include/lttng/notification/channel-internal.h

   1 /*
   2  * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * This library is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU Lesser General Public License, version 2.1 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This library is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
  11  * for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this library; if not, write to the Free Software Foundation,
  15  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16  */
  17
  18 #ifndef LTTNG_NOTIFICATION_CHANNEL_INTERNAL_H
  19 #define LTTNG_NOTIFICATION_CHANNEL_INTERNAL_H
  20
  21 #include <lttng/notification/channel.h>
  22 #include <common/macros.h>
  23 #include <stdint.h>
  24 #include <stdbool.h>
  25
  26 enum lttng_notification_channel_message_type {
  27         LTTNG_NOTIFICATION_CHANNEL_MESSAGE_TYPE_SUBSCRIBE = 0,
  28         LTTNG_NOTIFICATION_CHANNEL_MESSAGE_TYPE_UNSUBSCRIBE = 1,
  29         LTTNG_NOTIFICATION_CHANNEL_MESSAGE_TYPE_COMMAND_REPLY = 2,
  30         LTTNG_NOTIFICATION_CHANNEL_MESSAGE_TYPE_NOTIFICATION = 3,
  31 };
  32
  33 struct lttng_notification_channel_message {
  34         /* enum lttng_notification_channel_message_type */
  35         int8_t type;
  36         /* size of the payload following this field */
  37         uint32_t size;
  38         char payload[];
  39 } LTTNG_PACKED;
  40
  41 struct lttng_notification_channel_command_reply {
  42         /* enum lttng_notification_channel_status */
  43         int8_t status;
  44 } LTTNG_PACKED;
  45
  46 struct lttng_notification_channel {
  47         /* FIXME Add mutex to protect the socket from concurrent uses. */
  48         int socket;
  49 };
  50
  51 #endif /* LTTNG_NOTIFICATION_CHANNEL_INTERNAL_H */