formats/bt-dummy/bt-dummy.c

   1 /*
   2  * BabelTrace - Dummy Output
   3  *
   4  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
   5  *
   6  * Author: Mathieu Desnoyers <mathieu.desnoyers@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
  19 #include <babeltrace/ctf-text/types.h>
  20 #include <babeltrace/format.h>
  21 #include <babeltrace/babeltrace-internal.h>
  22 #include <inttypes.h>
  23 #include <sys/mman.h>
  24 #include <errno.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <dirent.h>
  29 #include <glib.h>
  30 #include <unistd.h>
  31 #include <stdlib.h>
  32
  33 static
  34 int bt_dummy_write_event(struct stream_pos *ppos, struct ctf_stream *stream)
  35 {
  36         return 0;
  37 }
  38
  39 static
  40 struct trace_descriptor *bt_dummy_open_trace(const char *path, int flags,
  41                 void (*packet_seek)(struct stream_pos *pos, size_t index,
  42                         int whence), FILE *metadata_fp)
  43 {
  44         struct ctf_text_stream_pos *pos;
  45
  46         pos = g_new0(struct ctf_text_stream_pos, 1);
  47         pos->parent.rw_table = NULL;
  48         pos->parent.event_cb = bt_dummy_write_event;
  49         return &pos->trace_descriptor;
  50 }
  51
  52 static
  53 void bt_dummy_close_trace(struct trace_descriptor *td)
  54 {
  55         struct ctf_text_stream_pos *pos =
  56                 container_of(td, struct ctf_text_stream_pos,
  57                         trace_descriptor);
  58         free(pos);
  59 }
  60
  61 static
  62 struct format bt_dummy_format = {
  63         .open_trace = bt_dummy_open_trace,
  64         .close_trace = bt_dummy_close_trace,
  65 };
  66
  67 static
  68 void __attribute__((constructor)) bt_dummy_init(void)
  69 {
  70         int ret;
  71
  72         bt_dummy_format.name = g_quark_from_static_string("dummy");
  73         ret = bt_register_format(&bt_dummy_format);
  74         assert(!ret);
  75 }
  76
  77 /* TODO: finalize */