src/plugins/ctf/fs-src/data-stream-file.h

   1 #ifndef CTF_FS_DS_FILE_H
   2 #define CTF_FS_DS_FILE_H
   3
   4 /*
   5  * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdbool.h>
  28 #include <glib.h>
  29 #include "common/macros.h"
  30 #include <babeltrace2/babeltrace.h>
  31
  32 #include "../common/msg-iter/msg-iter.h"
  33 #include "lttng-index.h"
  34
  35 struct ctf_fs_component;
  36 struct ctf_fs_file;
  37 struct ctf_fs_trace;
  38 struct ctf_fs_ds_file;
  39
  40 struct ctf_fs_ds_file_info {
  41         /* Owned by this. */
  42         GString *path;
  43
  44         /* Guaranteed to be set, as opposed to the index. */
  45         int64_t begin_ns;
  46 };
  47
  48 struct ctf_fs_metadata;
  49
  50 struct ctf_fs_ds_file {
  51         bt_logging_level log_level;
  52
  53         /* Weak */
  54         bt_self_component *self_comp;
  55
  56         /* Weak */
  57         struct ctf_fs_metadata *metadata;
  58
  59         /* Weak */
  60         bt_self_message_iterator *pc_msg_iter;
  61
  62         /* Owned by this */
  63         struct ctf_fs_file *file;
  64
  65         /* Owned by this */
  66         bt_stream *stream;
  67
  68         /* Weak */
  69         struct bt_msg_iter *msg_iter;
  70
  71         void *mmap_addr;
  72
  73         /*
  74          * Max length of chunk to mmap() when updating the current mapping.
  75          * This value must be page-aligned.
  76          */
  77         size_t mmap_max_len;
  78
  79         /* Length of the current mapping. Never exceeds the file's length. */
  80         size_t mmap_len;
  81
  82         /* Offset in the file where the current mapping starts. */
  83         off_t mmap_offset;
  84
  85         /*
  86          * Offset, in the current mapping, of the address to return on the next
  87          * request.
  88          */
  89         off_t request_offset;
  90
  91         bool end_reached;
  92 };
  93
  94 BT_HIDDEN
  95 struct ctf_fs_ds_file *ctf_fs_ds_file_create(
  96                 struct ctf_fs_trace *ctf_fs_trace,
  97                 bt_self_message_iterator *pc_msg_iter,
  98                 struct bt_msg_iter *msg_iter,
  99                 bt_stream *stream, const char *path,
 100                 bt_logging_level log_level);
 101
 102 BT_HIDDEN
 103 void ctf_fs_ds_file_destroy(struct ctf_fs_ds_file *stream);
 104
 105 BT_HIDDEN
 106 bt_component_class_message_iterator_next_method_status ctf_fs_ds_file_next(
 107                 struct ctf_fs_ds_file *ds_file,
 108                 bt_message **msg);
 109
 110 BT_HIDDEN
 111 struct ctf_fs_ds_index *ctf_fs_ds_file_build_index(
 112                 struct ctf_fs_ds_file *ds_file,
 113                 struct ctf_fs_ds_file_info *ds_file_info);
 114
 115 BT_HIDDEN
 116 struct ctf_fs_ds_index *ctf_fs_ds_index_create(bt_logging_level log_level,
 117                 bt_self_component *self_comp);
 118
 119 BT_HIDDEN
 120 void ctf_fs_ds_index_destroy(struct ctf_fs_ds_index *index);
 121
 122 extern struct bt_msg_iter_medium_ops ctf_fs_ds_file_medops;
 123
 124 #endif /* CTF_FS_DS_FILE_H */