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  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
  10  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
  11  *
  12  * Permission is hereby granted to use or copy this program
  13  * for any purpose,  provided the above notices are retained on all copies.
  14  * Permission to modify the code and to distribute modified code is granted,
  15  * provided the above notices are retained, and a notice that the code was
  16  * modified is included with the above copyright notice.
  17  */
  18
  19 #include <lttng/ust-config.h>
  20 #include <lttng/ust-version.h>
  21
  22 #ifndef LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS
  23 /* Align data on its natural alignment */
  24 #define RING_BUFFER_ALIGN
  25 #endif
  26
  27 #ifndef CHAR_BIT
  28 #define CHAR_BIT 8
  29 #endif
  30
  31 #ifdef RING_BUFFER_ALIGN
  32 #define lttng_alignof(type)     __alignof__(type)
  33 #else
  34 #define lttng_alignof(type)     1
  35 #endif
  36
  37 #define lttng_is_signed_type(type)           (((type)(-1)) < 0)
  38
  39 #endif /* _LTTNG_TRACER_CORE_H */