workbench/libs/mesa/src/gallium/auxiliary/os/os_time.c

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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
  36 #include "pipe/p_config.h"
  37
  38 #if defined(PIPE_OS_UNIX) || defined(PIPE_OS_AROS)
  39 #  include <sys/time.h> /* timeval */
  40 #elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  41 #  include <windows.h>
  42 #  include <winddi.h>
  43 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
  44 #  include <windows.h>
  45 extern VOID KeQuerySystemTime(PLARGE_INTEGER);
  46 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
  47 #  include <windows.h>
  48 #else
  49 #  error Unsupported OS
  50 #endif
  51
  52 #include "os_time.h"
  53
  54
  55 int64_t
  56 os_time_get(void)
  57 {
  58 #if defined(PIPE_OS_UNIX) || defined(PIPE_OS_AROS)
  59
  60    struct timeval tv;
  61    gettimeofday(&tv, NULL);
  62    return tv.tv_usec + tv.tv_sec*1000000LL;
  63
  64 #elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  65
  66    static LONGLONG frequency;
  67    LONGLONG counter;
  68    if(!frequency)
  69       EngQueryPerformanceFrequency(&frequency);
  70    EngQueryPerformanceCounter(&counter);
  71    return counter*INT64_C(1000000)/frequency;
  72
  73 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
  74
  75    static LARGE_INTEGER frequency;
  76    LARGE_INTEGER counter;
  77    if(!frequency.QuadPart)
  78       QueryPerformanceFrequency(&frequency);
  79    QueryPerformanceCounter(&counter);
  80    return counter.QuadPart*INT64_C(1000000)/frequency.QuadPart;
  81
  82 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
  83
  84    /* Updated every 10 miliseconds, measured in units of 100 nanoseconds.
  85     * http://msdn.microsoft.com/en-us/library/ms801642.aspx */
  86    LARGE_INTEGER counter;
  87    KeQuerySystemTime(&counter);
  88    return counter.QuadPart/10;
  89
  90 #endif
  91 }
  92
  93
  94 #if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  95
  96 void
  97 os_time_sleep(int64_t usecs)
  98 {
  99    static LONGLONG frequency;
 100    LONGLONG start, curr, end;
 101
 102    EngQueryPerformanceCounter(&start);
 103
 104    if(!frequency)
 105       EngQueryPerformanceFrequency(&frequency);
 106
 107    end = start + (usecs * frequency + 999999LL)/1000000LL;
 108
 109    do {
 110       EngQueryPerformanceCounter(&curr);
 111    } while(start <= curr && curr < end ||
 112            end < start && (curr < end || start <= curr));
 113 }
 114
 115 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 116
 117 void
 118 os_time_sleep(int64_t usecs)
 119 {
 120    Sleep((usecs + 999) / 1000);
 121 }
 122
 123 #endif