include/babeltrace/graph/component-internal.h

   1 #ifndef BABELTRACE_GRAPH_COMPONENT_INTERNAL_H
   2 #define BABELTRACE_GRAPH_COMPONENT_INTERNAL_H
   3
   4 /*
   5  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   6  * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 #include <babeltrace/babeltrace-internal.h>
  28 #include <babeltrace/graph/component-const.h>
  29 #include <babeltrace/graph/component-class-internal.h>
  30 #include <babeltrace/graph/port-internal.h>
  31 #include <babeltrace/object-internal.h>
  32 #include <babeltrace/types.h>
  33 #include <babeltrace/assert-internal.h>
  34 #include <glib.h>
  35 #include <stdio.h>
  36
  37 typedef void (*bt_component_destroy_listener_func)(
  38                 struct bt_component *class, void *data);
  39
  40 struct bt_component_destroy_listener {
  41         bt_component_destroy_listener_func func;
  42         void *data;
  43 };
  44
  45 struct bt_graph;
  46
  47 struct bt_component {
  48         struct bt_object base;
  49         struct bt_component_class *class;
  50         GString *name;
  51
  52         /*
  53          * Internal destroy function specific to a source, filter, or
  54          * sink component object.
  55          */
  56         void (*destroy)(struct bt_component *);
  57
  58         /* User-defined data */
  59         void *user_data;
  60
  61         /* Input and output ports (weak references) */
  62         GPtrArray *input_ports;
  63         GPtrArray *output_ports;
  64
  65         /* Array of struct bt_component_destroy_listener */
  66         GArray *destroy_listeners;
  67
  68         bool initialized;
  69 };
  70
  71 static inline
  72 struct bt_graph *bt_component_borrow_graph(struct bt_component *comp)
  73 {
  74         BT_ASSERT(comp);
  75         return (void *) bt_object_borrow_parent(&comp->base);
  76 }
  77
  78 BT_HIDDEN
  79 int bt_component_create(struct bt_component_class *component_class,
  80                 const char *name, struct bt_component **component);
  81
  82 BT_HIDDEN
  83 enum bt_self_component_status bt_component_accept_port_connection(
  84                 struct bt_component *component, struct bt_port *self_port,
  85                 struct bt_port *other_port);
  86
  87 BT_HIDDEN
  88 enum bt_self_component_status bt_component_port_connected(
  89                 struct bt_component *comp,
  90                 struct bt_port *self_port, struct bt_port *other_port);
  91
  92 BT_HIDDEN
  93 void bt_component_set_graph(struct bt_component *component,
  94                 struct bt_graph *graph);
  95
  96 BT_HIDDEN
  97 uint64_t bt_component_get_input_port_count(const struct bt_component *comp);
  98
  99 BT_HIDDEN
 100 uint64_t bt_component_get_output_port_count(const struct bt_component *comp);
 101
 102 BT_HIDDEN
 103 struct bt_port_input *bt_component_borrow_input_port_by_index(
 104                 struct bt_component *comp, uint64_t index);
 105
 106 BT_HIDDEN
 107 struct bt_port_output *bt_component_borrow_output_port_by_index(
 108                 struct bt_component *comp, uint64_t index);
 109
 110 BT_HIDDEN
 111 struct bt_port_input *bt_component_borrow_input_port_by_name(
 112                 struct bt_component *comp, const char *name);
 113
 114 BT_HIDDEN
 115 struct bt_port_output *bt_component_borrow_output_port_by_name(
 116                 struct bt_component *comp, const char *name);
 117
 118 BT_HIDDEN
 119 struct bt_port_input *bt_component_add_input_port(
 120                 struct bt_component *component, const char *name,
 121                 void *user_data);
 122
 123 BT_HIDDEN
 124 struct bt_port_output *bt_component_add_output_port(
 125                 struct bt_component *component, const char *name,
 126                 void *user_data);
 127
 128 BT_HIDDEN
 129 void bt_component_remove_port(struct bt_component *component,
 130                 struct bt_port *port);
 131
 132 BT_HIDDEN
 133 void bt_component_add_destroy_listener(struct bt_component *component,
 134                 bt_component_destroy_listener_func func, void *data);
 135
 136 BT_HIDDEN
 137 void bt_component_remove_destroy_listener(struct bt_component *component,
 138                 bt_component_destroy_listener_func func, void *data);
 139
 140 static inline
 141 const char *bt_self_component_status_string(
 142                 enum bt_self_component_status status)
 143 {
 144         switch (status) {
 145         case BT_SELF_COMPONENT_STATUS_OK:
 146                 return "BT_SELF_COMPONENT_STATUS_OK";
 147         case BT_SELF_COMPONENT_STATUS_END:
 148                 return "BT_SELF_COMPONENT_STATUS_END";
 149         case BT_SELF_COMPONENT_STATUS_AGAIN:
 150                 return "BT_SELF_COMPONENT_STATUS_AGAIN";
 151         case BT_SELF_COMPONENT_STATUS_REFUSE_PORT_CONNECTION:
 152                 return "BT_SELF_COMPONENT_STATUS_REFUSE_PORT_CONNECTION";
 153         case BT_SELF_COMPONENT_STATUS_ERROR:
 154                 return "BT_SELF_COMPONENT_STATUS_ERROR";
 155         case BT_SELF_COMPONENT_STATUS_NOMEM:
 156                 return "BT_SELF_COMPONENT_STATUS_NOMEM";
 157         default:
 158                 return "(unknown)";
 159         }
 160 }
 161
 162 #endif /* BABELTRACE_GRAPH_COMPONENT_INTERNAL_H */