root/win32/time.c

DEFINITIONS

1. get_time_func
2. php_win32_init_gettimeofday
3. getfilesystemtime
4. gettimeofday
5. usleep
6. nanosleep

   1 /*****************************************************************************
   2  *                                                                           *
   3  * DH_TIME.C                                                                 *
   4  *                                                                           *
   5  * Freely redistributable and modifiable.  Use at your own risk.             *
   6  *                                                                           *
   7  * Copyright 1994 The Downhill Project                                       *
   8  *
   9  * Modified by Shane Caraveo for use with PHP
  10  *
  11  *****************************************************************************/
  12 
  13 /* $Id$ */
  14 
  15 /* Include stuff ************************************************************ */
  16 
  17 #include <config.w32.h>
  18 
  19 #include "time.h"
  20 #include "unistd.h"
  21 #include "signal.h"
  22 #include <windows.h>
  23 #include <winbase.h>
  24 #include <mmsystem.h>
  25 #include <errno.h>
  26 #include "php_win32_globals.h"
  27 
  28 typedef VOID (WINAPI *MyGetSystemTimeAsFileTime)(LPFILETIME lpSystemTimeAsFileTime);
  29 
  30 static MyGetSystemTimeAsFileTime timefunc = NULL;
  31 
  32 #ifdef PHP_EXPORTS
  33 static zend_always_inline MyGetSystemTimeAsFileTime get_time_func(void)
  34 {
  35         MyGetSystemTimeAsFileTime timefunc = NULL;
  36         HMODULE hMod = GetModuleHandle("kernel32.dll");
  37 
  38         if (hMod) {
  39                 /* Max possible resolution <1us, win8/server2012 */
  40                 timefunc = (MyGetSystemTimeAsFileTime)GetProcAddress(hMod, "GetSystemTimePreciseAsFileTime");
  41 
  42                 if(!timefunc) {
  43                         /* 100ns blocks since 01-Jan-1641 */
  44                         timefunc = (MyGetSystemTimeAsFileTime)GetProcAddress(hMod, "GetSystemTimeAsFileTime");
  45                 }
  46         }
  47 
  48         return timefunc;
  49 }
  50 
  51 BOOL php_win32_init_gettimeofday(void)
  52 {
  53         timefunc = get_time_func();
  54 
  55         return (NULL != timefunc);
  56 }
  57 #endif
  58 
  59 static zend_always_inline int getfilesystemtime(struct timeval *tv)
  60 {
  61         FILETIME ft;
  62         unsigned __int64 ff = 0;
  63         ULARGE_INTEGER fft;
  64 
  65         timefunc(&ft);
  66 
  67         /*
  68          * Do not cast a pointer to a FILETIME structure to either a
  69          * ULARGE_INTEGER* or __int64* value because it can cause alignment faults on 64-bit Windows.
  70          * via  http://technet.microsoft.com/en-us/library/ms724284(v=vs.85).aspx
  71          */
  72         fft.HighPart = ft.dwHighDateTime;
  73         fft.LowPart = ft.dwLowDateTime;
  74         ff = fft.QuadPart;
  75 
  76         ff /= 10Ui64; /* convert to microseconds */
  77         ff -= 11644473600000000Ui64; /* convert to unix epoch */
  78 
  79         tv->tv_sec = (long)(ff / 1000000Ui64);
  80         tv->tv_usec = (long)(ff % 1000000Ui64);
  81 
  82         return 0;
  83 }
  84 
  85 PHPAPI int gettimeofday(struct timeval *time_Info, struct timezone *timezone_Info)
  86 {
  87         /* Get the time, if they want it */
  88         if (time_Info != NULL) {
  89                 getfilesystemtime(time_Info);
  90         }
  91         /* Get the timezone, if they want it */
  92         if (timezone_Info != NULL) {
  93                 _tzset();
  94                 timezone_Info->tz_minuteswest = _timezone;
  95                 timezone_Info->tz_dsttime = _daylight;
  96         }
  97         /* And return */
  98         return 0;
  99 }
 100 
 101 PHPAPI int usleep(unsigned int useconds)
 102 {
 103         HANDLE timer;
 104         LARGE_INTEGER due;
 105 
 106         due.QuadPart = -(10 * (__int64)useconds);
 107 
 108         timer = CreateWaitableTimer(NULL, TRUE, NULL);
 109         SetWaitableTimer(timer, &due, 0, NULL, NULL, 0);
 110         WaitForSingleObject(timer, INFINITE);
 111         CloseHandle(timer);
 112         return 0;
 113 }
 114 
 115 PHPAPI int nanosleep( const struct timespec * rqtp, struct timespec * rmtp )
 116 {
 117         if (rqtp->tv_nsec > 999999999) {
 118                 /* The time interval specified 1,000,000 or more microseconds. */
 119                 errno = EINVAL;
 120                 return -1;
 121         }
 122         return usleep( rqtp->tv_sec * 1000000 + rqtp->tv_nsec / 1000  );
 123 }
 124 
 125 /*
 126  * Local variables:
 127  * tab-width: 4
 128  * c-basic-offset: 4
 129  * End:
 130  * vim600: sw=4 ts=4 fdm=marker
 131  * vim<600: sw=4 ts=4
 132  */