src/plugins/ctf/fs-sink/fs-sink-trace.hpp

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2019 Philippe Proulx <pproulx@efficios.com>
   5  */
   6
   7 #ifndef BABELTRACE_PLUGIN_CTF_FS_SINK_FS_SINK_TRACE_H
   8 #define BABELTRACE_PLUGIN_CTF_FS_SINK_FS_SINK_TRACE_H
   9
  10 #include "common/macros.h"
  11 #include <babeltrace2/babeltrace.h>
  12 #include "ctfser/ctfser.h"
  13 #include <glib.h>
  14 #include <stdint.h>
  15
  16 #include "fs-sink-ctf-meta.hpp"
  17
  18 struct fs_sink_comp;
  19
  20 struct fs_sink_trace
  21 {
  22     bt_logging_level log_level;
  23     struct fs_sink_comp *fs_sink;
  24
  25     /* Owned by this */
  26     struct fs_sink_ctf_trace *trace;
  27
  28     /*
  29      * Weak reference: this object does not own it, and `trace`
  30      * above does not own its trace IR trace and trace class either.
  31      * Instead, we add a "trace destruction" listener (in
  32      * create_trace()) so that this object gets destroyed when the
  33      * trace object is destroyed.
  34      *
  35      * Otherwise (with a strong reference), we would keep this trace
  36      * object alive until the upstream message iterator ends. This
  37      * could "leak" resources (memory, file descriptors) associated
  38      * to traces and streams which otherwise would not exist.
  39      */
  40     const bt_trace *ir_trace;
  41
  42     bt_listener_id ir_trace_destruction_listener_id;
  43
  44     /* Trace's directory */
  45     GString *path;
  46
  47     /* `metadata` file path */
  48     GString *metadata_path;
  49
  50     /*
  51      * Hash table of `const bt_stream *` (weak) to
  52      * `struct fs_sink_stream *` (owned by hash table).
  53      */
  54     GHashTable *streams;
  55 };
  56
  57 BT_HIDDEN
  58 struct fs_sink_trace *fs_sink_trace_create(struct fs_sink_comp *fs_sink, const bt_trace *ir_trace);
  59
  60 BT_HIDDEN
  61 void fs_sink_trace_destroy(struct fs_sink_trace *trace);
  62
  63 #endif /* BABELTRACE_PLUGIN_CTF_FS_SINK_FS_SINK_TRACE_H */