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_EMBEDDED)
  39
  40 #if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU) || defined(PIPE_OS_CYGWIN)
  41 #  include <sys/time.h> /* timeval */
  42 #elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  43 #  include <windows.h>
  44 #  include <winddi.h>
  45 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
  46 #  include <windows.h>
  47 extern VOID KeQuerySystemTime(PLARGE_INTEGER);
  48 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
  49 #  include <windows.h>
  50 #else
  51 #  error Unsupported OS
  52 #endif
  53
  54 #include "os_time.h"
  55
  56
  57 int64_t
  58 os_time_get(void)
  59 {
  60 #if defined(PIPE_OS_UNIX)
  61
  62    struct timeval tv;
  63    gettimeofday(&tv, NULL);
  64    return tv.tv_usec + tv.tv_sec*1000000LL;
  65
  66 #elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  67
  68    static LONGLONG frequency;
  69    LONGLONG counter;
  70    if(!frequency)
  71       EngQueryPerformanceFrequency(&frequency);
  72    EngQueryPerformanceCounter(&counter);
  73    return counter*INT64_C(1000000)/frequency;
  74
  75 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
  76
  77    static LARGE_INTEGER frequency;
  78    LARGE_INTEGER counter;
  79    if(!frequency.QuadPart)
  80       QueryPerformanceFrequency(&frequency);
  81    QueryPerformanceCounter(&counter);
  82    return counter.QuadPart*INT64_C(1000000)/frequency.QuadPart;
  83
  84 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
  85
  86    /* Updated every 10 miliseconds, measured in units of 100 nanoseconds.
  87     * http://msdn.microsoft.com/en-us/library/ms801642.aspx */
  88    LARGE_INTEGER counter;
  89    KeQuerySystemTime(&counter);
  90    return counter.QuadPart/10;
  91
  92 #endif
  93 }
  94
  95
  96 #if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
  97
  98 void
  99 os_time_sleep(int64_t usecs)
 100 {
 101    static LONGLONG frequency;
 102    LONGLONG start, curr, end;
 103
 104    EngQueryPerformanceCounter(&start);
 105
 106    if(!frequency)
 107       EngQueryPerformanceFrequency(&frequency);
 108
 109    end = start + (usecs * frequency + 999999LL)/1000000LL;
 110
 111    do {
 112       EngQueryPerformanceCounter(&curr);
 113    } while(start <= curr && curr < end ||
 114            end < start && (curr < end || start <= curr));
 115 }
 116
 117 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
 118
 119 void
 120 os_time_sleep(int64_t usecs)
 121 {
 122    Sleep((usecs + 999) / 1000);
 123 }
 124
 125 #endif
 126
 127
 128 #endif /* !PIPE_OS_EMBEDDED */