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 | struct roar_plugincontainer { |
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41 | size_t refc; |
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42 | const struct roar_plugincontainer_callbacks * callbacks; |
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43 | void * userdata; |
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44 | struct roar_dl_librarypara * default_para; |
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45 | struct roar_dl_lhandle * handle[MAX_PLUGINS]; |
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46 | size_t deprefc[MAX_PLUGINS]; |
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47 | void * context[MAX_PLUGINS]; |
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48 | size_t numhandles; |
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49 | }; |
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50 | |
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51 | static inline void _unload(struct roar_plugincontainer * cont, size_t index) { |
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52 | int err = roar_error; |
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53 | |
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54 | if ( cont->callbacks != NULL && cont->callbacks->preunload != NULL ) |
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55 | cont->callbacks->preunload(cont, &(cont->context[index]), cont->handle[index]); |
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56 | |
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57 | roar_err_set(err); |
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58 | roar_dl_unref(cont->handle[index]); |
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59 | err = roar_error; |
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60 | cont->handle[index] = NULL; |
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61 | cont->numhandles--; |
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62 | |
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63 | if ( cont->callbacks != NULL && cont->callbacks->postunload != NULL ) |
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64 | cont->callbacks->postunload(cont, &(cont->context[index])); |
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65 | |
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66 | if ( cont->context[index] != NULL ) |
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67 | if ( cont->callbacks != NULL && cont->callbacks->freecontext != NULL ) |
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68 | cont->callbacks->freecontext(cont, &(cont->context[index])); |
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69 | |
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70 | if ( cont->context[index] != NULL ) { |
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71 | roar_mm_free(cont->context[index]); |
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72 | cont->context[index] = NULL; |
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73 | } |
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74 | |
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75 | roar_err_set(err); |
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76 | } |
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77 | |
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78 | static int _loader(struct roar_dl_librarypara * lhandle, void * loader_userdata, enum roar_dl_loadercmd cmd, void * argp) { |
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79 | roar_err_set(ROAR_ERROR_NOSYS); |
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80 | return -1; |
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81 | } |
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82 | |
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83 | static inline void _copy_str(char ** dst, const char * src) { |
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84 | for (; *src; src++, (*dst)++) **dst = *src; |
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85 | *((*dst)++) = 0; |
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86 | } |
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87 | |
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88 | static void * _copy_kv(struct roar_keyval ** copy, struct roar_keyval * src, size_t len) { |
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89 | size_t buflen = 0; |
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90 | size_t i; |
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91 | void * ret; |
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92 | char * p; |
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93 | struct roar_keyval * c; |
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94 | |
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95 | for (i = 0; i < len; i++) { |
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96 | if ( src[i].key != NULL ) |
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97 | buflen += roar_mm_strlen(src[i].key) + 1; |
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98 | if ( src[i].value != NULL ) |
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99 | buflen += roar_mm_strlen(src[i].value) + 1; |
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100 | } |
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101 | |
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102 | c = roar_mm_malloc(len * sizeof(struct roar_keyval)); |
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103 | if ( c == NULL ) |
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104 | return NULL; |
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105 | |
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106 | memset(c, 0, len * sizeof(struct roar_keyval)); |
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107 | |
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108 | ret = roar_mm_malloc(buflen); |
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109 | if ( ret == NULL ) |
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110 | return NULL; |
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111 | |
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112 | memset(ret, 0, buflen); |
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113 | |
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114 | p = ret; |
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115 | |
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116 | for (i = 0; i < len; i++) { |
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117 | if ( src[i].key == NULL ) { |
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118 | c[i].key = NULL; |
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119 | } else { |
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120 | c[i].key = p; |
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121 | _copy_str(&p, src[i].key); |
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122 | } |
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123 | |
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124 | if ( src[i].value == NULL ) { |
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125 | c[i].value = NULL; |
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126 | } else { |
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127 | c[i].value = p; |
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128 | _copy_str(&p, src[i].value); |
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129 | } |
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130 | } |
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131 | |
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132 | *copy = c; |
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133 | return ret; |
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134 | } |
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135 | |
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136 | static struct roar_dl_librarypara * _copy_para(struct roar_dl_librarypara * para, struct roar_plugincontainer * cont) { |
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137 | struct roar_dl_librarypara * ret = NULL; |
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138 | int err; |
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139 | |
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140 | if ( para == NULL || cont == NULL ) { |
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141 | roar_err_set(ROAR_ERROR_FAULT); |
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142 | return NULL; |
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143 | } |
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144 | |
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145 | ret = roar_dl_para_new(NULL, para->binargv, para->appname, para->abiversion); |
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146 | |
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147 | if ( para->argc && para->argv != NULL ) { |
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148 | ret->argc = para->argc; |
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149 | ret->args_store = _copy_kv(&(ret->argv), para->argv, para->argc); |
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150 | if ( ret->args_store == NULL ) { |
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151 | err = roar_error; |
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152 | roar_dl_para_unref(ret); |
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153 | roar_error = err; |
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154 | return NULL; |
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155 | } |
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156 | } |
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157 | |
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158 | ret->notifycore = para->notifycore; |
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159 | ret->container = cont; |
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160 | ret->loader = _loader; |
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161 | ret->loader_userdata = NULL; |
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162 | |
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163 | return ret; |
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164 | } |
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165 | |
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166 | static struct roar_plugincontainer * _new_init(void) { |
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167 | struct roar_plugincontainer * ret = roar_mm_malloc(sizeof(struct roar_plugincontainer)); |
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168 | if ( ret == NULL ) |
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169 | return NULL; |
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170 | |
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171 | memset(ret, 0, sizeof(struct roar_plugincontainer)); |
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172 | |
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173 | ret->refc = 1; |
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174 | |
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175 | return ret; |
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176 | } |
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177 | |
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178 | struct roar_plugincontainer * roar_plugincontainer_new(struct roar_dl_librarypara * default_para) { |
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179 | struct roar_plugincontainer * ret = _new_init(); |
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180 | int err; |
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181 | |
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182 | if ( ret == NULL ) |
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183 | return NULL; |
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184 | |
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185 | if ( default_para != NULL ) { |
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186 | ret->default_para = _copy_para(default_para, ret); |
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187 | if ( ret->default_para == NULL ) { |
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188 | err = roar_error; |
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189 | roar_plugincontainer_unref(ret); |
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190 | roar_err_set(err); |
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191 | return NULL; |
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192 | } |
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193 | } |
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194 | |
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195 | return ret; |
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196 | } |
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197 | |
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198 | struct roar_plugincontainer * roar_plugincontainer_new_simple(const char * appname, const char * abiversion) { |
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199 | struct roar_plugincontainer * ret; |
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200 | struct roar_dl_librarypara * para = roar_dl_para_new(NULL, NULL, appname, abiversion); |
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201 | int err; |
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202 | |
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203 | ret = roar_plugincontainer_new(para); |
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204 | err = roar_error; |
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205 | |
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206 | roar_dl_para_unref(para); |
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207 | |
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208 | roar_err_set(err); |
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209 | return ret; |
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210 | } |
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211 | |
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212 | int roar_plugincontainer_ref(struct roar_plugincontainer * cont) { |
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213 | if ( cont == NULL ) { |
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214 | ROAR_DBG("roar_plugincontainer_ref(cont=%p) = -1 // error=FAULT", cont); |
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215 | roar_err_set(ROAR_ERROR_FAULT); |
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216 | return -1; |
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217 | } |
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218 | |
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219 | cont->refc++; |
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220 | |
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221 | ROAR_DBG("roar_plugincontainer_ref(cont=%p) = 0", cont); |
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222 | return 0; |
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223 | } |
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224 | |
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225 | int roar_plugincontainer_unref(struct roar_plugincontainer * cont) { |
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226 | size_t i; |
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227 | |
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228 | if ( cont == NULL ) { |
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229 | ROAR_DBG("roar_plugincontainer_unref(cont=%p) = -1 // error=FAULT", cont); |
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230 | roar_err_set(ROAR_ERROR_FAULT); |
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231 | return -1; |
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232 | } |
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233 | |
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234 | cont->refc--; |
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235 | |
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236 | if ( cont->refc ) { |
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237 | ROAR_DBG("roar_plugincontainer_unref(cont=%p) = 0", cont); |
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238 | return 0; |
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239 | } |
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240 | |
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241 | if ( cont->callbacks != NULL && cont->callbacks->prefree != NULL ) |
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242 | cont->callbacks->prefree(cont, &(cont->userdata)); |
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243 | |
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244 | while (cont->numhandles) { |
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245 | for (i = 0; i < MAX_PLUGINS; i++) { |
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246 | if ( cont->handle[i] == NULL ) |
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247 | continue; |
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248 | |
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249 | // skip plugins in use by others. We will unload them in a later loop. |
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250 | if ( cont->deprefc[i] ) |
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251 | continue; |
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252 | |
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253 | _unload(cont, i); |
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254 | } |
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255 | } |
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256 | |
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257 | // try to free user data... |
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258 | if ( cont->userdata != NULL ) { |
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259 | if ( cont->callbacks != NULL && cont->callbacks->freeuserdata != NULL ) { |
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260 | cont->callbacks->freeuserdata(cont, &(cont->userdata)); |
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261 | } |
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262 | } |
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263 | |
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264 | // if still not freed by caller, free it using memmgr. |
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265 | if ( cont->userdata != NULL ) |
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266 | roar_mm_free(cont->userdata); |
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267 | |
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268 | if ( cont->default_para != NULL ) |
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269 | roar_dl_para_unref(cont->default_para); |
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270 | |
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271 | roar_mm_free(cont); |
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272 | |
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273 | ROAR_DBG("roar_plugincontainer_unref(cont=%p) = 0", cont); |
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274 | return 0; |
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275 | } |
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276 | |
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277 | int roar_plugincontainer_set_callbacks(struct roar_plugincontainer * cont, |
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278 | const struct roar_plugincontainer_callbacks * callbacks) { |
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279 | if ( cont == NULL ) { |
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280 | roar_err_set(ROAR_ERROR_FAULT); |
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281 | return -1; |
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282 | } |
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283 | |
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284 | cont->callbacks = callbacks; |
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285 | |
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286 | return 0; |
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287 | } |
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288 | |
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289 | int roar_plugincontainer_set_userdata(struct roar_plugincontainer * cont, void * userdata) { |
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290 | if ( cont == NULL ) { |
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291 | roar_err_set(ROAR_ERROR_FAULT); |
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292 | return -1; |
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293 | } |
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294 | |
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295 | cont->userdata = userdata; |
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296 | |
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297 | return 0; |
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298 | } |
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299 | |
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300 | void * roar_plugincontainer_get_userdata(struct roar_plugincontainer * cont) { |
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301 | if ( cont == NULL ) { |
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302 | roar_err_set(ROAR_ERROR_FAULT); |
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303 | return NULL; |
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304 | } |
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305 | |
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306 | if ( cont->userdata == NULL ) { |
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307 | roar_err_set(ROAR_ERROR_NOENT); |
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308 | return NULL; |
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309 | } |
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310 | |
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311 | return cont->userdata; |
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312 | } |
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313 | |
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314 | struct roar_plugincontainer_plugininfo roar_plugincontainer_get_info_by_name (struct roar_plugincontainer * cont, |
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315 | const char * name) { |
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316 | struct roar_plugincontainer_plugininfo ret; |
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317 | const struct roar_dl_libraryname * libname; |
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318 | size_t i; |
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319 | |
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320 | memset(&ret, 0, sizeof(ret)); |
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321 | |
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322 | if ( cont == NULL || name == NULL ) { |
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323 | roar_err_set(ROAR_ERROR_FAULT); |
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324 | return ret; |
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325 | } |
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326 | |
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327 | for (i = 0; i < MAX_PLUGINS; i++) { |
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328 | if ( cont->handle[i] == NULL ) |
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329 | continue; |
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330 | libname = roar_dl_getlibname(cont->handle[i]); |
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331 | if ( libname == NULL ) |
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332 | continue; |
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333 | |
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334 | if ( !strcmp(libname->name, name) ) { |
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335 | if ( roar_dl_ref(cont->handle[i]) == -1 ) |
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336 | return ret; |
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337 | |
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338 | ret.libname = libname->name; |
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339 | ret.handle = cont->handle[i]; |
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340 | ret.rdepends = cont->deprefc[i]; |
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341 | ret.context = &(cont->context[i]); |
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342 | return ret; |
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343 | } |
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344 | } |
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345 | |
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346 | roar_err_set(ROAR_ERROR_NOENT); |
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347 | return ret; |
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348 | } |
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349 | |
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350 | struct roar_dl_lhandle * roar_plugincontainer_get_lhandle_by_name (struct roar_plugincontainer * cont, |
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351 | const char * name) { |
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352 | struct roar_plugincontainer_plugininfo info = roar_plugincontainer_get_info_by_name(cont, name); |
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353 | |
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354 | if ( info.libname == NULL ) |
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355 | return NULL; |
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356 | |
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357 | return info.handle; |
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358 | } |
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359 | |
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360 | // plugin loading and unloading: |
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361 | int roar_plugincontainer_load(struct roar_plugincontainer * cont, const char * name, struct roar_dl_librarypara * para) { |
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362 | struct roar_dl_lhandle * ret = roar_plugincontainer_load_lhandle(cont, name, ROAR_DL_FLAG_PLUGIN, 1, para); |
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363 | |
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364 | if ( ret == NULL ) |
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365 | return -1; |
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366 | |
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367 | roar_dl_unref(ret); |
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368 | |
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369 | return 0; |
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370 | } |
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371 | |
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372 | struct roar_dl_lhandle * roar_plugincontainer_load_lhandle (struct roar_plugincontainer * cont, |
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373 | const char * name, |
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374 | int flags, |
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375 | int ra_init, |
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376 | struct roar_dl_librarypara * para) { |
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377 | ssize_t idx = -1; |
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378 | size_t i; |
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379 | int err; |
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380 | |
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381 | if ( cont == NULL || name == NULL ) { |
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382 | roar_err_set(ROAR_ERROR_FAULT); |
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383 | return NULL; |
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384 | } |
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385 | |
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386 | if ( para == NULL ) { |
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387 | para = cont->default_para; |
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388 | roar_dl_para_ref(para); |
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389 | } else { |
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390 | para = _copy_para(para, cont); |
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391 | } |
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392 | |
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393 | |
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394 | // search for a free index. |
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395 | if ( cont->numhandles == MAX_PLUGINS ) { |
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396 | // return early if we are full. |
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397 | roar_dl_para_unref(para); |
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398 | roar_err_set(ROAR_ERROR_NOSPC); |
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399 | return NULL; |
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400 | } |
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401 | for (i = 0; i < MAX_PLUGINS; i++) { |
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402 | if ( cont->handle[i] == NULL ) { |
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403 | idx = i; |
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404 | break; |
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405 | } |
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406 | } |
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407 | |
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408 | if ( idx == -1 ) { |
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409 | roar_dl_para_unref(para); |
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410 | roar_err_set(ROAR_ERROR_NOSPC); |
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411 | return NULL; |
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412 | } |
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413 | |
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414 | cont->context[idx] = NULL; // clear context. |
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415 | cont->deprefc[idx] = 0; |
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416 | |
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417 | if ( cont->callbacks != NULL && cont->callbacks->preload != NULL ) |
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418 | cont->callbacks->preload(cont, &(cont->context[idx]), name, flags, para); |
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419 | |
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420 | cont->handle[idx] = roar_dl_open(name, flags, 0, para); |
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421 | if ( cont->handle[idx] == NULL ) { |
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422 | err = roar_error; |
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423 | roar_dl_para_unref(para); |
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424 | roar_error = err; |
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425 | return NULL; |
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426 | } |
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427 | |
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428 | cont->numhandles++; |
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429 | |
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430 | if ( cont->callbacks != NULL && cont->callbacks->postload != NULL ) |
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431 | cont->callbacks->postload(cont, &(cont->context[idx]), cont->handle[idx], name, flags, para); |
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432 | |
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433 | if ( ra_init ) { |
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434 | if ( cont->callbacks != NULL && cont->callbacks->prera_init != NULL ) |
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435 | cont->callbacks->prera_init(cont, &(cont->context[idx]), cont->handle[idx], para); |
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436 | if ( roar_dl_ra_init(cont->handle[idx], NULL, para) == -1 ) { |
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437 | err = roar_error; |
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438 | |
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439 | if ( cont->callbacks != NULL && cont->callbacks->postra_init != NULL ) |
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440 | cont->callbacks->postra_init(cont, &(cont->context[idx]), cont->handle[idx], para); |
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441 | |
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442 | _unload(cont, idx); |
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443 | |
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444 | roar_dl_para_unref(para); |
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445 | cont->handle[idx] = NULL; |
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446 | roar_error = err; |
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447 | return NULL; |
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448 | } |
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449 | |
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450 | if ( cont->callbacks != NULL && cont->callbacks->postra_init != NULL ) |
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451 | cont->callbacks->postra_init(cont, &(cont->context[idx]), cont->handle[idx], para); |
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452 | } |
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453 | |
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454 | roar_dl_para_unref(para); |
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455 | roar_dl_ref(cont->handle[idx]); |
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456 | return cont->handle[idx]; |
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457 | } |
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458 | |
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459 | int roar_plugincontainer_unload(struct roar_plugincontainer * cont, const char * name) { |
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460 | struct roar_dl_lhandle * lhandle; |
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461 | |
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462 | if ( cont == NULL || name == NULL ) { |
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463 | roar_err_set(ROAR_ERROR_FAULT); |
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464 | return -1; |
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465 | } |
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466 | |
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467 | lhandle = roar_plugincontainer_get_lhandle_by_name(cont, name); |
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468 | if ( lhandle == NULL ) |
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469 | return -1; |
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470 | |
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471 | roar_dl_unref(lhandle); // we can do this early here as the handle stay valid in the container's array. |
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472 | |
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473 | return roar_plugincontainer_unload_lhandle(cont, lhandle); |
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474 | } |
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475 | |
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476 | int roar_plugincontainer_unload_lhandle(struct roar_plugincontainer * cont, struct roar_dl_lhandle * lhandle) { |
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477 | size_t i; |
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478 | |
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479 | if ( cont == NULL ) { |
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480 | roar_err_set(ROAR_ERROR_FAULT); |
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481 | return -1; |
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482 | } |
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483 | |
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484 | if ( lhandle == NULL ) { |
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485 | roar_err_set(ROAR_ERROR_INVAL); |
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486 | return -1; |
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487 | } |
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488 | |
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489 | for (i = 0; i < MAX_PLUGINS; i++) { |
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490 | if ( cont->handle[i] == lhandle ) { |
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491 | if ( cont->deprefc[i] ) { |
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492 | // still in use. |
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493 | roar_err_set(ROAR_ERROR_BUSY); |
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494 | return -1; |
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495 | } |
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496 | _unload(cont, i); |
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497 | return 0; |
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498 | } |
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499 | } |
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500 | |
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501 | roar_err_set(ROAR_ERROR_NOENT); |
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502 | return -1; |
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503 | } |
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504 | |
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505 | int roar_plugincontainer_ra_init (struct roar_plugincontainer * cont) { |
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506 | size_t i; |
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507 | |
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508 | if ( cont == NULL ) { |
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509 | roar_err_set(ROAR_ERROR_FAULT); |
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510 | return -1; |
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511 | } |
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512 | |
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513 | for (i = 0; i < MAX_PLUGINS; i++) { |
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514 | if ( cont->handle[i] == NULL ) |
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515 | continue; |
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516 | |
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517 | if ( cont->callbacks != NULL && cont->callbacks->prera_init != NULL ) |
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518 | cont->callbacks->prera_init(cont, &(cont->context[i]), cont->handle[i], cont->default_para); |
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519 | |
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520 | roar_dl_ra_init(cont->handle[i], NULL, cont->default_para); |
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521 | |
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522 | if ( cont->callbacks != NULL && cont->callbacks->postra_init != NULL ) |
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523 | cont->callbacks->postra_init(cont, &(cont->context[i]), cont->handle[i], cont->default_para); |
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524 | } |
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525 | |
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526 | return 0; |
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527 | } |
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528 | |
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529 | // appsched: |
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530 | int roar_plugincontainer_appsched_trigger(struct roar_plugincontainer * cont, enum roar_dl_appsched_trigger trigger) { |
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531 | size_t i; |
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532 | int ret = -1; |
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533 | int rv; |
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534 | |
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535 | if ( cont == NULL ) { |
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536 | roar_err_set(ROAR_ERROR_FAULT); |
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537 | return -1; |
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538 | } |
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539 | |
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540 | if ( cont->numhandles == 1 ) { |
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541 | for (i = 0; i < MAX_PLUGINS; i++) { |
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542 | if ( cont->handle[i] == NULL ) |
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543 | continue; |
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544 | return roar_dl_appsched_trigger(cont->handle[i], trigger); |
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545 | } |
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546 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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547 | roar_err_set(ROAR_ERROR_FAULT); |
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548 | return -1; |
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549 | } |
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550 | |
---|
551 | for (i = 0; i < MAX_PLUGINS; i++) { |
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552 | if ( cont->handle[i] == NULL ) |
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553 | continue; |
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554 | |
---|
555 | rv = roar_dl_appsched_trigger(cont->handle[i], trigger); |
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556 | if ( rv == 0 ) |
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557 | ret = 0; |
---|
558 | } |
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559 | |
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560 | return ret; |
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561 | } |
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562 | |
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563 | //ll |
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