include/babeltrace/trace-handle.h

   1 #ifndef _BABELTRACE_TRACE_HANDLE_H
   2 #define _BABELTRACE_TRACE_HANDLE_H
   3
   4 /*
   5  * BabelTrace
   6  *
   7  * trace_handle header
   8  *
   9  * Copyright 2012 EfficiOS Inc. and Linux Foundation
  10  *
  11  * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  12  *         Julien Desfossez <julien.desfossez@efficios.com>
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a copy
  15  * of this software and associated documentation files (the "Software"), to deal
  16  * in the Software without restriction, including without limitation the rights
  17  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  18  * copies of the Software, and to permit persons to whom the Software is
  19  * furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included in
  22  * all copies or substantial portions of the Software.
  23  */
  24
  25 #include <stdint.h>
  26 #include <babeltrace/clock-types.h>
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 /*
  33  * trace_handle : unique identifier of a trace
  34  *
  35  * The trace_handle allows the user to manipulate a trace file directly.
  36  * It is a unique identifier representing a trace file.
  37  */
  38 struct bt_trace_handle;
  39 struct bt_ctf_event;
  40
  41 /*
  42  * bt_trace_handle_get_path : returns the path of a trace_handle or NULL
  43  * on error.
  44  */
  45 const char *bt_trace_handle_get_path(struct bt_context *ctx, int handle_id);
  46
  47 /*
  48  * bt_trace_handle_get_timestamp_begin : returns the creation time (in
  49  * nanoseconds or cycles depending on type) of the buffers of a trace
  50  * or -1ULL on error.
  51  */
  52 uint64_t bt_trace_handle_get_timestamp_begin(struct bt_context *ctx,
  53                 int handle_id, enum bt_clock_type type);
  54
  55 /*
  56  * bt_trace_handle_get_timestamp_end : returns the destruction timestamp
  57  * (in nanoseconds or cycles depending on type) of the buffers of a trace
  58  * or -1ULL on error.
  59  */
  60 uint64_t bt_trace_handle_get_timestamp_end(struct bt_context *ctx,
  61                 int handle_id, enum bt_clock_type type);
  62
  63 /*
  64  * bt_ctf_event_get_handle_id : get the handle id associated with an event
  65  *
  66  * Returns -1 on error
  67  */
  68 int bt_ctf_event_get_handle_id(const struct bt_ctf_event *event);
  69
  70 #ifdef __cplusplus
  71 }
  72 #endif
  73
  74 #endif /* _BABELTRACE_TRACE_HANDLE_H */