include/babeltrace/plugin/component-factory-internal.h

   1 #ifndef BABELTRACE_PLUGIN_COMPONENT_FACTORY_INTERNAL_H
   2 #define BABELTRACE_PLUGIN_COMPONENT_FACTORY_INTERNAL_H
   3
   4 /*
   5  * BabelTrace - Component Factory Internal
   6  *
   7  * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   8  *
   9  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this software and associated documentation files (the "Software"), to deal
  13  * in the Software without restriction, including without limitation the rights
  14  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15  * copies of the Software, and to permit persons to whom the Software is
  16  * furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  26  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  27  * SOFTWARE.
  28  */
  29
  30 #include <babeltrace/babeltrace-internal.h>
  31 #include <babeltrace/object-internal.h>
  32 #include <babeltrace/plugin/component-factory.h>
  33 #include <babeltrace/plugin/component.h>
  34 #include <babeltrace/plugin/component-class-internal.h>
  35 #include <babeltrace/plugin/plugin-system.h>
  36 #include <babeltrace/plugin/plugin.h>
  37 #include <glib.h>
  38
  39 #define SECTION_BEGIN(_name)    &__start_##_name
  40 #define SECTION_END(_name)      &__stop_##_name
  41
  42 #define SECTION_ELEMENT_COUNT(_name) (SECTION_END(_name) - SECTION_BEGIN(_name))
  43
  44 #define DECLARE_SECTION(_type, _name)                           \
  45         extern _type const __start_##_name __attribute((weak)); \
  46         extern _type const __stop_##_name __attribute((weak))
  47
  48 #define DECLARE_PLUG_IN_SECTIONS                                                \
  49         DECLARE_SECTION(bt_plugin_register_func, __plugin_register_funcs);      \
  50         DECLARE_SECTION(const char *, __plugin_names);                          \
  51         DECLARE_SECTION(const char *, __plugin_authors);                        \
  52         DECLARE_SECTION(const char *, __plugin_licenses);                       \
  53         DECLARE_SECTION(const char *, __plugin_descriptions)
  54
  55 #define PRINT_SECTION(_printer, _name)                                  \
  56         _printer("Section " #_name " [%p - %p], (%zu elements)\n",      \
  57         SECTION_BEGIN(_name), SECTION_END(_name), SECTION_ELEMENT_COUNT(_name))
  58
  59 #define PRINT_PLUG_IN_SECTIONS(_printer)                                        \
  60         PRINT_SECTION(_printer, __plugin_register_funcs);                       \
  61         PRINT_SECTION(_printer, __plugin_names);                                \
  62         PRINT_SECTION(_printer, __plugin_authors);                              \
  63         PRINT_SECTION(_printer, __plugin_licenses);                             \
  64         PRINT_SECTION(_printer, __plugin_descriptions)
  65
  66 struct bt_component_factory {
  67         struct bt_object base;
  68         /** Array of pointers to struct bt_component_class */
  69         GPtrArray *component_classes;
  70         /* Plug-in currently registering component classes. Weak ref. */
  71         struct bt_plugin *current_plugin;
  72 };
  73
  74 #endif /* BABELTRACE_PLUGIN_COMPONENT_FACTORY_INTERNAL_H */