1 | //plugincontainer.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | #define MAX_PLUGINS 64 |
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39 | |
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40 | #define OPT_AUTOAPPSCHED 0x0001 |
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41 | |
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42 | struct roar_plugincontainer { |
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43 | size_t refc; |
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44 | const struct roar_plugincontainer_callbacks * callbacks; |
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45 | void * userdata; |
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46 | unsigned int options; |
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47 | struct roar_dl_librarypara * default_para; |
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48 | struct roar_dl_lhandle * handle[MAX_PLUGINS]; |
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49 | size_t deprefc[MAX_PLUGINS]; |
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50 | void * context[MAX_PLUGINS]; |
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51 | size_t numhandles; |
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52 | }; |
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53 | |
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54 | static inline void _unload(struct roar_plugincontainer * cont, size_t index) { |
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55 | int err = roar_error; |
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56 | |
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57 | if ( cont->options & OPT_AUTOAPPSCHED ) |
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58 | roar_dl_appsched_trigger(cont->handle[index], ROAR_DL_APPSCHED_FREE); |
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59 | |
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60 | if ( cont->callbacks != NULL && cont->callbacks->preunload != NULL ) |
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61 | cont->callbacks->preunload(cont, &(cont->context[index]), cont->handle[index]); |
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62 | |
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63 | roar_err_set(err); |
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64 | roar_dl_unref(cont->handle[index]); |
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65 | err = roar_error; |
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66 | cont->handle[index] = NULL; |
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67 | cont->numhandles--; |
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68 | |
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69 | if ( cont->callbacks != NULL && cont->callbacks->postunload != NULL ) |
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70 | cont->callbacks->postunload(cont, &(cont->context[index])); |
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71 | |
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72 | if ( cont->context[index] != NULL ) |
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73 | if ( cont->callbacks != NULL && cont->callbacks->freecontext != NULL ) |
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74 | cont->callbacks->freecontext(cont, &(cont->context[index])); |
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75 | |
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76 | if ( cont->context[index] != NULL ) { |
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77 | roar_mm_free(cont->context[index]); |
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78 | cont->context[index] = NULL; |
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79 | } |
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80 | |
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81 | roar_err_set(err); |
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82 | } |
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83 | |
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84 | static int _loader(struct roar_dl_librarypara * lhandle, void * loader_userdata, enum roar_dl_loadercmd cmd, void * argp) { |
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85 | roar_err_set(ROAR_ERROR_NOSYS); |
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86 | return -1; |
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87 | } |
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88 | |
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89 | static inline void _copy_str(char ** dst, const char * src) { |
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90 | for (; *src; src++, (*dst)++) **dst = *src; |
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91 | *((*dst)++) = 0; |
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92 | } |
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93 | |
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94 | static void * _copy_kv(struct roar_keyval ** copy, struct roar_keyval * src, size_t len) { |
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95 | size_t buflen = 0; |
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96 | size_t i; |
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97 | void * ret; |
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98 | char * p; |
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99 | struct roar_keyval * c; |
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100 | |
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101 | for (i = 0; i < len; i++) { |
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102 | if ( src[i].key != NULL ) |
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103 | buflen += roar_mm_strlen(src[i].key) + 1; |
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104 | if ( src[i].value != NULL ) |
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105 | buflen += roar_mm_strlen(src[i].value) + 1; |
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106 | } |
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107 | |
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108 | c = roar_mm_malloc(len * sizeof(struct roar_keyval)); |
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109 | if ( c == NULL ) |
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110 | return NULL; |
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111 | |
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112 | memset(c, 0, len * sizeof(struct roar_keyval)); |
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113 | |
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114 | ret = roar_mm_malloc(buflen); |
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115 | if ( ret == NULL ) |
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116 | return NULL; |
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117 | |
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118 | memset(ret, 0, buflen); |
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119 | |
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120 | p = ret; |
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121 | |
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122 | for (i = 0; i < len; i++) { |
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123 | if ( src[i].key == NULL ) { |
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124 | c[i].key = NULL; |
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125 | } else { |
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126 | c[i].key = p; |
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127 | _copy_str(&p, src[i].key); |
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128 | } |
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129 | |
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130 | if ( src[i].value == NULL ) { |
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131 | c[i].value = NULL; |
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132 | } else { |
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133 | c[i].value = p; |
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134 | _copy_str(&p, src[i].value); |
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135 | } |
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136 | } |
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137 | |
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138 | *copy = c; |
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139 | return ret; |
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140 | } |
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141 | |
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142 | static struct roar_dl_librarypara * _copy_para(struct roar_dl_librarypara * para, struct roar_plugincontainer * cont) { |
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143 | struct roar_dl_librarypara * ret = NULL; |
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144 | int err; |
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145 | |
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146 | if ( para == NULL || cont == NULL ) { |
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147 | roar_err_set(ROAR_ERROR_FAULT); |
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148 | return NULL; |
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149 | } |
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150 | |
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151 | ret = roar_dl_para_new(NULL, para->binargv, para->appname, para->abiversion); |
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152 | |
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153 | if ( para->argc && para->argv != NULL ) { |
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154 | ret->argc = para->argc; |
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155 | ret->args_store = _copy_kv(&(ret->argv), para->argv, para->argc); |
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156 | if ( ret->args_store == NULL ) { |
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157 | err = roar_error; |
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158 | roar_dl_para_unref(ret); |
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159 | roar_error = err; |
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160 | return NULL; |
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161 | } |
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162 | } |
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163 | |
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164 | ret->notifycore = para->notifycore; |
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165 | ret->container = cont; |
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166 | ret->loader = _loader; |
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167 | ret->loader_userdata = NULL; |
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168 | |
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169 | return ret; |
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170 | } |
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171 | |
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172 | static struct roar_plugincontainer * _new_init(void) { |
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173 | struct roar_plugincontainer * ret = roar_mm_malloc(sizeof(struct roar_plugincontainer)); |
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174 | if ( ret == NULL ) |
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175 | return NULL; |
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176 | |
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177 | memset(ret, 0, sizeof(struct roar_plugincontainer)); |
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178 | |
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179 | ret->refc = 1; |
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180 | |
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181 | return ret; |
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182 | } |
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183 | |
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184 | struct roar_plugincontainer * roar_plugincontainer_new(struct roar_dl_librarypara * default_para) { |
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185 | struct roar_plugincontainer * ret = _new_init(); |
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186 | int err; |
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187 | |
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188 | if ( ret == NULL ) |
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189 | return NULL; |
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190 | |
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191 | if ( default_para != NULL ) { |
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192 | ret->default_para = _copy_para(default_para, ret); |
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193 | if ( ret->default_para == NULL ) { |
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194 | err = roar_error; |
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195 | roar_plugincontainer_unref(ret); |
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196 | roar_err_set(err); |
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197 | return NULL; |
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198 | } |
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199 | } |
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200 | |
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201 | return ret; |
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202 | } |
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203 | |
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204 | struct roar_plugincontainer * roar_plugincontainer_new_simple(const char * appname, const char * abiversion) { |
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205 | struct roar_plugincontainer * ret; |
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206 | struct roar_dl_librarypara * para = roar_dl_para_new(NULL, NULL, appname, abiversion); |
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207 | int err; |
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208 | |
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209 | ret = roar_plugincontainer_new(para); |
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210 | err = roar_error; |
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211 | |
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212 | roar_dl_para_unref(para); |
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213 | |
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214 | roar_err_set(err); |
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215 | return ret; |
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216 | } |
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217 | |
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218 | int roar_plugincontainer_ref(struct roar_plugincontainer * cont) { |
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219 | if ( cont == NULL ) { |
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220 | ROAR_DBG("roar_plugincontainer_ref(cont=%p) = -1 // error=FAULT", cont); |
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221 | roar_err_set(ROAR_ERROR_FAULT); |
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222 | return -1; |
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223 | } |
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224 | |
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225 | cont->refc++; |
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226 | |
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227 | ROAR_DBG("roar_plugincontainer_ref(cont=%p) = 0", cont); |
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228 | return 0; |
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229 | } |
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230 | |
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231 | int roar_plugincontainer_unref(struct roar_plugincontainer * cont) { |
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232 | size_t i; |
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233 | |
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234 | if ( cont == NULL ) { |
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235 | ROAR_DBG("roar_plugincontainer_unref(cont=%p) = -1 // error=FAULT", cont); |
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236 | roar_err_set(ROAR_ERROR_FAULT); |
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237 | return -1; |
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238 | } |
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239 | |
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240 | cont->refc--; |
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241 | |
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242 | if ( cont->refc ) { |
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243 | ROAR_DBG("roar_plugincontainer_unref(cont=%p) = 0", cont); |
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244 | return 0; |
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245 | } |
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246 | |
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247 | if ( cont->callbacks != NULL && cont->callbacks->prefree != NULL ) |
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248 | cont->callbacks->prefree(cont, &(cont->userdata)); |
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249 | |
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250 | while (cont->numhandles) { |
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251 | for (i = 0; i < MAX_PLUGINS; i++) { |
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252 | if ( cont->handle[i] == NULL ) |
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253 | continue; |
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254 | |
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255 | // skip plugins in use by others. We will unload them in a later loop. |
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256 | if ( cont->deprefc[i] ) |
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257 | continue; |
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258 | |
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259 | _unload(cont, i); |
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260 | } |
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261 | } |
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262 | |
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263 | // try to free user data... |
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264 | if ( cont->userdata != NULL ) { |
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265 | if ( cont->callbacks != NULL && cont->callbacks->freeuserdata != NULL ) { |
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266 | cont->callbacks->freeuserdata(cont, &(cont->userdata)); |
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267 | } |
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268 | } |
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269 | |
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270 | // if still not freed by caller, free it using memmgr. |
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271 | if ( cont->userdata != NULL ) |
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272 | roar_mm_free(cont->userdata); |
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273 | |
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274 | if ( cont->default_para != NULL ) |
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275 | roar_dl_para_unref(cont->default_para); |
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276 | |
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277 | roar_mm_free(cont); |
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278 | |
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279 | ROAR_DBG("roar_plugincontainer_unref(cont=%p) = 0", cont); |
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280 | return 0; |
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281 | } |
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282 | |
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283 | int roar_plugincontainer_set_autoappsched(struct roar_plugincontainer * cont, int val) { |
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284 | if ( cont == NULL ) { |
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285 | roar_err_set(ROAR_ERROR_FAULT); |
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286 | return -1; |
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287 | } |
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288 | |
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289 | if ( val ) { |
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290 | cont->options |= OPT_AUTOAPPSCHED; |
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291 | return 0; |
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292 | } else { |
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293 | if ( cont->options & OPT_AUTOAPPSCHED ) { |
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294 | roar_err_set(ROAR_ERROR_BUSY); |
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295 | return -1; |
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296 | } else { |
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297 | return 0; |
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298 | } |
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299 | } |
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300 | } |
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301 | |
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302 | int roar_plugincontainer_set_callbacks(struct roar_plugincontainer * cont, |
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303 | const struct roar_plugincontainer_callbacks * callbacks) { |
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304 | if ( cont == NULL ) { |
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305 | roar_err_set(ROAR_ERROR_FAULT); |
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306 | return -1; |
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307 | } |
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308 | |
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309 | cont->callbacks = callbacks; |
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310 | |
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311 | return 0; |
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312 | } |
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313 | |
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314 | int roar_plugincontainer_set_userdata(struct roar_plugincontainer * cont, void * userdata) { |
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315 | if ( cont == NULL ) { |
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316 | roar_err_set(ROAR_ERROR_FAULT); |
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317 | return -1; |
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318 | } |
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319 | |
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320 | cont->userdata = userdata; |
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321 | |
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322 | return 0; |
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323 | } |
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324 | |
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325 | void * roar_plugincontainer_get_userdata(struct roar_plugincontainer * cont) { |
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326 | if ( cont == NULL ) { |
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327 | roar_err_set(ROAR_ERROR_FAULT); |
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328 | return NULL; |
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329 | } |
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330 | |
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331 | if ( cont->userdata == NULL ) { |
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332 | roar_err_set(ROAR_ERROR_NOENT); |
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333 | return NULL; |
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334 | } |
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335 | |
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336 | return cont->userdata; |
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337 | } |
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338 | |
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339 | struct roar_plugincontainer_plugininfo roar_plugincontainer_get_info_by_name (struct roar_plugincontainer * cont, |
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340 | const char * name) { |
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341 | struct roar_plugincontainer_plugininfo ret; |
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342 | const struct roar_dl_libraryname * libname; |
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343 | size_t i; |
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344 | |
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345 | memset(&ret, 0, sizeof(ret)); |
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346 | |
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347 | if ( cont == NULL || name == NULL ) { |
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348 | roar_err_set(ROAR_ERROR_FAULT); |
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349 | return ret; |
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350 | } |
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351 | |
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352 | for (i = 0; i < MAX_PLUGINS; i++) { |
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353 | if ( cont->handle[i] == NULL ) |
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354 | continue; |
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355 | libname = roar_dl_getlibname(cont->handle[i]); |
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356 | if ( libname == NULL ) |
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357 | continue; |
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358 | |
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359 | if ( !strcmp(libname->name, name) ) { |
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360 | if ( roar_dl_ref(cont->handle[i]) == -1 ) |
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361 | return ret; |
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362 | |
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363 | ret.libname = libname->name; |
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364 | ret.handle = cont->handle[i]; |
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365 | ret.rdepends = cont->deprefc[i]; |
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366 | ret.context = &(cont->context[i]); |
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367 | return ret; |
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368 | } |
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369 | } |
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370 | |
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371 | roar_err_set(ROAR_ERROR_NOENT); |
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372 | return ret; |
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373 | } |
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374 | |
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375 | struct roar_dl_lhandle * roar_plugincontainer_get_lhandle_by_name (struct roar_plugincontainer * cont, |
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376 | const char * name) { |
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377 | struct roar_plugincontainer_plugininfo info = roar_plugincontainer_get_info_by_name(cont, name); |
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378 | |
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379 | if ( info.libname == NULL ) |
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380 | return NULL; |
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381 | |
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382 | return info.handle; |
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383 | } |
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384 | |
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385 | // plugin loading and unloading: |
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386 | int roar_plugincontainer_load(struct roar_plugincontainer * cont, const char * name, struct roar_dl_librarypara * para) { |
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387 | struct roar_dl_lhandle * ret = roar_plugincontainer_load_lhandle(cont, name, ROAR_DL_FLAG_PLUGIN, 1, para); |
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388 | |
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389 | if ( ret == NULL ) |
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390 | return -1; |
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391 | |
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392 | roar_dl_unref(ret); |
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393 | |
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394 | return 0; |
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395 | } |
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396 | |
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397 | struct roar_dl_lhandle * roar_plugincontainer_load_lhandle (struct roar_plugincontainer * cont, |
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398 | const char * name, |
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399 | int flags, |
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400 | int ra_init, |
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401 | struct roar_dl_librarypara * para) { |
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402 | ssize_t idx = -1; |
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403 | size_t i; |
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404 | int err; |
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405 | |
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406 | if ( cont == NULL || name == NULL ) { |
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407 | roar_err_set(ROAR_ERROR_FAULT); |
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408 | return NULL; |
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409 | } |
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410 | |
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411 | if ( para == NULL ) { |
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412 | para = cont->default_para; |
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413 | roar_dl_para_ref(para); |
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414 | } else { |
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415 | para = _copy_para(para, cont); |
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416 | } |
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417 | |
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418 | |
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419 | // search for a free index. |
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420 | if ( cont->numhandles == MAX_PLUGINS ) { |
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421 | // return early if we are full. |
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422 | roar_dl_para_unref(para); |
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423 | roar_err_set(ROAR_ERROR_NOSPC); |
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424 | return NULL; |
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425 | } |
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426 | for (i = 0; i < MAX_PLUGINS; i++) { |
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427 | if ( cont->handle[i] == NULL ) { |
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428 | idx = i; |
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429 | break; |
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430 | } |
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431 | } |
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432 | |
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433 | if ( idx == -1 ) { |
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434 | roar_dl_para_unref(para); |
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435 | roar_err_set(ROAR_ERROR_NOSPC); |
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436 | return NULL; |
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437 | } |
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438 | |
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439 | cont->context[idx] = NULL; // clear context. |
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440 | cont->deprefc[idx] = 0; |
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441 | |
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442 | if ( cont->callbacks != NULL && cont->callbacks->preload != NULL ) |
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443 | cont->callbacks->preload(cont, &(cont->context[idx]), name, flags, para); |
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444 | |
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445 | cont->handle[idx] = roar_dl_open(name, flags, 0, para); |
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446 | if ( cont->handle[idx] == NULL ) { |
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447 | err = roar_error; |
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448 | roar_dl_para_unref(para); |
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449 | roar_error = err; |
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450 | return NULL; |
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451 | } |
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452 | |
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453 | cont->numhandles++; |
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454 | |
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455 | if ( cont->callbacks != NULL && cont->callbacks->postload != NULL ) |
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456 | cont->callbacks->postload(cont, &(cont->context[idx]), cont->handle[idx], name, flags, para); |
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457 | |
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458 | if ( ra_init ) { |
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459 | if ( cont->callbacks != NULL && cont->callbacks->prera_init != NULL ) |
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460 | cont->callbacks->prera_init(cont, &(cont->context[idx]), cont->handle[idx], para); |
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461 | if ( roar_dl_ra_init(cont->handle[idx], NULL, para) == -1 ) { |
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462 | err = roar_error; |
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463 | |
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464 | if ( cont->callbacks != NULL && cont->callbacks->postra_init != NULL ) |
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465 | cont->callbacks->postra_init(cont, &(cont->context[idx]), cont->handle[idx], para); |
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466 | |
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467 | _unload(cont, idx); |
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468 | |
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469 | roar_dl_para_unref(para); |
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470 | cont->handle[idx] = NULL; |
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471 | roar_error = err; |
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472 | return NULL; |
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473 | } |
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474 | |
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475 | if ( cont->callbacks != NULL && cont->callbacks->postra_init != NULL ) |
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476 | cont->callbacks->postra_init(cont, &(cont->context[idx]), cont->handle[idx], para); |
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477 | |
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478 | if ( cont->options & OPT_AUTOAPPSCHED ) |
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479 | roar_dl_appsched_trigger(cont->handle[idx], ROAR_DL_APPSCHED_INIT); |
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480 | } |
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481 | |
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482 | roar_dl_para_unref(para); |
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483 | roar_dl_ref(cont->handle[idx]); |
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484 | return cont->handle[idx]; |
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485 | } |
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486 | |
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487 | int roar_plugincontainer_unload(struct roar_plugincontainer * cont, const char * name) { |
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488 | struct roar_dl_lhandle * lhandle; |
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489 | |
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490 | if ( cont == NULL || name == NULL ) { |
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491 | roar_err_set(ROAR_ERROR_FAULT); |
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492 | return -1; |
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493 | } |
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494 | |
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495 | lhandle = roar_plugincontainer_get_lhandle_by_name(cont, name); |
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496 | if ( lhandle == NULL ) |
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497 | return -1; |
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498 | |
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499 | roar_dl_unref(lhandle); // we can do this early here as the handle stay valid in the container's array. |
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500 | |
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501 | return roar_plugincontainer_unload_lhandle(cont, lhandle); |
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502 | } |
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503 | |
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504 | int roar_plugincontainer_unload_lhandle(struct roar_plugincontainer * cont, struct roar_dl_lhandle * lhandle) { |
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505 | size_t i; |
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506 | |
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507 | if ( cont == NULL ) { |
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508 | roar_err_set(ROAR_ERROR_FAULT); |
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509 | return -1; |
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510 | } |
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511 | |
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512 | if ( lhandle == NULL ) { |
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513 | roar_err_set(ROAR_ERROR_INVAL); |
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514 | return -1; |
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515 | } |
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516 | |
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517 | for (i = 0; i < MAX_PLUGINS; i++) { |
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518 | if ( cont->handle[i] == lhandle ) { |
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519 | if ( cont->deprefc[i] ) { |
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520 | // still in use. |
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521 | roar_err_set(ROAR_ERROR_BUSY); |
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522 | return -1; |
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523 | } |
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524 | _unload(cont, i); |
---|
525 | return 0; |
---|
526 | } |
---|
527 | } |
---|
528 | |
---|
529 | roar_err_set(ROAR_ERROR_NOENT); |
---|
530 | return -1; |
---|
531 | } |
---|
532 | |
---|
533 | int roar_plugincontainer_ra_init (struct roar_plugincontainer * cont) { |
---|
534 | size_t i; |
---|
535 | |
---|
536 | if ( cont == NULL ) { |
---|
537 | roar_err_set(ROAR_ERROR_FAULT); |
---|
538 | return -1; |
---|
539 | } |
---|
540 | |
---|
541 | for (i = 0; i < MAX_PLUGINS; i++) { |
---|
542 | if ( cont->handle[i] == NULL ) |
---|
543 | continue; |
---|
544 | |
---|
545 | if ( cont->callbacks != NULL && cont->callbacks->prera_init != NULL ) |
---|
546 | cont->callbacks->prera_init(cont, &(cont->context[i]), cont->handle[i], cont->default_para); |
---|
547 | |
---|
548 | roar_dl_ra_init(cont->handle[i], NULL, cont->default_para); |
---|
549 | |
---|
550 | if ( cont->callbacks != NULL && cont->callbacks->postra_init != NULL ) |
---|
551 | cont->callbacks->postra_init(cont, &(cont->context[i]), cont->handle[i], cont->default_para); |
---|
552 | |
---|
553 | if ( cont->options & OPT_AUTOAPPSCHED ) |
---|
554 | roar_dl_appsched_trigger(cont->handle[i], ROAR_DL_APPSCHED_INIT); |
---|
555 | } |
---|
556 | |
---|
557 | return 0; |
---|
558 | } |
---|
559 | |
---|
560 | // appsched: |
---|
561 | int roar_plugincontainer_appsched_trigger(struct roar_plugincontainer * cont, enum roar_dl_appsched_trigger trigger) { |
---|
562 | size_t i; |
---|
563 | int ret = -1; |
---|
564 | int rv; |
---|
565 | |
---|
566 | if ( cont == NULL ) { |
---|
567 | roar_err_set(ROAR_ERROR_FAULT); |
---|
568 | return -1; |
---|
569 | } |
---|
570 | |
---|
571 | if ( cont->numhandles == 1 ) { |
---|
572 | for (i = 0; i < MAX_PLUGINS; i++) { |
---|
573 | if ( cont->handle[i] == NULL ) |
---|
574 | continue; |
---|
575 | return roar_dl_appsched_trigger(cont->handle[i], trigger); |
---|
576 | } |
---|
577 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
---|
578 | roar_err_set(ROAR_ERROR_FAULT); |
---|
579 | return -1; |
---|
580 | } |
---|
581 | |
---|
582 | for (i = 0; i < MAX_PLUGINS; i++) { |
---|
583 | if ( cont->handle[i] == NULL ) |
---|
584 | continue; |
---|
585 | |
---|
586 | rv = roar_dl_appsched_trigger(cont->handle[i], trigger); |
---|
587 | if ( rv == 0 ) |
---|
588 | ret = 0; |
---|
589 | } |
---|
590 | |
---|
591 | return ret; |
---|
592 | } |
---|
593 | |
---|
594 | //ll |
---|