src/lib/graph/message/message.h

   1 #ifndef BABELTRACE_GRAPH_MESSAGE_MESSAGE_INTERNAL_H
   2 #define BABELTRACE_GRAPH_MESSAGE_MESSAGE_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 "common/macros.h"
  28 #include "lib/object.h"
  29 #include "common/assert.h"
  30 #include <babeltrace2/graph/graph.h>
  31 #include <babeltrace2/graph/message-const.h>
  32 #include <babeltrace2/trace-ir/stream.h>
  33 #include "lib/object-pool.h"
  34 #include <babeltrace2/types.h>
  35
  36 /* Protection: this file uses BT_LIB_LOG*() macros directly */
  37 #ifndef BT_LIB_LOG_SUPPORTED
  38 # error Please include "lib/logging.h" before including this file.
  39 #endif
  40
  41 typedef struct bt_stream *(*get_stream_func)(
  42                 struct bt_message *message);
  43
  44 struct bt_message {
  45         struct bt_object base;
  46         enum bt_message_type type;
  47         bt_bool frozen;
  48
  49         /* Owned by this; keeps the graph alive while the msg. is alive */
  50         struct bt_graph *graph;
  51 };
  52
  53 #define BT_ASSERT_PRE_MSG_IS_TYPE(_msg, _type)                  \
  54         BT_ASSERT_PRE(((struct bt_message *) (_msg))->type == (_type), \
  55                 "Message has the wrong type: expected-type=%s, "        \
  56                 "%![msg-]+n", bt_message_type_string(_type),    \
  57                 (_msg))
  58
  59 BT_HIDDEN
  60 void bt_message_init(struct bt_message *message,
  61                 enum bt_message_type type,
  62                 bt_object_release_func release,
  63                 struct bt_graph *graph);
  64
  65 static inline
  66 void bt_message_reset(struct bt_message *message)
  67 {
  68         BT_ASSERT(message);
  69
  70 #ifdef BT_DEV_MODE
  71         message->frozen = BT_FALSE;
  72 #endif
  73 }
  74
  75 static inline
  76 struct bt_message *bt_message_create_from_pool(
  77                 struct bt_object_pool *pool, struct bt_graph *graph)
  78 {
  79         struct bt_message *msg = bt_object_pool_create_object(pool);
  80
  81         if (G_UNLIKELY(!msg)) {
  82                 BT_LIB_LOGE("Cannot allocate one message from message pool: "
  83                         "%![pool-]+o, %![graph-]+g", pool, graph);
  84                 goto error;
  85         }
  86
  87         if (G_LIKELY(!msg->graph)) {
  88                 msg->graph = graph;
  89         }
  90
  91         goto end;
  92
  93 error:
  94         BT_ASSERT(!msg);
  95
  96 end:
  97         return msg;
  98 }
  99
 100 static inline void _bt_message_freeze(struct bt_message *message)
 101 {
 102         message->frozen = BT_TRUE;
 103 }
 104
 105 BT_HIDDEN
 106 void bt_message_unlink_graph(struct bt_message *msg);
 107
 108 #ifdef BT_DEV_MODE
 109 # define bt_message_freeze              _bt_message_freeze
 110 #else
 111 # define bt_message_freeze(_x)
 112 #endif /* BT_DEV_MODE */
 113
 114 static inline
 115 const char *bt_message_type_string(enum bt_message_type type)
 116 {
 117         switch (type) {
 118         case BT_MESSAGE_TYPE_EVENT:
 119                 return "BT_MESSAGE_TYPE_EVENT";
 120         case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY:
 121                 return "BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY";
 122         case BT_MESSAGE_TYPE_STREAM_BEGINNING:
 123                 return "BT_MESSAGE_TYPE_STREAM_BEGINNING";
 124         case BT_MESSAGE_TYPE_STREAM_END:
 125                 return "BT_MESSAGE_TYPE_STREAM_END";
 126         case BT_MESSAGE_TYPE_PACKET_BEGINNING:
 127                 return "BT_MESSAGE_TYPE_PACKET_BEGINNING";
 128         case BT_MESSAGE_TYPE_PACKET_END:
 129                 return "BT_MESSAGE_TYPE_PACKET_END";
 130         case BT_MESSAGE_TYPE_STREAM_ACTIVITY_BEGINNING:
 131                 return "BT_MESSAGE_TYPE_STREAM_ACTIVITY_BEGINNING";
 132         case BT_MESSAGE_TYPE_STREAM_ACTIVITY_END:
 133                 return "BT_MESSAGE_TYPE_STREAM_ACTIVITY_END";
 134         case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
 135                 return "BT_MESSAGE_TYPE_DISCARDED_EVENTS";
 136         default:
 137                 return "(unknown)";
 138         }
 139 }
 140
 141 #endif /* BABELTRACE_GRAPH_MESSAGE_MESSAGE_INTERNAL_H */