Re: droped out precise time calculations in src/interfaces/libpq/fe-connect.c

Denis A Ustimenko wrote:
> On Sun, Oct 13, 2002 at 09:02:55PM -0700, Joe Conway wrote:
> > Denis A Ustimenko wrote:
> > >>Bruce, why have all precise time calculations been droped out in 1.206? 
> > >>If there is no
> > >>gettimeofday in win32?
> > 
> > gettimeofday was not portable to win32 (at least not that I could find) and 
> > hence broke the win32 build of the clients.
> > 
> 
> GetSystemTimeAsFileTime should help.
> 
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/getsystemtimeasfiletime.asp

It's not clear to me how we could get this into something we can deal
with like gettimeofday.

I looked at the Apache APR project, and they have a routine that returns
the microseconds since 1970 for Unix:/* NB NB NB NB This returns GMT!!!!!!!!!! */APR_DECLARE(apr_time_t)
apr_time_now(void){   struct timeval tv;    gettimeofday(&tv, NULL);    return tv.tv_sec * APR_USEC_PER_SEC +
tv.tv_usec;}

and for Win32:APR_DECLARE(apr_time_t) apr_time_now(void){    LONGLONG aprtime = 0;    FILETIME time;#ifndef _WIN32_WCE
 GetSystemTimeAsFileTime(&time);#else    SYSTEMTIME st;    GetSystemTime(&st);    SystemTimeToFileTime(&st,
&time);#endif   FileTimeToAprTime(&aprtime, &time);    return aprtime; }
 

and FileTimeToAprTime() is:/* Number of micro-seconds between the beginning of the Windows epoch * (Jan. 1, 1601) and
theUnix epoch (Jan. 1, 1970)  */#define APR_DELTA_EPOCH_IN_USEC   APR_TIME_C(11644473600000000);__inline void
FileTimeToAprTime(apr_time_t*result, FILETIME *input){    /* Convert FILETIME one 64 bit number so we can work with it.
*/   *result = input->dwHighDateTime;    *result = (*result) << 32;    *result |= input->dwLowDateTime;    *result /=
10;   /* Convert from 100 nano-sec periods to micro-seconds. */    *result -= APR_DELTA_EPOCH_IN_USEC;  /* Convert from
Windowsepoch to Unix epoch */    return;}
 

So, this is what needs to be dealt with to get it working.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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