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)
  39 #  include <time.h> /* timeval */
  40 #  include <sys/time.h> /* timeval */
  41 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
  42 #  include <windows.h>
  43 #else
  44 #  error Unsupported OS
  45 #endif
  46
  47 #include "os_time.h"
  48
  49
  50 int64_t
  51 os_time_get_nano(void)
  52 {
  53 #if defined(PIPE_OS_LINUX)
  54
  55    struct timespec tv;
  56    clock_gettime(CLOCK_MONOTONIC, &tv);
  57    return tv.tv_nsec + tv.tv_sec*INT64_C(1000000000);
  58
  59 #elif defined(PIPE_OS_UNIX)
  60
  61    struct timeval tv;
  62    gettimeofday(&tv, NULL);
  63    return tv.tv_usec*INT64_C(1000) + tv.tv_sec*INT64_C(1000000000);
  64
  65 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
  66
  67    static LARGE_INTEGER frequency;
  68    LARGE_INTEGER counter;
  69    if(!frequency.QuadPart)
  70       QueryPerformanceFrequency(&frequency);
  71    QueryPerformanceCounter(&counter);
  72    return counter.QuadPart*INT64_C(1000000000)/frequency.QuadPart;
  73
  74 #else
  75
  76 #error Unsupported OS
  77
  78 #endif
  79 }
  80
  81
  82 #if defined(PIPE_SUBSYSTEM_WINDOWS_USER)
  83
  84 void
  85 os_time_sleep(int64_t usecs)
  86 {
  87    DWORD dwMilliseconds = (DWORD) ((usecs + 999) / 1000);
  88    /* Avoid Sleep(O) as that would cause to sleep for an undetermined duration */
  89    if (dwMilliseconds) {
  90       Sleep(dwMilliseconds);
  91    }
  92 }
  93
  94 #endif