include/lttng/ust-tracer.h

   1 #ifndef _LTTNG_UST_TRACER_H
   2 #define _LTTNG_UST_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  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  26  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  27  * SOFTWARE.
  28  */
  29
  30 #include <limits.h>
  31
  32 #if defined (__cplusplus)
  33 #include <type_traits>
  34 #endif
  35
  36 #include <lttng/ust-compiler.h>
  37 #include <lttng/ust-config.h>
  38 #include <lttng/ust-version.h>
  39
  40 #ifndef LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS
  41 /* Align data on its natural alignment */
  42 #define RING_BUFFER_ALIGN
  43 #endif
  44
  45 #ifndef CHAR_BIT
  46 #define CHAR_BIT 8
  47 #endif
  48
  49 #ifdef RING_BUFFER_ALIGN
  50 #define lttng_alignof(type)     __alignof__(type)
  51 #else
  52 #define lttng_alignof(type)     1
  53 #endif
  54
  55 #define lttng_is_signed_type(type)           ((type) -1 < (type) 0)
  56
  57 /*
  58  * This macro adds a compilation assertion that CTF arrays and sequences
  59  * declared by the users are of an integral type.
  60  */
  61
  62 #if defined(__cplusplus)
  63 #define _lttng_is_integer(type) (std::is_integral<type>::value)
  64 #else
  65 #define _lttng_is_integer(type) (__builtin_types_compatible_p(type, _Bool) || \
  66                 __builtin_types_compatible_p(type, char) || \
  67                 __builtin_types_compatible_p(type, unsigned char) || \
  68                 __builtin_types_compatible_p(type, short) || \
  69                 __builtin_types_compatible_p(type, unsigned short) || \
  70                 __builtin_types_compatible_p(type, int) || \
  71                 __builtin_types_compatible_p(type, unsigned int) || \
  72                 __builtin_types_compatible_p(type, long) || \
  73                 __builtin_types_compatible_p(type, unsigned long) || \
  74                 __builtin_types_compatible_p(type, long long) || \
  75                 __builtin_types_compatible_p(type, unsigned long long))
  76 #endif
  77
  78 #define _lttng_array_element_type_is_supported(_type, _item) \
  79                 lttng_static_assert(_lttng_is_integer(_type), \
  80                         "Non-integer type `" #_item "` not supported as element of CTF_ARRAY or CTF_SEQUENCE", \
  81                         Non_integer_type__##_item##__not_supported_as_element_of_CTF_ARRAY_or_CTF_SEQUENCE);
  82
  83 #endif /* _LTTNG_UST_TRACER_H */