include/babeltrace/graph/notification-internal.h

   1 #ifndef BABELTRACE_GRAPH_NOTIFICATION_NOTIFICATION_INTERNAL_H
   2 #define BABELTRACE_GRAPH_NOTIFICATION_NOTIFICATION_INTERNAL_H
   3
   4 /*
   5  * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   6  *
   7  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25  * SOFTWARE.
  26  */
  27
  28 #include <babeltrace/babeltrace-internal.h>
  29 #include <babeltrace/object-internal.h>
  30 #include <babeltrace/assert-internal.h>
  31 #include <babeltrace/graph/graph.h>
  32 #include <babeltrace/graph/notification.h>
  33 #include <babeltrace/trace-ir/stream.h>
  34 #include <babeltrace/object-pool-internal.h>
  35 #include <babeltrace/types.h>
  36
  37 typedef struct bt_stream *(*get_stream_func)(
  38                 struct bt_notification *notification);
  39
  40 struct bt_notification {
  41         struct bt_object base;
  42         enum bt_notification_type type;
  43         uint64_t seq_num;
  44         bt_bool frozen;
  45
  46         /* Owned by this; keeps the graph alive while the notif. is alive */
  47         struct bt_graph *graph;
  48 };
  49
  50 #define BT_ASSERT_PRE_NOTIF_IS_TYPE(_notif, _type)                      \
  51         BT_ASSERT_PRE(((struct bt_notification *) (_notif))->type == (_type), \
  52                 "Notification has the wrong type: expected-type=%s, "   \
  53                 "%![notif-]+n", bt_notification_type_string(_type),     \
  54                 (_notif))
  55
  56 BT_HIDDEN
  57 void bt_notification_init(struct bt_notification *notification,
  58                 enum bt_notification_type type,
  59                 bt_object_release_func release,
  60                 struct bt_graph *graph);
  61
  62 static inline
  63 void bt_notification_reset(struct bt_notification *notification)
  64 {
  65         BT_ASSERT(notification);
  66
  67 #ifdef BT_DEV_MODE
  68         notification->frozen = BT_FALSE;
  69         notification->seq_num = UINT64_C(-1);
  70 #endif
  71 }
  72
  73 static inline
  74 struct bt_notification *bt_notification_create_from_pool(
  75                 struct bt_object_pool *pool, struct bt_graph *graph)
  76 {
  77         struct bt_notification *notif = bt_object_pool_create_object(pool);
  78
  79         if (unlikely(!notif)) {
  80 #ifdef BT_LIB_LOGE
  81                 BT_LIB_LOGE("Cannot allocate one notification from notification pool: "
  82                         "%![pool-]+o, %![graph-]+g", pool, graph);
  83 #endif
  84                 goto error;
  85         }
  86
  87         if (likely(!notif->graph)) {
  88                 notif->graph = graph;
  89         }
  90
  91         goto end;
  92
  93 error:
  94         BT_ASSERT(!notif);
  95
  96 end:
  97         return notif;
  98 }
  99
 100 static inline void _bt_notification_freeze(struct bt_notification *notification)
 101 {
 102         notification->frozen = BT_TRUE;
 103 }
 104
 105 BT_HIDDEN
 106 void bt_notification_unlink_graph(struct bt_notification *notif);
 107
 108 #ifdef BT_DEV_MODE
 109 # define bt_notification_freeze         _bt_notification_freeze
 110 #else
 111 # define bt_notification_freeze(_x)
 112 #endif /* BT_DEV_MODE */
 113
 114 static inline
 115 const char *bt_notification_type_string(enum bt_notification_type type)
 116 {
 117         switch (type) {
 118         case BT_NOTIFICATION_TYPE_EVENT:
 119                 return "BT_NOTIFICATION_TYPE_EVENT";
 120         case BT_NOTIFICATION_TYPE_INACTIVITY:
 121                 return "BT_NOTIFICATION_TYPE_INACTIVITY";
 122         case BT_NOTIFICATION_TYPE_STREAM_BEGIN:
 123                 return "BT_NOTIFICATION_TYPE_STREAM_BEGIN";
 124         case BT_NOTIFICATION_TYPE_STREAM_END:
 125                 return "BT_NOTIFICATION_TYPE_STREAM_END";
 126         case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
 127                 return "BT_NOTIFICATION_TYPE_PACKET_BEGIN";
 128         case BT_NOTIFICATION_TYPE_PACKET_END:
 129                 return "BT_NOTIFICATION_TYPE_PACKET_END";
 130         default:
 131                 return "(unknown)";
 132         }
 133 }
 134
 135 #endif /* BABELTRACE_GRAPH_NOTIFICATION_NOTIFICATION_INTERNAL_H */