include/babeltrace/babeltrace-internal.h

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