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226 install_builtin_function (obj); |
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227 retval = 1; |
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228 } |
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229 } |
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230 } |
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231 |
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232 return retval; |
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233 } |
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234 |
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235 octave_dynamic_loader::builtin_fcn |
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236 octave_dynamic_loader::resolve_reference (const string&, const string&) |
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237 { |
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238 return 0; |
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239 } |
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240 |
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241 string |
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242 octave_dynamic_loader::mangle_name (const string& name) |
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243 { |
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244 string retval ("FS"); |
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245 retval.append (name); |
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246 retval.append ("__Fv"); |
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247 return retval; |
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248 } |
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249 |
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250 /* |
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251 ;;; Local Variables: *** |
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252 ;;; mode: C++ *** |
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253 ;;; End: *** |
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254 */ |
