include/lttng/ust-tracer.h

   1 #ifndef _LTTNG_TRACER_H
   2 #define _LTTNG_TRACER_H
   3
   4 /*
   5  * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * This contains the core definitions for the Linux Trace Toolkit.
   8  *
   9  * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this software and associated documentation files (the "Software"), to deal
  13  * in the Software without restriction, including without limitation the rights
  14  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15  * copies of the Software, and to permit persons to whom the Software is
  16  * furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20  */
  21
  22 #include <lttng/ust-config.h>
  23 #include <lttng/ust-version.h>
  24
  25 #ifndef LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS
  26 /* Align data on its natural alignment */
  27 #define RING_BUFFER_ALIGN
  28 #endif
  29
  30 #ifndef CHAR_BIT
  31 #define CHAR_BIT 8
  32 #endif
  33
  34 #ifdef RING_BUFFER_ALIGN
  35 #define lttng_alignof(type)     __alignof__(type)
  36 #else
  37 #define lttng_alignof(type)     1
  38 #endif
  39
  40 #define lttng_is_signed_type(type)           (((type)(-1)) < 0)
  41
  42 #endif /* _LTTNG_TRACER_CORE_H */