include/babeltrace/babeltrace-internal.h

   1 #ifndef _BABELTRACE_INTERNAL_H
   2 #define _BABELTRACE_INTERNAL_H
   3
   4 /*
   5  * babeltrace/babeltrace-internal.h
   6  *
   7  * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25  * SOFTWARE.
  26  */
  27 #include <stdio.h>
  28 #include <glib.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #include <babeltrace/compat/string-internal.h>
  33 #include <babeltrace/types.h>
  34
  35 #define PERROR_BUFLEN   200
  36
  37 #ifndef likely
  38 # ifdef __GNUC__
  39 #  define likely(x)      __builtin_expect(!!(x), 1)
  40 # else
  41 #  define likely(x)      (!!(x))
  42 # endif
  43 #endif
  44
  45 #ifndef unlikely
  46 # ifdef __GNUC__
  47 #  define unlikely(x)    __builtin_expect(!!(x), 0)
  48 # else
  49 #  define unlikely(x)    (!!(x))
  50 # endif
  51 #endif
  52
  53 #ifndef min
  54 #define min(a, b)       (((a) < (b)) ? (a) : (b))
  55 #endif
  56
  57 #ifndef max
  58 #define max(a, b)       (((a) > (b)) ? (a) : (b))
  59 #endif
  60
  61 #ifndef max_t
  62 #define max_t(type, a, b)       \
  63         ((type) (a) > (type) (b) ? (type) (a) : (type) (b))
  64 #endif
  65
  66 /*
  67  * Memory allocation zeroed
  68  */
  69 #define zmalloc(x) calloc(1, x)
  70
  71 /*
  72  * BT_HIDDEN: set the hidden attribute for internal functions
  73  * On Windows, symbols are local unless explicitly exported,
  74  * see https://gcc.gnu.org/wiki/Visibility
  75  */
  76 #if defined(_WIN32) || defined(__CYGWIN__)
  77 #define BT_HIDDEN
  78 #else
  79 #define BT_HIDDEN __attribute__((visibility("hidden")))
  80 #endif
  81
  82 #ifndef __STRINGIFY
  83 #define __STRINGIFY(x)  #x
  84 #endif
  85
  86 #define TOSTRING(x)     __STRINGIFY(x)
  87
  88 #define BT_UNUSED       __attribute__((unused))
  89
  90 #endif