source/libs/cairo/cairo-src/src/cairo-time-private.h

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright (C) 2011 Andrea Canciani
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software
   6  * and its documentation for any purpose is hereby granted without
   7  * fee, provided that the above copyright notice appear in all copies
   8  * and that both that copyright notice and this permission notice
   9  * appear in supporting documentation, and that the name of the
  10  * copyright holders not be used in advertising or publicity
  11  * pertaining to distribution of the software without specific,
  12  * written prior permission. The copyright holders make no
  13  * representations about the suitability of this software for any
  14  * purpose.  It is provided "as is" without express or implied
  15  * warranty.
  16  *
  17  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  18  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  19  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  20  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  21  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
  22  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  23  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  24  * SOFTWARE.
  25  *
  26  * Authors: Andrea Canciani <ranma42@gmail.com>
  27  *
  28  */
  29
  30 #ifndef CAIRO_TIME_PRIVATE_H
  31 #define CAIRO_TIME_PRIVATE_H
  32
  33 #include "cairo-compiler-private.h"
  34 #include "cairo-wideint-private.h"
  35
  36 /* Make the base type signed for easier arithmetic */
  37 typedef cairo_int64_t cairo_time_t;
  38
  39 #define _cairo_time_add _cairo_int64_add
  40 #define _cairo_time_sub _cairo_int64_sub
  41 #define _cairo_time_gt  _cairo_int64_gt
  42 #define _cairo_time_lt  _cairo_int64_lt
  43
  44 #define _cairo_time_to_double   _cairo_int64_to_double
  45 #define _cairo_time_from_double _cairo_double_to_int64
  46
  47 cairo_private int
  48 _cairo_time_cmp (const void *a,
  49                  const void *b);
  50
  51 cairo_private double
  52 _cairo_time_to_s (cairo_time_t t);
  53
  54 cairo_private cairo_time_t
  55 _cairo_time_from_s (double t);
  56
  57 cairo_private cairo_time_t
  58 _cairo_time_get (void);
  59
  60 static cairo_always_inline cairo_time_t
  61 _cairo_time_get_delta (cairo_time_t t)
  62 {
  63     cairo_time_t now;
  64
  65     now = _cairo_time_get ();
  66
  67     return _cairo_time_sub (now, t);
  68 }
  69
  70 static cairo_always_inline double
  71 _cairo_time_to_ns (cairo_time_t t)
  72 {
  73     return 1.e9 * _cairo_time_to_s (t);
  74 }
  75
  76 static cairo_always_inline cairo_time_t
  77 _cairo_time_max (cairo_time_t a, cairo_time_t b)
  78 {
  79     if (_cairo_int64_gt (a, b))
  80         return a;
  81     else
  82         return b;
  83 }
  84
  85 static cairo_always_inline cairo_time_t
  86 _cairo_time_min (cairo_time_t a, cairo_time_t b)
  87 {
  88     if (_cairo_int64_lt (a, b))
  89         return a;
  90     else
  91         return b;
  92 }
  93
  94 #endif