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 | struct roar_dl_librarypara * default_para; |
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43 | struct roar_dl_lhandle * handle[MAX_PLUGINS]; |
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44 | size_t deprefc[MAX_PLUGINS]; |
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45 | size_t numhandles; |
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46 | }; |
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47 | |
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48 | static int _loader(struct roar_dl_librarypara * lhandle, void * loader_userdata, enum roar_dl_loadercmd cmd, void * argp) { |
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49 | roar_err_set(ROAR_ERROR_NOSYS); |
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50 | return -1; |
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51 | } |
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52 | |
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53 | static inline void _copy_str(char ** dst, const char * src) { |
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54 | for (; *src; src++, (*dst)++) **dst = *src; |
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55 | *((*dst)++) = 0; |
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56 | } |
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57 | |
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58 | static void * _copy_kv(struct roar_keyval ** copy, struct roar_keyval * src, size_t len) { |
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59 | size_t buflen, i; |
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60 | void * ret; |
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61 | char * p; |
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62 | struct roar_keyval * c; |
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63 | |
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64 | buflen = len * (sizeof(struct roar_keyval) + 2 /* terminating \0s */); |
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65 | |
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66 | for (i = 0; i < len; i++) { |
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67 | if ( src[i].key != NULL ) |
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68 | buflen += roar_mm_strlen(src[i].key); |
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69 | if ( src[i].value != NULL ) |
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70 | buflen += roar_mm_strlen(src[i].value); |
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71 | } |
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72 | |
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73 | ret = roar_mm_malloc(buflen); |
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74 | if ( ret == NULL ) |
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75 | return NULL; |
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76 | |
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77 | memset(ret, 0, buflen); |
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78 | |
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79 | c = ret; |
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80 | p = ret + len*sizeof(struct roar_keyval); |
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81 | |
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82 | for (i = 0; i < len; i++) { |
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83 | if ( src[i].key == NULL ) { |
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84 | c[i].key = NULL; |
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85 | } else { |
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86 | c[i].key = p; |
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87 | _copy_str(&p, src[i].key); |
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88 | } |
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89 | |
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90 | if ( src[i].value == NULL ) { |
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91 | c[i].value = NULL; |
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92 | } else { |
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93 | c[i].value = p; |
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94 | _copy_str(&p, src[i].value); |
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95 | } |
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96 | } |
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97 | |
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98 | *copy = c; |
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99 | return ret; |
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100 | } |
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101 | |
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102 | static struct roar_dl_librarypara * _copy_para(struct roar_dl_librarypara * para, struct roar_plugincontainer * cont) { |
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103 | struct roar_dl_librarypara * ret = NULL; |
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104 | int err; |
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105 | |
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106 | if ( para == NULL || cont == NULL ) { |
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107 | roar_err_set(ROAR_ERROR_FAULT); |
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108 | return NULL; |
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109 | } |
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110 | |
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111 | ret = roar_dl_para_new(NULL, para->binargv, para->appname, para->abiversion); |
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112 | |
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113 | if ( para->argc && para->argv != NULL ) { |
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114 | ret->argc = para->argc; |
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115 | ret->args_store = _copy_kv(&(ret->argv), para->argv, para->argc); |
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116 | if ( ret->args_store == NULL ) { |
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117 | err = roar_error; |
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118 | roar_dl_para_unref(ret); |
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119 | roar_error = err; |
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120 | return NULL; |
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121 | } |
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122 | } |
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123 | |
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124 | ret->notifycore = para->notifycore; |
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125 | ret->container = cont; |
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126 | ret->loader = _loader; |
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127 | ret->loader_userdata = NULL; |
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128 | |
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129 | return ret; |
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130 | } |
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131 | |
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132 | static struct roar_plugincontainer * _new_init(void) { |
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133 | struct roar_plugincontainer * ret = roar_mm_malloc(sizeof(struct roar_plugincontainer)); |
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134 | if ( ret == NULL ) |
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135 | return NULL; |
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136 | |
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137 | memset(ret, 0, sizeof(struct roar_plugincontainer)); |
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138 | |
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139 | ret->refc = 1; |
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140 | |
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141 | return ret; |
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142 | } |
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143 | |
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144 | struct roar_plugincontainer * roar_plugincontainer_new(struct roar_dl_librarypara * default_para) { |
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145 | struct roar_plugincontainer * ret = _new_init(); |
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146 | int err; |
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147 | |
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148 | if ( ret == NULL ) |
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149 | return NULL; |
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150 | |
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151 | if ( default_para != NULL ) { |
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152 | ret->default_para = _copy_para(default_para, ret); |
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153 | if ( ret->default_para == NULL ) { |
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154 | err = roar_error; |
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155 | roar_plugincontainer_unref(ret); |
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156 | roar_err_set(err); |
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157 | return NULL; |
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158 | } |
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159 | } |
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160 | |
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161 | return ret; |
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162 | } |
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163 | |
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164 | struct roar_plugincontainer * roar_plugincontainer_new_simple(const char * appname, const char * abiversion) { |
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165 | struct roar_plugincontainer * ret; |
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166 | struct roar_dl_librarypara * para = roar_dl_para_new(NULL, NULL, appname, abiversion); |
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167 | int err; |
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168 | |
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169 | ret = roar_plugincontainer_new(para); |
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170 | err = roar_error; |
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171 | |
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172 | roar_dl_para_unref(para); |
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173 | |
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174 | roar_err_set(err); |
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175 | return ret; |
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176 | } |
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177 | |
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178 | int roar_plugincontainer_ref(struct roar_plugincontainer * cont) { |
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179 | if ( cont == NULL ) { |
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180 | roar_err_set(ROAR_ERROR_FAULT); |
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181 | return -1; |
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182 | } |
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183 | |
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184 | cont->refc++; |
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185 | |
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186 | return 0; |
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187 | } |
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188 | |
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189 | int roar_plugincontainer_unref(struct roar_plugincontainer * cont) { |
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190 | size_t i; |
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191 | |
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192 | if ( cont == NULL ) { |
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193 | roar_err_set(ROAR_ERROR_FAULT); |
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194 | return -1; |
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195 | } |
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196 | |
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197 | cont->refc--; |
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198 | |
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199 | if ( cont->refc ) |
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200 | return 0; |
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201 | |
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202 | while (cont->numhandles) { |
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203 | for (i = 0; i < MAX_PLUGINS; i++) { |
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204 | if ( cont->handle[i] == NULL ) |
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205 | continue; |
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206 | |
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207 | // skip plugins in use by others. We will unload them in a later loop. |
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208 | if ( cont->deprefc[i] ) |
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209 | continue; |
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210 | |
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211 | roar_dl_close(cont->handle[i]); |
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212 | cont->handle[i] = NULL; |
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213 | cont->numhandles--; |
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214 | } |
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215 | } |
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216 | |
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217 | if ( cont->default_para != NULL ) |
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218 | roar_dl_para_unref(cont->default_para); |
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219 | |
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220 | roar_mm_free(cont); |
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221 | |
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222 | return 0; |
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223 | } |
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224 | |
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225 | // plugin loading and unloading: |
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226 | int roar_plugincontainer_load(struct roar_plugincontainer * cont, const char * name, struct roar_dl_librarypara * para) { |
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227 | struct roar_dl_lhandle * ret = roar_plugincontainer_load_lhandle(cont, name, ROAR_DL_FLAG_PLUGIN, 1, para); |
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228 | |
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229 | if ( ret == NULL ) |
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230 | return -1; |
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231 | |
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232 | roar_dl_unref(ret); |
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233 | |
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234 | return 0; |
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235 | } |
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236 | |
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237 | struct roar_dl_lhandle * roar_plugincontainer_load_lhandle (struct roar_plugincontainer * cont, |
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238 | const char * name, |
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239 | int flags, |
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240 | int ra_init, |
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241 | struct roar_dl_librarypara * para) { |
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242 | ssize_t idx = -1; |
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243 | size_t i; |
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244 | int err; |
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245 | |
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246 | if ( cont == NULL || name == NULL ) { |
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247 | roar_err_set(ROAR_ERROR_FAULT); |
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248 | return NULL; |
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249 | } |
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250 | |
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251 | if ( para == NULL ) { |
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252 | para = cont->default_para; |
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253 | roar_dl_para_ref(para); |
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254 | } else { |
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255 | para = _copy_para(para, cont); |
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256 | } |
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257 | |
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258 | |
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259 | // search for a free index. |
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260 | if ( cont->numhandles == MAX_PLUGINS ) { |
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261 | // return early if we are full. |
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262 | roar_dl_para_unref(para); |
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263 | roar_err_set(ROAR_ERROR_NOSPC); |
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264 | return NULL; |
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265 | } |
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266 | for (i = 0; i < MAX_PLUGINS; i++) { |
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267 | if ( cont->handle[i] == NULL ) { |
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268 | idx = i; |
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269 | break; |
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270 | } |
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271 | } |
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272 | |
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273 | if ( idx == -1 ) { |
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274 | roar_dl_para_unref(para); |
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275 | roar_err_set(ROAR_ERROR_NOSPC); |
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276 | return NULL; |
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277 | } |
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278 | |
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279 | cont->handle[idx] = roar_dl_open(name, flags, ra_init, para); |
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280 | if ( cont->handle[idx] == NULL ) { |
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281 | err = roar_error; |
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282 | roar_dl_para_unref(para); |
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283 | roar_error = err; |
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284 | return NULL; |
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285 | } |
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286 | |
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287 | cont->deprefc[idx] = 0; |
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288 | cont->numhandles++; |
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289 | |
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290 | roar_dl_para_unref(para); |
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291 | roar_dl_ref(cont->handle[idx]); |
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292 | return cont->handle[idx]; |
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293 | } |
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294 | |
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295 | int roar_plugincontainer_unload(struct roar_plugincontainer * cont, const char * name) { |
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296 | const struct roar_dl_libraryname * libname; |
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297 | size_t i; |
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298 | |
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299 | if ( cont == NULL || name == NULL ) { |
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300 | roar_err_set(ROAR_ERROR_FAULT); |
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301 | return -1; |
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302 | } |
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303 | |
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304 | for (i = 0; i < MAX_PLUGINS; i++) { |
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305 | if ( cont->handle[i] == NULL ) |
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306 | continue; |
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307 | libname = roar_dl_getlibname(cont->handle[i]); |
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308 | if ( libname == NULL ) |
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309 | continue; |
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310 | |
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311 | if ( !strcmp(libname->name, name) ) |
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312 | return roar_plugincontainer_unload_lhandle(cont, cont->handle[i]); |
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313 | } |
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314 | |
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315 | roar_err_set(ROAR_ERROR_NOENT); |
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316 | return -1; |
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317 | } |
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318 | |
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319 | int roar_plugincontainer_unload_lhandle(struct roar_plugincontainer * cont, struct roar_dl_lhandle * lhandle) { |
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320 | size_t i; |
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321 | |
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322 | if ( cont == NULL ) { |
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323 | roar_err_set(ROAR_ERROR_FAULT); |
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324 | return -1; |
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325 | } |
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326 | |
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327 | if ( lhandle == NULL ) { |
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328 | roar_err_set(ROAR_ERROR_INVAL); |
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329 | return -1; |
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330 | } |
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331 | |
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332 | for (i = 0; i < MAX_PLUGINS; i++) { |
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333 | if ( cont->handle[i] == lhandle ) { |
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334 | if ( cont->deprefc[i] ) { |
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335 | // still in use. |
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336 | roar_err_set(ROAR_ERROR_BUSY); |
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337 | return -1; |
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338 | } |
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339 | roar_dl_close(cont->handle[i]); |
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340 | cont->handle[i] = NULL; |
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341 | cont->numhandles--; |
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342 | return 0; |
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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 -1; |
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348 | } |
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349 | |
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350 | int roar_plugincontainer_ra_init (struct roar_plugincontainer * cont) { |
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351 | size_t i; |
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352 | |
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353 | if ( cont == NULL ) { |
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354 | roar_err_set(ROAR_ERROR_FAULT); |
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355 | return -1; |
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356 | } |
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357 | |
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358 | for (i = 0; i < MAX_PLUGINS; i++) { |
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359 | if ( cont->handle[i] == NULL ) |
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360 | continue; |
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361 | roar_dl_ra_init(cont->handle[i], NULL, cont->default_para); |
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362 | } |
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363 | |
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364 | return 0; |
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365 | } |
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366 | |
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367 | // appsched: |
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368 | int roar_plugincontainer_appsched_trigger(struct roar_plugincontainer * cont, enum roar_dl_appsched_trigger trigger) { |
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369 | size_t i; |
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370 | |
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371 | if ( cont == NULL ) { |
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372 | roar_err_set(ROAR_ERROR_FAULT); |
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373 | return -1; |
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374 | } |
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375 | |
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376 | for (i = 0; i < MAX_PLUGINS; i++) { |
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377 | if ( cont->handle[i] == NULL ) |
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378 | continue; |
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379 | |
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380 | roar_dl_appsched_trigger(cont->handle[i], trigger); |
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381 | } |
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382 | |
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383 | return 0; |
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384 | } |
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385 | |
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386 | //ll |
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