headers/private/libroot/time_private.h

   1 /*
   2  * Copyright 2011, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _LIBROOT_TIME_PRIVATE_H
   6 #define _LIBROOT_TIME_PRIVATE_H
   7
   8
   9 #include <errno.h>
  10 #include <sys/cdefs.h>
  11 #include <sys/time.h>
  12 #include <time.h>
  13
  14 #include <SupportDefs.h>
  15
  16 #include <new>
  17
  18 #define CLOCKS_PER_SEC_BEOS                                     1000
  19 #define CLK_TCK_BEOS                                            CLOCKS_PER_SEC_BEOS
  20
  21 #define MICROSECONDS_PER_CLOCK_TICK                     (1000000 / CLOCKS_PER_SEC)
  22 #define MICROSECONDS_PER_CLOCK_TICK_BEOS        (1000000 / CLOCKS_PER_SEC_BEOS)
  23
  24
  25 struct __timer_t {
  26         int32           id;
  27         thread_id       thread;
  28
  29         void SetTo(int32 id, thread_id thread)
  30         {
  31                 this->id = id;
  32                 this->thread = thread;
  33         }
  34 };
  35
  36
  37 static inline void
  38 bigtime_to_timespec(bigtime_t time, timespec& spec)
  39 {
  40         spec.tv_sec = time / 1000000;
  41         spec.tv_nsec = (time % 1000000) * 1000;
  42 }
  43
  44
  45 static inline bool
  46 timespec_to_bigtime(const timespec& spec, bigtime_t& _time)
  47 {
  48         if (spec.tv_sec < 0 || spec.tv_nsec < 0 || spec.tv_nsec >= 1000000000)
  49                 return false;
  50
  51         _time = (bigtime_t)spec.tv_sec * 1000000 + (spec.tv_nsec + 999) / 1000;
  52
  53         return true;
  54 }
  55
  56
  57 static inline bool
  58 timeval_to_timespec(const timeval& val, timespec& spec)
  59 {
  60         if (val.tv_sec < 0 || val.tv_usec < 0 || val.tv_usec >= 1000000)
  61                 return false;
  62
  63         spec.tv_sec = val.tv_sec;
  64         spec.tv_nsec = val.tv_usec * 1000;
  65
  66         return true;
  67 }
  68
  69
  70 static inline void
  71 timespec_to_timeval(const timespec& spec, timeval& val)
  72 {
  73         val.tv_sec = spec.tv_sec;
  74         val.tv_usec = spec.tv_nsec / 1000;
  75 }
  76
  77
  78 __BEGIN_DECLS
  79
  80
  81 clock_t __clock_beos(void);
  82 clock_t __clock(void);
  83
  84
  85 __END_DECLS
  86
  87
  88 #endif  // _LIBROOT_TIME_PRIVATE_H