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1 // dynamic-ld.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1993 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef __GNUG__ |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 extern "C" |
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29 { |
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30 #include "dld.h" |
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31 } |
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32 |
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33 #include "dynamic-ld.h" |
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34 #include "tree-const.h" |
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35 #include "user-prefs.h" |
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36 #include "octave.h" |
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37 #include "utils.h" |
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38 #include "error.h" |
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39 |
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40 void |
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41 octave_dld_tc2_unlink_by_symbol (char *name, int hard = 1) |
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42 { |
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43 char *mangled_fcn_name = strconcat (name, "__FP13tree_constantii"); |
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44 int status = dld_unlink_by_symbol (mangled_fcn_name, hard); |
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45 if (status != 0) |
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46 dld_perror ("octave_dld_tc2_unlink_by_symbol"); |
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47 delete [] mangled_fcn_name; |
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48 } |
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49 |
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50 void |
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51 octave_dld_tc2_unlink_by_file (char *name, int hard = 1) |
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52 { |
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53 int status = dld_unlink_by_file (name, hard); |
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54 if (status != 0) |
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55 dld_perror ("octave_dld_tc2_unlink_by_file"); |
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56 } |
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57 |
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58 static void |
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59 octave_dld_init (void) |
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60 { |
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61 static int initialized = 0; |
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62 |
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63 if (! initialized) |
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64 { |
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65 char *full_path = dld_find_executable (raw_prog_name); |
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66 if (full_path != (char *) NULL) |
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67 { |
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68 int status = dld_init (full_path); |
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69 if (status != 0) |
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70 { |
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71 dld_perror ("octave_dld_tc2_and_go"); |
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72 error ("failed to load symbols from `%s'", full_path); |
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73 } |
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74 else |
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75 initialized = 1; |
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76 } |
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77 else |
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78 error ("octave_dld_tc2_and_go: can't find full path to `%s'", |
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79 prog_name); |
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80 } |
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81 } |
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82 |
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83 /* |
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84 * Look for object in path. It should provide a definition for the |
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85 * function we just marked as undefined. If we find it, we\'ll also |
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86 * try to load the remaining undefined symbols. |
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87 */ |
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88 static int |
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89 octave_dld_link (char *object) |
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90 { |
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91 char *file = file_in_path (object, (char *) NULL); |
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92 int status = dld_link (file); |
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93 if (status != 0) |
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94 dld_perror ("octave_dld_link"); |
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95 |
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96 delete [] file; |
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97 return status; |
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98 } |
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99 |
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100 int |
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101 octave_dld_tc2_link (char *object) |
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102 { |
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103 int status = octave_dld_link (object); |
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104 if (status == 0) |
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105 { |
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106 status = octave_dld_link ("liboctave.a"); |
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107 if (status == 0) |
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108 octave_dld_link ("libcruft.a"); |
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109 } |
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110 return status; |
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111 } |
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112 |
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113 builtin_fcn_ptr |
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114 octave_dld_tc2 (char *name, char *fcn, char *object) |
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115 { |
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116 builtin_fcn_ptr retval = (builtin_fcn_ptr) NULL; |
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117 |
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118 octave_dld_init (); |
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119 |
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120 char *mangled_fcn_name = strconcat (fcn, "__FP13tree_constantii"); |
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121 |
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122 // See if the function has already been loaded. If not, mark it as |
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123 // undefined. |
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124 |
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125 if (dld_get_func (mangled_fcn_name) == 0) |
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126 dld_create_reference (mangled_fcn_name); |
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127 |
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128 int status = octave_dld_link (object); |
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129 if (status == 0) |
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130 { |
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131 // Return a pointer to the function we just loaded. If we can\'t find |
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132 // it, this will return NULL. |
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133 |
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134 retval = (builtin_fcn_ptr) dld_get_func (mangled_fcn_name); |
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135 } |
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136 |
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137 delete [] mangled_fcn_name; |
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138 |
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139 return retval; |
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140 |
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141 } |
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142 |
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143 tree_constant * |
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144 octave_dld_tc2_and_go (tree_constant *args, int nargin, int nargout, |
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145 char *name, char *fcn, char *object) |
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146 { |
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147 tree_constant *retval = NULL_TREE_CONST; |
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148 |
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149 builtin_fcn_ptr fcn_to_call = octave_dld_tc2 (name, fcn, object); |
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150 |
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151 if (fcn_to_call != (builtin_fcn_ptr) NULL) |
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152 retval = (*fcn_to_call) (args, nargin, nargout); |
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153 else |
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154 error ("octave_dld_tc2_and_go: failed to load `%s'", name); |
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155 |
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156 return retval; |
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157 } |
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158 |
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159 /* |
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160 ;;; Local Variables: *** |
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161 ;;; mode: C++ *** |
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162 ;;; page-delimiter: "^/\\*" *** |
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163 ;;; End: *** |
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164 */ |
