[3297] | 1 | //roardl.h: |
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| 2 | |
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| 3 | /* |
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[5381] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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[3297] | 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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[3517] | 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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[3297] | 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 | #ifndef _LIBROARROARDL_H_ |
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| 37 | #define _LIBROARROARDL_H_ |
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| 38 | |
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| 39 | #include "libroar.h" |
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| 40 | |
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[5317] | 41 | #define ROAR_DL_FLAG_DEFAULTS -1 |
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[5427] | 42 | #define ROAR_DL_FLAG_PLUGIN -2 |
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[5317] | 43 | #define ROAR_DL_FLAG_NONE 0x0000 |
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| 44 | #define ROAR_DL_FLAG_STATIC 0x0001 /* plugins are linked statically -lfoo */ |
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[5344] | 45 | #define ROAR_DL_FLAG_LAZY 0x0002 |
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[5427] | 46 | #define ROAR_DL_FLAG_PLUGINPATH 0x0004 /* Use plugin search path */ |
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[3303] | 47 | |
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[3297] | 48 | #define ROAR_DL_HANDLE_DEFAULT ((struct roar_dl_lhandle*)(void*)0) |
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| 49 | #define ROAR_DL_HANDLE_NEXT ((struct roar_dl_lhandle*)(void*)1) |
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[5511] | 50 | #define ROAR_DL_HANDLE_LIBROAR ((struct roar_dl_lhandle*)(void*)2) |
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| 51 | #define ROAR_DL_HANDLE_APPLICATION ((struct roar_dl_lhandle*)(void*)3) |
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[3297] | 52 | |
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[5511] | 53 | #define ROAR_DL_FN_DSTR 0 /* VIO and DSTR drivers */ |
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| 54 | #define ROAR_DL_FN_CDRIVER 1 /* Client drivers, libroareio */ |
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| 55 | #define ROAR_DL_FN_TRANSCODER 2 /* Transcoder, libroardsp */ |
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| 56 | #define ROAR_DL_FN_DRIVER 3 /* Driver, roard? */ |
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| 57 | #define ROAR_DL_FN_SOURCE 4 /* Sources, roard? */ |
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| 58 | #define ROAR_DL_FN_FILTER 5 /* Filter, libroardsp */ |
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| 59 | #define ROAR_DL_FN_FF 6 /* file format??? */ |
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| 60 | #define ROAR_DL_FN_AUTH 7 /* Auth */ |
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| 61 | #define ROAR_DL_FN_BRIDGE 8 /* Bridges, roard? */ |
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| 62 | #define ROAR_DL_FN_ROARDSCHED 9 /* Like appsched, but roard specific, old */ |
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| 63 | #define ROAR_DL_FN_APPSCHED 10 /* AppSched, old interface */ |
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| 64 | #define ROAR_DL_FN_PROTO 11 /* Protocols, roard? */ |
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| 65 | #define ROAR_DL_FN_NOTIFY 12 /* ??? */ |
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[5317] | 66 | #define ROAR_DL_FN_INIT 13 /* global plugin instance init. should be avoided */ |
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[5511] | 67 | #define ROAR_DL_FN_REGFN 14 /* FN Registrations */ |
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| 68 | #define ROAR_DL_FN_APPLICATION 15 /* Application specific stuff */ |
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[3299] | 69 | //#define ROAR_DL_FN_ 9 |
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[5275] | 70 | #define ROAR_DL_FN_MAX 24 |
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[3300] | 71 | |
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[5275] | 72 | #define ROAR_DL_LIBPARA_VERSION 1 |
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| 73 | #define ROAR_DL_LIBNAME_VERSION 0 |
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| 74 | #define ROAR_DL_LIBINST_VERSION 1 |
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[5347] | 75 | #define ROAR_DL_LIBDEP_VERSION 0 |
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[3300] | 76 | |
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| 77 | #define ROAR_DL_PLUGIN(lib) struct roar_dl_libraryinst * \ |
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[3306] | 78 | _##lib##_roaraudio_library_init(struct roar_dl_librarypara * para); \ |
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| 79 | struct roar_dl_libraryinst * \ |
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[3300] | 80 | _roaraudio_library_init(struct roar_dl_librarypara * para) { \ |
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| 81 | return _##lib##_roaraudio_library_init(para); \ |
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| 82 | } \ |
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| 83 | struct roar_dl_libraryinst * \ |
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| 84 | _##lib##_roaraudio_library_init(struct roar_dl_librarypara * para) \ |
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[3299] | 85 | |
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[3308] | 86 | #define ROAR_DL_PLUGIN_START(xlib) ROAR_DL_PLUGIN(xlib) { \ |
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| 87 | static int _inited = 0; \ |
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| 88 | static struct roar_dl_libraryinst lib; \ |
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[5275] | 89 | static struct roar_dl_libraryname libname; \ |
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[4681] | 90 | (void)para; \ |
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[3308] | 91 | if ( _inited ) \ |
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| 92 | return &lib; \ |
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[5501] | 93 | if ( para != NULL && \ |
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| 94 | (para->version != ROAR_DL_LIBPARA_VERSION || \ |
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| 95 | para->len < sizeof(struct roar_dl_librarypara)) ) { \ |
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[5512] | 96 | /* we should set ROAR_ERROR_NSVERSION here but can not */ \ |
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| 97 | /* because that would require the plugin to be linked */ \ |
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| 98 | /* aginst libroar */ \ |
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[5501] | 99 | return NULL; \ |
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| 100 | } \ |
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[3308] | 101 | memset(&lib, 0, sizeof(lib)); \ |
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| 102 | lib.version = ROAR_DL_LIBINST_VERSION; \ |
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| 103 | lib.len = sizeof(lib); \ |
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[5275] | 104 | memset(&libname, 0, sizeof(libname)); \ |
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| 105 | libname.version = ROAR_DL_LIBNAME_VERSION; \ |
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| 106 | libname.len = sizeof(libname); \ |
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| 107 | libname.name = #xlib; \ |
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| 108 | lib.libname = &libname; \ |
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[3308] | 109 | do |
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| 110 | |
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| 111 | #define ROAR_DL_PLUGIN_END while(0); \ |
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| 112 | _inited = 1; \ |
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| 113 | return &lib; \ |
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| 114 | } |
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| 115 | |
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[5335] | 116 | // general stuff: |
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[5275] | 117 | #define ROAR_DL_PLUGIN_ABORT_LOADING(err) roar_err_set((err)); return NULL |
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[5453] | 118 | #define ROAR_DL_PLUGIN_CHECK_VERSIONS(app,abi) (((lib.host_appname = (app)) != NULL) | \ |
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| 119 | ((lib.host_abiversion = (abi)) != NULL) ) |
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[5353] | 120 | // should we keep this macro at all? Is it helpfull at all? |
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| 121 | // if a plugin can handle multiple hosts it needs to call roar_dl_para_check_version() itself anyway. |
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| 122 | #define ROAR_DL_PLUGIN_CHECK_VERSIONS_NOW(app,abi) if ( roar_dl_para_check_version(para, (app), (abi)) == -1 ) return NULL |
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[5335] | 123 | |
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| 124 | // register stuff: |
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[3363] | 125 | #define ROAR_DL_PLUGIN_REG(fn, funcptr) (lib.func[(fn)] = (funcptr)) |
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[3360] | 126 | #define ROAR_DL_PLUGIN_REG_UNLOAD(func) (lib.unload = (func)) |
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[5317] | 127 | #define ROAR_DL_PLUGIN_REG_APPSCHED(sched) (lib.appsched = (sched)) |
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[5313] | 128 | #define ROAR_DL_PLUGIN_REG_GLOBAL_DATA(ptr,init) lib.global_data_len = sizeof((init)); \ |
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| 129 | lib.global_data_init = &(init); \ |
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| 130 | lib.global_data_pointer = (void*)&(ptr) |
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[5353] | 131 | #define ROAR_DL_PLUGIN_REG_LIBDEP(deps) (((lib.libdep = (deps)) == NULL) ? \ |
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[5347] | 132 | (ssize_t)-1 : \ |
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[5353] | 133 | (ssize_t)(lib.libdep_len = sizeof((deps))/sizeof(struct roar_dl_librarydep))) |
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[3314] | 134 | |
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[5335] | 135 | // meta data stuff: |
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| 136 | #define ROAR_DL_PLUGIN_META_PRODUCT(x) (libname.libname = (x)) |
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| 137 | #define ROAR_DL_PLUGIN_META_PRODUCT_NV(name,vendor) ROAR_DL_PLUGIN_META_PRODUCT(name " <" vendor ">") |
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[5338] | 138 | #define ROAR_DL_PLUGIN_META_PRODUCT_NIV_REAL(name,id,vendor) ROAR_DL_PLUGIN_META_PRODUCT(name " <" #id "/" vendor ">") |
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| 139 | #define ROAR_DL_PLUGIN_META_PRODUCT_NIV(name,id,vendor) ROAR_DL_PLUGIN_META_PRODUCT_NIV_REAL(name,id,vendor) |
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[5335] | 140 | #define ROAR_DL_PLUGIN_META_VERSION(x) (libname.libversion = (x)) |
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| 141 | #define ROAR_DL_PLUGIN_META_ABI(x) (libname.abiversion = (x)) |
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| 142 | #define ROAR_DL_PLUGIN_META_DESC(x) (libname.description = (x)) |
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| 143 | #define ROAR_DL_PLUGIN_META_CONTACT(x) (libname.contact = (x)) |
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| 144 | #define ROAR_DL_PLUGIN_META_CONTACT_FL(first,last) ROAR_DL_PLUGIN_META_CONTACT(first " " last) |
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| 145 | #define ROAR_DL_PLUGIN_META_CONTACT_FLE(first,last,email) ROAR_DL_PLUGIN_META_CONTACT(first " " last " <" email ">") |
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| 146 | #define ROAR_DL_PLUGIN_META_CONTACT_FLNE(first,last,nick,email) ROAR_DL_PLUGIN_META_CONTACT(first " \"" nick "\" " last " <" email ">") |
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| 147 | #define ROAR_DL_PLUGIN_META_AUTHORS(x) (libname.authors = (x)) |
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| 148 | #define ROAR_DL_PLUGIN_META_LICENSE(x) (libname.license = (x)) |
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| 149 | #define ROAR_DL_PLUGIN_META_LICENSE_TAG(x) ROAR_DL_PLUGIN_META_LICENSE(ROAR_LICENSE_ ## x) |
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| 150 | |
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[5322] | 151 | enum roar_dl_loadercmd { |
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[5327] | 152 | ROAR_DL_LOADER_NOOP = 0, |
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| 153 | ROAR_DL_LOADER_PRELOAD, |
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| 154 | ROAR_DL_LOADER_LOAD, |
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| 155 | ROAR_DL_LOADER_POSTLOAD, |
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| 156 | ROAR_DL_LOADER_PREUNLOAD, |
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| 157 | ROAR_DL_LOADER_UNLOAD, |
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| 158 | ROAR_DL_LOADER_POSTUNLOAD |
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[5322] | 159 | }; |
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| 160 | |
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[5335] | 161 | struct roar_plugincontainer; |
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| 162 | |
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[3297] | 163 | struct roar_dl_librarypara { |
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[5275] | 164 | int version; // version of this struct type (must be ROAR_DL_LIBPARA_VERSION) |
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| 165 | size_t len; // Length of this struct type (must be sizeof(struct roar_dl_librarypara) |
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| 166 | |
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| 167 | size_t refc; // Reference counter. |
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| 168 | |
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| 169 | size_t argc; // number of elements in argv |
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| 170 | struct roar_keyval * argv; // Parameter for the plugin |
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| 171 | void * args_store; // Storage area for argv's data. |
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| 172 | // If not NULL this and argv will be freed. |
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| 173 | // If NULL argv will be left untouched. |
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| 174 | |
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| 175 | void * binargv; // A pointer with binary data arguments. |
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| 176 | // This can be used to pass any non-string data to |
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| 177 | // the plugin. Normally this is NULL or the pointer |
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| 178 | // to a struct with members of whatever is needed. |
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| 179 | |
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| 180 | const char * appname; // application name in common format: |
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| 181 | // Product/Version <VendorID/VendorName> (comments) |
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| 182 | // Version and comment are optional and should be avoided. |
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| 183 | // When no vendor ID is registered use <VendorName>. |
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| 184 | // The VendorName MUST NOT contain a slash and SHOULD |
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| 185 | // be as unique as possible. |
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| 186 | // Examples: roard <0/RoarAudio>, MyAPP <myapp.org>, |
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| 187 | // AnAPP <Musterman GbR> |
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| 188 | const char * abiversion; // The ABI version. For libraries this should be the SONAME. |
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| 189 | // For applications this should be the version of the release |
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| 190 | // which introduced the current ABI. |
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| 191 | // Examples: libroar2, 0.5.1 |
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[5317] | 192 | struct roar_notify_core * notifycore; |
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[5335] | 193 | struct roar_plugincontainer * container; |
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| 194 | int (*loader)(struct roar_dl_librarypara * lhandle, void * loader_userdata, enum roar_dl_loadercmd cmd, void * argp); |
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| 195 | void * loader_userdata; |
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[5275] | 196 | }; |
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| 197 | |
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| 198 | struct roar_dl_libraryname { |
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| 199 | int version; |
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| 200 | size_t len; |
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| 201 | const char * name; //Format: shortname |
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[5317] | 202 | const char * libname; //This is the same as appname in struct roar_dl_librarypara. |
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| 203 | //Format: Product <VendorID/VendorName> (comments) |
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| 204 | const char * libversion; //This is the pure version number of the library. |
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| 205 | const char * abiversion; //This is the same as abiversion in struct roar_dl_librarypara. |
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| 206 | //Format: Version |
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[5275] | 207 | const char * description; //Free form. |
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| 208 | const char * contact; //Format: first ["']nick["'] last (comment) <email>/OpenPGPkey/Phone/Room |
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| 209 | const char * authors; //Other authors as free form. |
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| 210 | const char * license; //Format: LicenseName-Version (options) |
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| 211 | //Examples: GPL-3.0, LGPL-2.1, LGPL-3.0 (or later). |
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[3297] | 212 | }; |
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| 213 | |
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[5317] | 214 | struct roar_dl_librarydep { |
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| 215 | int version; |
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| 216 | size_t len; |
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[5335] | 217 | uint32_t flags; |
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[5317] | 218 | const char * name; |
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| 219 | const char * libname; |
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| 220 | const char * abiversion; |
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| 221 | }; |
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| 222 | |
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[5347] | 223 | #define ROAR_DL_DEP(__flags,__name,__libname,__abiversion) \ |
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| 224 | {.version = ROAR_DL_LIBDEP_VERSION, \ |
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| 225 | .len = sizeof(struct roar_dl_librarydep), \ |
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| 226 | .flags = __flags, \ |
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| 227 | .name = __name, \ |
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| 228 | .libname = __libname, \ |
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| 229 | .abiversion = __abiversion} |
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| 230 | |
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[3297] | 231 | struct roar_dl_libraryinst { |
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[3299] | 232 | int version; |
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| 233 | size_t len; |
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[3301] | 234 | int (*unload)(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib); |
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[3299] | 235 | int (*func[ROAR_DL_FN_MAX])(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib); |
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[5275] | 236 | struct roar_dl_libraryname * libname; |
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[5312] | 237 | size_t global_data_len; |
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| 238 | void * global_data_init; |
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| 239 | void ** global_data_pointer; |
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[5317] | 240 | struct roar_dl_librarydep * libdep; |
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| 241 | size_t libdep_len; |
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| 242 | struct roar_dl_appsched * appsched; |
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[5353] | 243 | const char * host_appname; |
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| 244 | const char * host_abiversion; |
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[3297] | 245 | }; |
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| 246 | |
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[5313] | 247 | struct roar_dl_appsched { |
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[5317] | 248 | int (*init) (struct roar_dl_librarypara * para); |
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| 249 | int (*free) (struct roar_dl_librarypara * para); |
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| 250 | int (*update)(struct roar_dl_librarypara * para); |
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[5335] | 251 | int (*tick) (struct roar_dl_librarypara * para); |
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| 252 | int (*wait) (struct roar_dl_librarypara * para); |
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[5317] | 253 | }; |
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| 254 | |
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| 255 | enum roar_dl_appsched_trigger { |
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| 256 | ROAR_DL_APPSCHED_INIT = 1, |
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| 257 | #define ROAR_DL_APPSCHED_INIT ROAR_DL_APPSCHED_INIT |
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| 258 | ROAR_DL_APPSCHED_FREE, |
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| 259 | #define ROAR_DL_APPSCHED_FREE ROAR_DL_APPSCHED_FREE |
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[5335] | 260 | ROAR_DL_APPSCHED_UPDATE, |
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[5317] | 261 | #define ROAR_DL_APPSCHED_UPDATE ROAR_DL_APPSCHED_UPDATE |
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[5335] | 262 | ROAR_DL_APPSCHED_TICK, |
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| 263 | #define ROAR_DL_APPSCHED_TICK ROAR_DL_APPSCHED_TICK |
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| 264 | ROAR_DL_APPSCHED_WAIT |
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| 265 | #define ROAR_DL_APPSCHED_WAIT ROAR_DL_APPSCHED_WAIT |
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[5313] | 266 | }; |
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| 267 | |
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[5312] | 268 | // parameter functions: |
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[5275] | 269 | struct roar_dl_librarypara * roar_dl_para_new(const char * args, void * binargv, |
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| 270 | const char * appname, const char * abiversion); |
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| 271 | int roar_dl_para_ref (struct roar_dl_librarypara * para); |
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| 272 | int roar_dl_para_unref (struct roar_dl_librarypara * para); |
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| 273 | int roar_dl_para_check_version (struct roar_dl_librarypara * para, |
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| 274 | const char * appname, const char * abiversion); |
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| 275 | |
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[5312] | 276 | // 'core' dynamic loader functions. |
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[5275] | 277 | struct roar_dl_lhandle * roar_dl_open (const char * filename, int flags, |
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| 278 | int ra_init, struct roar_dl_librarypara * para); |
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[5321] | 279 | int roar_dl_ref (struct roar_dl_lhandle * lhandle); |
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| 280 | int roar_dl_unref (struct roar_dl_lhandle * lhandle); |
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| 281 | #define roar_dl_close(x) roar_dl_unref((x)) |
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[3301] | 282 | |
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[5275] | 283 | void * roar_dl_getsym (struct roar_dl_lhandle * lhandle, const char * sym, int type); |
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[3297] | 284 | |
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[5275] | 285 | int roar_dl_ra_init(struct roar_dl_lhandle * lhandle, |
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| 286 | const char * prefix, |
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| 287 | struct roar_dl_librarypara * para); |
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[3297] | 288 | |
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[5275] | 289 | const char * roar_dl_errstr (struct roar_dl_lhandle * lhandle); |
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[3297] | 290 | |
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[5312] | 291 | // getting meta data: |
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[5275] | 292 | struct roar_dl_librarypara * roar_dl_getpara(struct roar_dl_lhandle * lhandle); |
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| 293 | const struct roar_dl_libraryname * roar_dl_getlibname(struct roar_dl_lhandle * lhandle); |
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[3364] | 294 | |
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[5312] | 295 | // context switching: |
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| 296 | // _restore() is to switch from main to library context. _store() is to store library context |
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| 297 | // and switch back to main context. |
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| 298 | int roar_dl_context_restore(struct roar_dl_lhandle * lhandle); |
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| 299 | int roar_dl_context_store(struct roar_dl_lhandle * lhandle); |
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| 300 | |
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[5317] | 301 | // appsched: |
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| 302 | int roar_dl_appsched_trigger(struct roar_dl_lhandle * lhandle, enum roar_dl_appsched_trigger trigger); |
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| 303 | |
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[5511] | 304 | // FN Registration: |
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| 305 | |
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| 306 | // Actions objects can emit: |
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| 307 | enum roar_dl_fnreg_action { |
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| 308 | ROAR_DL_FNREG = 1, // The object is been registered |
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| 309 | ROAR_DL_FNUNREG = 2 // The object is been unregistered |
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| 310 | }; |
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| 311 | |
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| 312 | // Callback for registering/unregistering objects: |
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| 313 | struct roar_dl_fnreg { |
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| 314 | int fn; // Filter: The FN of the registering object or -1 for any. |
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| 315 | int subtype; // Filter: The subtype of the registering object or -1 for any. |
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| 316 | int version; // Filter: The version of the registering object or -1 for any. |
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| 317 | int (*callback)( // Callback to call on register/unregister. |
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| 318 | enum roar_dl_fnreg_action action, // The action happening |
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| 319 | int fn, // The FN of the object |
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| 320 | int subtype, // The subtype of the object |
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| 321 | const void * object, // Pointer to the object |
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| 322 | size_t objectlen, // Length of the object |
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| 323 | int version, // Version of the object |
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| 324 | int options, // Object Options. |
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| 325 | void * userdata, // User data for the callback. |
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| 326 | struct roar_dl_lhandle * lhandle // The registering handle. |
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| 327 | // This is valid until the object is unregistered. |
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| 328 | // Only roar_dl_context_restore() and roar_dl_context_store() |
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| 329 | // may be used on this object. Result of all other functions |
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| 330 | // is undefined. |
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| 331 | ); |
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| 332 | void * userdata; // The user data pointer passed to the callback. |
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| 333 | }; |
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| 334 | |
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| 335 | // Parameters for FNREG registration: |
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| 336 | #define ROAR_DL_FNREG_SUBTYPE 0 |
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| 337 | #define ROAR_DL_FNREG_VERSION 0 |
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| 338 | #define ROAR_DL_FNREG_SIZE sizeof(struct roar_dl_fnreg) |
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| 339 | |
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| 340 | |
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| 341 | // Reg FN: |
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| 342 | |
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| 343 | // Options: |
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| 344 | #define ROAR_DL_FNREG_OPT_NONE 0 /* no options */ |
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| 345 | |
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| 346 | // Register an FN. |
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| 347 | int roar_dl_register_fn(struct roar_dl_lhandle * lhandle, int fn, int subtype, const void * object, size_t objectlen, int version, int options); |
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| 348 | |
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| 349 | // Unregister FN for the given plugin. |
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| 350 | // This should not be called directly and is called internally when needed. |
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| 351 | int roar_dl_unregister_fn(struct roar_dl_lhandle * lhandle); |
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| 352 | |
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[3297] | 353 | #endif |
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| 354 | |
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| 355 | //ll |
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