src/gallium/auxiliary/os/os_time.h

   1 /**************************************************************************
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   3  * Copyright 2008-2010 VMware, Inc.
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  27
  28 /**
  29  * @file
  30  * OS independent time-manipulation functions.
  31  *
  32  * @author Jose Fonseca <jfonseca@vmware.com>
  33  */
  34
  35 #ifndef _OS_TIME_H_
  36 #define _OS_TIME_H_
  37
  38
  39 #include "pipe/p_config.h"
  40
  41 #if defined(PIPE_OS_UNIX)
  42 #  include <unistd.h> /* usleep */
  43 #endif
  44
  45 #include "pipe/p_compiler.h"
  46
  47
  48 #ifdef  __cplusplus
  49 extern "C" {
  50 #endif
  51
  52
  53 /*
  54  * Get the current time in microseconds from an unknown base.
  55  */
  56 int64_t
  57 os_time_get(void);
  58
  59
  60 /*
  61  * Get the current time in nanoseconds from an unknown base.
  62  */
  63 uint64_t
  64 os_time_get_nano(void);
  65
  66
  67 /*
  68  * Sleep.
  69  */
  70 #if defined(PIPE_OS_UNIX)
  71 #define os_time_sleep(_usecs) usleep(_usecs)
  72 #else
  73 void
  74 os_time_sleep(int64_t usecs);
  75 #endif
  76
  77
  78 /*
  79  * Helper function for detecting time outs, taking in account overflow.
  80  *
  81  * Returns true if the current time has elapsed beyond the specified interval.
  82  */
  83 static INLINE boolean
  84 os_time_timeout(int64_t start,
  85                 int64_t end,
  86                 int64_t curr)
  87 {
  88    if(start <= end)
  89       return !(start <= curr && curr < end);
  90    else
  91       return !((start <= curr) || (curr < end));
  92 }
  93
  94
  95 #ifdef  __cplusplus
  96 }
  97 #endif
  98
  99 #endif /* _OS_TIME_H_ */