[p5sagit/p5-mst-13.2.git] / ext / Time / HiRes / HiRes.xs

#ifdef __cplusplus
extern "C" {
#endif
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifdef WIN32
#include <time.h>
#else
#include <sys/time.h>
#endif
#ifdef __cplusplus
}
#endif

static IV
constant(char *name, int arg)
{
    errno = 0;
    switch (*name) {
    case 'I':
      if (strEQ(name, "ITIMER_REAL"))
#ifdef ITIMER_REAL
	return ITIMER_REAL;
#else
	goto not_there;
#endif
      if (strEQ(name, "ITIMER_REALPROF"))
#ifdef ITIMER_REALPROF
	return ITIMER_REALPROF;
#else
	goto not_there;
#endif
      if (strEQ(name, "ITIMER_VIRTUAL"))
#ifdef ITIMER_VIRTUAL
	return ITIMER_VIRTUAL;
#else
	goto not_there;
#endif
      if (strEQ(name, "ITIMER_PROF"))
#ifdef ITIMER_PROF
	return ITIMER_PROF;
#else
	goto not_there;
#endif
      break;
    }
    errno = EINVAL;
    return 0;

not_there:
    errno = ENOENT;
    return 0;
}

#if !defined(HAS_GETTIMEOFDAY) && defined(WIN32)
#define HAS_GETTIMEOFDAY

/* shows up in winsock.h?
struct timeval {
 long tv_sec;
 long tv_usec;
}
*/

typedef union {
    unsigned __int64	ft_i64;
    FILETIME		ft_val;
} FT_t;

/* Number of 100 nanosecond units from 1/1/1601 to 1/1/1970 */
#define EPOCH_BIAS  116444736000000000i64

/* NOTE: This does not compute the timezone info (doing so can be expensive,
 * and appears to be unsupported even by glibc) */
int
gettimeofday (struct timeval *tp, void *not_used)
{
    FT_t ft;

    /* this returns time in 100-nanosecond units  (i.e. tens of usecs) */
    GetSystemTimeAsFileTime(&ft.ft_val);

    /* seconds since epoch */
    tp->tv_sec = (long)((ft.ft_i64 - EPOCH_BIAS) / 10000000i64);

    /* microseconds remaining */
    tp->tv_usec = (long)((ft.ft_i64 / 10i64) % 1000000i64);

    return 0;
}
#endif

#if !defined(HAS_GETTIMEOFDAY) && defined(VMS)
#define HAS_GETTIMEOFDAY

#include <lnmdef.h>
#include <time.h> /* gettimeofday */
#include <stdlib.h> /* qdiv */
#include <starlet.h> /* sys$gettim */
#include <descrip.h>
#ifdef __VAX
#include <lib$routines.h> /* lib$ediv() */
#endif

/*
        VMS binary time is expressed in 100 nano-seconds since
        system base time which is 17-NOV-1858 00:00:00.00
*/

#define DIV_100NS_TO_SECS  10000000L
#define DIV_100NS_TO_USECS 10L

/* 
        gettimeofday is supposed to return times since the epoch
        so need to determine this in terms of VMS base time
*/
static $DESCRIPTOR(dscepoch,"01-JAN-1970 00:00:00.00");

#ifdef __VAX
static long base_adjust[2]={0L,0L};
#else
static __int64 base_adjust=0;
#endif

/* 

   If we don't have gettimeofday, then likely we are on a VMS machine that
   operates on local time rather than UTC...so we have to zone-adjust.
   This code gleefully swiped from VMS.C 

*/
/* method used to handle UTC conversions:
 *   1 == CRTL gmtime();  2 == SYS$TIMEZONE_DIFFERENTIAL;  3 == no correction
 */
static int gmtime_emulation_type;
/* number of secs to add to UTC POSIX-style time to get local time */
static long int utc_offset_secs;
static struct dsc$descriptor_s fildevdsc = 
  { 12, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$FILE_DEV" };
static struct dsc$descriptor_s *fildev[] = { &fildevdsc, NULL };

static time_t toutc_dst(time_t loc) {
  struct tm *rsltmp;

  if ((rsltmp = localtime(&loc)) == NULL) return -1;
  loc -= utc_offset_secs;
  if (rsltmp->tm_isdst) loc -= 3600;
  return loc;
}

static time_t toloc_dst(time_t utc) {
  struct tm *rsltmp;

  utc += utc_offset_secs;
  if ((rsltmp = localtime(&utc)) == NULL) return -1;
  if (rsltmp->tm_isdst) utc += 3600;
  return utc;
}

#define _toutc(secs)  ((secs) == (time_t) -1 ? (time_t) -1 : \
       ((gmtime_emulation_type || timezone_setup()), \
       (gmtime_emulation_type == 1 ? toutc_dst(secs) : \
       ((secs) - utc_offset_secs))))

#define _toloc(secs)  ((secs) == (time_t) -1 ? (time_t) -1 : \
       ((gmtime_emulation_type || timezone_setup()), \
       (gmtime_emulation_type == 1 ? toloc_dst(secs) : \
       ((secs) + utc_offset_secs))))

static int
timezone_setup(void) 
{
  struct tm *tm_p;

  if (gmtime_emulation_type == 0) {
    int dstnow;
    time_t base = 15 * 86400; /* 15jan71; to avoid month/year ends between    */
                              /* results of calls to gmtime() and localtime() */
                              /* for same &base */

    gmtime_emulation_type++;
    if ((tm_p = gmtime(&base)) == NULL) { /* CRTL gmtime() is a fake */
      char off[LNM$C_NAMLENGTH+1];;

      gmtime_emulation_type++;
      if (!Perl_vmstrnenv("SYS$TIMEZONE_DIFFERENTIAL",off,0,fildev,0)) {
        gmtime_emulation_type++;
        utc_offset_secs = 0;
        Perl_warn(aTHX_ "no UTC offset information; assuming local time is UTC");
      }
      else { utc_offset_secs = atol(off); }
    }
    else { /* We've got a working gmtime() */
      struct tm gmt, local;

      gmt = *tm_p;
      tm_p = localtime(&base);
      local = *tm_p;
      utc_offset_secs  = (local.tm_mday - gmt.tm_mday) * 86400;
      utc_offset_secs += (local.tm_hour - gmt.tm_hour) * 3600;
      utc_offset_secs += (local.tm_min  - gmt.tm_min)  * 60;
      utc_offset_secs += (local.tm_sec  - gmt.tm_sec);
    }
  }
  return 1;
}


int
gettimeofday (struct timeval *tp, void *tpz)
{
 long ret;
#ifdef __VAX
 long quad[2];
 long quad1[2];
 long div_100ns_to_secs;
 long div_100ns_to_usecs;
 long quo,rem;
 long quo1,rem1;
#else
 __int64 quad;
 __qdiv_t ans1,ans2;
#endif
/*
        In case of error, tv_usec = 0 and tv_sec = VMS condition code.
        The return from function is also set to -1.
        This is not exactly as per the manual page.
*/

 tp->tv_usec = 0;

#ifdef __VAX
 if (base_adjust[0]==0 && base_adjust[1]==0) {
#else
 if (base_adjust==0) { /* Need to determine epoch adjustment */
#endif
        ret=sys$bintim(&dscepoch,&base_adjust);
        if (1 != (ret &&1)) {
                tp->tv_sec = ret;
                return -1;
        }
 }

 ret=sys$gettim(&quad); /* Get VMS system time */
 if ((1 && ret) == 1) {
#ifdef __VAX
        quad[0] -= base_adjust[0]; /* convert to epoch offset */
        quad[1] -= base_adjust[1]; /* convert 2nd half of quadword */
        div_100ns_to_secs = DIV_100NS_TO_SECS;
        div_100ns_to_usecs = DIV_100NS_TO_USECS;
        lib$ediv(&div_100ns_to_secs,&quad,&quo,&rem);
        quad1[0] = rem;
        quad1[1] = 0L;
        lib$ediv(&div_100ns_to_usecs,&quad1,&quo1,&rem1);
        tp->tv_sec = quo; /* Whole seconds */
        tp->tv_usec = quo1; /* Micro-seconds */
#else
        quad -= base_adjust; /* convert to epoch offset */
        ans1=qdiv(quad,DIV_100NS_TO_SECS);
        ans2=qdiv(ans1.rem,DIV_100NS_TO_USECS);
        tp->tv_sec = ans1.quot; /* Whole seconds */
        tp->tv_usec = ans2.quot; /* Micro-seconds */
#endif
 } else {
        tp->tv_sec = ret;
        return -1;
 }
# ifdef VMSISH_TIME
# ifdef RTL_USES_UTC
  if (VMSISH_TIME) tp->tv_sec = _toloc(tp->tv_sec);
# else
  if (!VMSISH_TIME) tp->tv_sec = _toutc(tp->tv_sec);
# endif
# endif
 return 0;
}
#endif

#if !defined(HAS_USLEEP) && defined(HAS_SELECT)
#ifndef SELECT_IS_BROKEN
#define HAS_USLEEP
#define usleep hrt_usleep  /* could conflict with ncurses for static build */

void
hrt_usleep(unsigned long usec)
{
    struct timeval tv;
    tv.tv_sec = 0;
    tv.tv_usec = usec;
    select(0, (Select_fd_set_t)NULL, (Select_fd_set_t)NULL,
		(Select_fd_set_t)NULL, &tv);
}
#endif
#endif

#if !defined(HAS_USLEEP) && defined(WIN32)
#define HAS_USLEEP
#define usleep hrt_usleep  /* could conflict with ncurses for static build */

void
hrt_usleep(unsigned long usec)
{
    long msec;
    msec = usec / 1000;
    Sleep (msec);
}
#endif


#if !defined(HAS_UALARM) && defined(HAS_SETITIMER)
#define HAS_UALARM
#define ualarm hrt_ualarm  /* could conflict with ncurses for static build */

int
hrt_ualarm(int usec, int interval)
{
   struct itimerval itv;
   itv.it_value.tv_sec = usec / 1000000;
   itv.it_value.tv_usec = usec % 1000000;
   itv.it_interval.tv_sec = interval / 1000000;
   itv.it_interval.tv_usec = interval % 1000000;
   return setitimer(ITIMER_REAL, &itv, 0);
}
#endif

#ifdef HAS_GETTIMEOFDAY

static int
myU2time(UV *ret)
{
  struct timeval Tp;
  int status;
  status = gettimeofday (&Tp, NULL);
  ret[0] = Tp.tv_sec;
  ret[1] = Tp.tv_usec;
  return status;
}

static NV
myNVtime()
{
  struct timeval Tp;
  int status;
  status = gettimeofday (&Tp, NULL);
  return status == 0 ? Tp.tv_sec + (Tp.tv_usec / 1000000.) : -1.0;
}

#endif

MODULE = Time::HiRes            PACKAGE = Time::HiRes

PROTOTYPES: ENABLE

BOOT:
#ifdef HAS_GETTIMEOFDAY
{
  UV auv[2];
  hv_store(PL_modglobal, "Time::NVtime", 12, newSViv((IV) myNVtime()), 0);
  if (myU2time(auv) == 0)
    hv_store(PL_modglobal, "Time::U2time", 12, newSViv((IV) auv[0]), 0);
}
#endif

IV
constant(name, arg)
	char *		name
	int		arg

#if defined(HAS_USLEEP) && defined(HAS_GETTIMEOFDAY)

NV
usleep(useconds)
        NV useconds
	PREINIT:
	struct timeval Ta, Tb;
	CODE:
	gettimeofday(&Ta, NULL);
	if (items > 0) {
	    if (useconds > 1E6) {
		IV seconds = (IV) (useconds / 1E6);
		/* If usleep() has been implemented using setitimer()
		 * then this contortion is unnecessary-- but usleep()
		 * may be implemented in some other way, so let's contort. */
		if (seconds) {
		    sleep(seconds);
		    useconds -= 1E6 * seconds;
		}
	    } else if (useconds < 0.0)
	        croak("Time::HiRes::usleep(%"NVgf"): negative time not invented yet", useconds);
	    usleep((UV)useconds);
	} else
	    PerlProc_pause();
	gettimeofday(&Tb, NULL);
#if 0
	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
#endif
	RETVAL = 1E6*(Tb.tv_sec-Ta.tv_sec)+(NV)((IV)Tb.tv_usec-(IV)Ta.tv_usec);

	OUTPUT:
	RETVAL

NV
sleep(...)
	PREINIT:
	struct timeval Ta, Tb;
	CODE:
	gettimeofday(&Ta, NULL);
	if (items > 0) {
	    NV seconds  = SvNV(ST(0));
	    if (seconds >= 0.0) {
  	         UV useconds = 1E6 * (seconds - (UV)seconds);
		 sleep((UV)seconds);
		 usleep(useconds);
	    } else
	        croak("Time::HiRes::sleep(%"NVgf"): negative time not invented yet", seconds);
	} else
	    PerlProc_pause();
	gettimeofday(&Tb, NULL);
#if 0
	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
#endif
	RETVAL = (NV)(Tb.tv_sec-Ta.tv_sec)+0.000001*(NV)(Tb.tv_usec-Ta.tv_usec);

	OUTPUT:
	RETVAL

#endif

#ifdef HAS_UALARM

int
ualarm(useconds,interval=0)
	int useconds
	int interval
	CODE:
	if (useconds < 0 || interval < 0)
	    croak("Time::HiRes::ualarm(%d, %d): negative time not invented yet", useconds, interval);
	RETVAL = ualarm(useconds, interval);

	OUTPUT:
	RETVAL

NV
alarm(seconds,interval=0)
	NV seconds
	NV interval
	CODE:
	if (seconds < 0.0 || interval < 0.0)
	    croak("Time::HiRes::alarm(%"NVgf", %"NVgf"): negative time not invented yet", seconds, interval);
	RETVAL = (NV)ualarm(seconds  * 1000000,
			    interval * 1000000) / 1E6;

	OUTPUT:
	RETVAL

#endif

#ifdef HAS_GETTIMEOFDAY
#    ifdef MACOS_TRADITIONAL	/* fix epoch TZ and use unsigned time_t */
void
gettimeofday()
        PREINIT:
        struct timeval Tp;
        struct timezone Tz;
        PPCODE:
        int status;
        status = gettimeofday (&Tp, &Tz);
        Tp.tv_sec += Tz.tz_minuteswest * 60;	/* adjust for TZ */

        if (GIMME == G_ARRAY) {
             EXTEND(sp, 2);
             /* Mac OS (Classic) has unsigned time_t */
             PUSHs(sv_2mortal(newSVuv(Tp.tv_sec)));
             PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
        } else {
             EXTEND(sp, 1);
             PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
        }

NV
time()
        PREINIT:
        struct timeval Tp;
        struct timezone Tz;
        CODE:
        int status;
        status = gettimeofday (&Tp, &Tz);
        Tp.tv_sec += Tz.tz_minuteswest * 60;	/* adjust for TZ */
        RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.0);
	OUTPUT:
	RETVAL

#    else	/* MACOS_TRADITIONAL */
void
gettimeofday()
        PREINIT:
        struct timeval Tp;
        PPCODE:
	int status;
        status = gettimeofday (&Tp, NULL);
        if (GIMME == G_ARRAY) {
	     EXTEND(sp, 2);
             PUSHs(sv_2mortal(newSViv(Tp.tv_sec)));
             PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
        } else {
             EXTEND(sp, 1);
             PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
        }

NV
time()
        PREINIT:
        struct timeval Tp;
        CODE:
	int status;
        status = gettimeofday (&Tp, NULL);
        RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.);
	OUTPUT:
	RETVAL

#    endif	/* MACOS_TRADITIONAL */
#endif

#if defined(HAS_GETITIMER) && defined(HAS_SETITIMER)

#define TV2NV(tv) ((NV)((tv).tv_sec) + 0.000001 * (NV)((tv).tv_usec))

void
setitimer(which, seconds, interval = 0)
	int which
	NV seconds
	NV interval
    PREINIT:
	struct itimerval newit;
	struct itimerval oldit;
    PPCODE:
	if (seconds < 0.0 || interval < 0.0)
	    croak("Time::HiRes::setitimer(%"IVdf", %"NVgf", %"NVgf"): negative time not invented yet", which, seconds, interval);
	newit.it_value.tv_sec  = seconds;
	newit.it_value.tv_usec =
	  (seconds  - (NV)newit.it_value.tv_sec)    * 1000000.0;
	newit.it_interval.tv_sec  = interval;
	newit.it_interval.tv_usec =
	  (interval - (NV)newit.it_interval.tv_sec) * 1000000.0;
	if (setitimer(which, &newit, &oldit) == 0) {
	  EXTEND(sp, 1);
	  PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_value))));
	  if (GIMME == G_ARRAY) {
	    EXTEND(sp, 1);
	    PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_interval))));
	  }
	}

void
getitimer(which)
	int which
    PREINIT:
	struct itimerval nowit;
    PPCODE:
	if (getitimer(which, &nowit) == 0) {
	  EXTEND(sp, 1);
	  PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_value))));
	  if (GIMME == G_ARRAY) {
	    EXTEND(sp, 1);
	    PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_interval))));
	  }
	}

#endif

# $Id: HiRes.xs,v 1.11 1999/03/16 02:27:38 wegscd Exp wegscd $

# $Log: HiRes.xs,v $
# Revision 1.11  1999/03/16 02:27:38  wegscd
# Add U2time, NVtime. Fix symbols for static link.
#
# Revision 1.10  1998/09/30 02:36:25  wegscd
# Add VMS changes.
#
# Revision 1.9  1998/07/07 02:42:06  wegscd
# Win32 usleep()
#
# Revision 1.8  1998/07/02 01:47:26  wegscd
# Add Win32 code for gettimeofday.
#
# Revision 1.7  1997/11/13 02:08:12  wegscd
# Add missing EXTEND in gettimeofday() scalar code.
#
# Revision 1.6  1997/11/11 02:32:35  wegscd
# Do something useful when calling gettimeofday() in a scalar context.
# The patch is courtesy of Gisle Aas.
#
# Revision 1.5  1997/11/06 03:10:47  wegscd
# Fake ualarm() if we have setitimer.
#
# Revision 1.4  1997/11/05 05:41:23  wegscd
# Turn prototypes ON (suggested by Gisle Aas)
#
# Revision 1.3  1997/10/13 20:56:15  wegscd
# Add PROTOTYPES: DISABLE
#
# Revision 1.2  1997/05/23 01:01:38  wegscd
# Conditional compilation, depending on what the OS gives us.
#
# Revision 1.1  1996/09/03 18:26:35  wegscd
# Initial revision
#
#
Commit	Line	Data
dcf686c9	1	#ifdef __cplusplus
	2	extern "C" {
	3	#endif
	4	#include "EXTERN.h"
	5	#include "perl.h"
	6	#include "XSUB.h"
	7	#ifdef WIN32
	8	#include <time.h>
	9	#else
	10	#include <sys/time.h>
	11	#endif
	12	#ifdef __cplusplus
	13	}
	14	#endif
	15
3c72ec00	16	static IV
	17	constant(char *name, int arg)
	18	{
	19	errno = 0;
	20	switch (*name) {
	21	case 'I':
	22	if (strEQ(name, "ITIMER_REAL"))
	23	#ifdef ITIMER_REAL
	24	return ITIMER_REAL;
	25	#else
	26	goto not_there;
	27	#endif
	28	if (strEQ(name, "ITIMER_REALPROF"))
	29	#ifdef ITIMER_REALPROF
	30	return ITIMER_REALPROF;
	31	#else
	32	goto not_there;
	33	#endif
	34	if (strEQ(name, "ITIMER_VIRTUAL"))
	35	#ifdef ITIMER_VIRTUAL
	36	return ITIMER_VIRTUAL;
	37	#else
	38	goto not_there;
	39	#endif
	40	if (strEQ(name, "ITIMER_PROF"))
	41	#ifdef ITIMER_PROF
	42	return ITIMER_PROF;
	43	#else
	44	goto not_there;
	45	#endif
	46	break;
	47	}
	48	errno = EINVAL;
	49	return 0;
	50
	51	not_there:
	52	errno = ENOENT;
	53	return 0;
	54	}
	55
dcf686c9	56	#if !defined(HAS_GETTIMEOFDAY) && defined(WIN32)
	57	#define HAS_GETTIMEOFDAY
	58
	59	/* shows up in winsock.h?
	60	struct timeval {
	61	long tv_sec;
	62	long tv_usec;
	63	}
	64	*/
	65
eb1a5092	66	typedef union {
	67	unsigned __int64 ft_i64;
	68	FILETIME ft_val;
	69	} FT_t;
	70
	71	/* Number of 100 nanosecond units from 1/1/1601 to 1/1/1970 */
	72	#define EPOCH_BIAS 116444736000000000i64
	73
	74	/* NOTE: This does not compute the timezone info (doing so can be expensive,
	75	* and appears to be unsupported even by glibc) */
dcf686c9	76	int
eb1a5092	77	gettimeofday (struct timeval tp, void not_used)
dcf686c9	78	{
eb1a5092	79	FT_t ft;
	80
	81	/* this returns time in 100-nanosecond units (i.e. tens of usecs) */
	82	GetSystemTimeAsFileTime(&ft.ft_val);
	83
	84	/* seconds since epoch */
	85	tp->tv_sec = (long)((ft.ft_i64 - EPOCH_BIAS) / 10000000i64);
	86
	87	/* microseconds remaining */
	88	tp->tv_usec = (long)((ft.ft_i64 / 10i64) % 1000000i64);
	89
	90	return 0;
dcf686c9	91	}
	92	#endif
	93
	94	#if !defined(HAS_GETTIMEOFDAY) && defined(VMS)
	95	#define HAS_GETTIMEOFDAY
	96
9b6f56ad	97	#include <lnmdef.h>
dcf686c9	98	#include <time.h> /* gettimeofday */
	99	#include <stdlib.h> /* qdiv */
	100	#include <starlet.h> /* sys$gettim */
	101	#include <descrip.h>
3785778e	102	#ifdef __VAX
	103	#include <lib$routines.h> /* lib$ediv() */
	104	#endif
dcf686c9	105
	106	/*
	107	VMS binary time is expressed in 100 nano-seconds since
	108	system base time which is 17-NOV-1858 00:00:00.00
	109	*/
	110
	111	#define DIV_100NS_TO_SECS 10000000L
	112	#define DIV_100NS_TO_USECS 10L
	113
	114	/*
	115	gettimeofday is supposed to return times since the epoch
	116	so need to determine this in terms of VMS base time
	117	*/
	118	static $DESCRIPTOR(dscepoch,"01-JAN-1970 00:00:00.00");
	119
5cdb7193	120	#ifdef __VAX
3785778e	121	static long base_adjust[2]={0L,0L};
5cdb7193	122	#else
dcf686c9	123	static __int64 base_adjust=0;
5cdb7193	124	#endif
dcf686c9	125
9b6f56ad	126	/*
	127
	128	If we don't have gettimeofday, then likely we are on a VMS machine that
	129	operates on local time rather than UTC...so we have to zone-adjust.
	130	This code gleefully swiped from VMS.C
	131
	132	*/
	133	/* method used to handle UTC conversions:
	134	* 1 == CRTL gmtime(); 2 == SYS$TIMEZONE_DIFFERENTIAL; 3 == no correction
	135	*/
	136	static int gmtime_emulation_type;
	137	/* number of secs to add to UTC POSIX-style time to get local time */
	138	static long int utc_offset_secs;
	139	static struct dsc$descriptor_s fildevdsc =
	140	{ 12, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$FILE_DEV" };
	141	static struct dsc$descriptor_s *fildev[] = { &fildevdsc, NULL };
	142
	143	static time_t toutc_dst(time_t loc) {
	144	struct tm *rsltmp;
	145
	146	if ((rsltmp = localtime(&loc)) == NULL) return -1;
	147	loc -= utc_offset_secs;
	148	if (rsltmp->tm_isdst) loc -= 3600;
	149	return loc;
	150	}
	151
	152	static time_t toloc_dst(time_t utc) {
	153	struct tm *rsltmp;
	154
	155	utc += utc_offset_secs;
	156	if ((rsltmp = localtime(&utc)) == NULL) return -1;
	157	if (rsltmp->tm_isdst) utc += 3600;
	158	return utc;
	159	}
	160
	161	#define _toutc(secs) ((secs) == (time_t) -1 ? (time_t) -1 : \
	162	((gmtime_emulation_type \|\| timezone_setup()), \
	163	(gmtime_emulation_type == 1 ? toutc_dst(secs) : \
	164	((secs) - utc_offset_secs))))
	165
	166	#define _toloc(secs) ((secs) == (time_t) -1 ? (time_t) -1 : \
	167	((gmtime_emulation_type \|\| timezone_setup()), \
	168	(gmtime_emulation_type == 1 ? toloc_dst(secs) : \
	169	((secs) + utc_offset_secs))))
	170
	171	static int
	172	timezone_setup(void)
	173	{
	174	struct tm *tm_p;
	175
	176	if (gmtime_emulation_type == 0) {
	177	int dstnow;
	178	time_t base = 15 * 86400; /* 15jan71; to avoid month/year ends between */
	179	/* results of calls to gmtime() and localtime() */
	180	/* for same &base */
	181
	182	gmtime_emulation_type++;
	183	if ((tm_p = gmtime(&base)) == NULL) { /* CRTL gmtime() is a fake */
	184	char off[LNM$C_NAMLENGTH+1];;
	185
	186	gmtime_emulation_type++;
	187	if (!Perl_vmstrnenv("SYS$TIMEZONE_DIFFERENTIAL",off,0,fildev,0)) {
	188	gmtime_emulation_type++;
	189	utc_offset_secs = 0;
190	Perl_warn(aTHX_ "no UTC offset information; assuming local time is UTC");
191	}
192	else { utc_offset_secs = atol(off); }
193	}
194	else { /* We've got a working gmtime() */
195	struct tm gmt, local;
196
197	gmt = *tm_p;
198	tm_p = localtime(&base);
199	local = *tm_p;
200	utc_offset_secs = (local.tm_mday - gmt.tm_mday) * 86400;
201	utc_offset_secs += (local.tm_hour - gmt.tm_hour) * 3600;
202	utc_offset_secs += (local.tm_min - gmt.tm_min) * 60;
203	utc_offset_secs += (local.tm_sec - gmt.tm_sec);
204	}
205	}
206	return 1;
207	}
208
209
dcf686c9	210	int
	211	gettimeofday (struct timeval tp, void tpz)
	212	{
	213	long ret;
5cdb7193	214	#ifdef __VAX
3785778e	215	long quad[2];
	216	long quad1[2];
	217	long div_100ns_to_secs;
	218	long div_100ns_to_usecs;
	219	long quo,rem;
	220	long quo1,rem1;
5cdb7193	221	#else
dcf686c9	222	__int64 quad;
dcf686c9	223	__qdiv_t ans1,ans2;
5cdb7193	224	#endif
dcf686c9	225	/*
	226	In case of error, tv_usec = 0 and tv_sec = VMS condition code.
	227	The return from function is also set to -1.
	228	This is not exactly as per the manual page.
	229	*/
	230
	231	tp->tv_usec = 0;
	232
3785778e	233	#ifdef __VAX
	234	if (base_adjust[0]==0 && base_adjust[1]==0) {
	235	#else
dcf686c9	236	if (base_adjust==0) { /* Need to determine epoch adjustment */
3785778e	237	#endif
dcf686c9	238	ret=sys$bintim(&dscepoch,&base_adjust);
	239	if (1 != (ret &&1)) {
	240	tp->tv_sec = ret;
	241	return -1;
	242	}
	243	}
	244
	245	ret=sys$gettim(&quad); /* Get VMS system time */
	246	if ((1 && ret) == 1) {
5cdb7193	247	#ifdef __VAX
3785778e	248	quad[0] -= base_adjust[0]; /* convert to epoch offset */
	249	quad[1] -= base_adjust[1]; /* convert 2nd half of quadword */
	250	div_100ns_to_secs = DIV_100NS_TO_SECS;
	251	div_100ns_to_usecs = DIV_100NS_TO_USECS;
	252	lib$ediv(&div_100ns_to_secs,&quad,&quo,&rem);
	253	quad1[0] = rem;
	254	quad1[1] = 0L;
	255	lib$ediv(&div_100ns_to_usecs,&quad1,&quo1,&rem1);
	256	tp->tv_sec = quo; /* Whole seconds */
	257	tp->tv_usec = quo1; /* Micro-seconds */
5cdb7193	258	#else
3785778e	259	quad -= base_adjust; /* convert to epoch offset */
dcf686c9	260	ans1=qdiv(quad,DIV_100NS_TO_SECS);
	261	ans2=qdiv(ans1.rem,DIV_100NS_TO_USECS);
	262	tp->tv_sec = ans1.quot; /* Whole seconds */
	263	tp->tv_usec = ans2.quot; /* Micro-seconds */
3785778e	264	#endif
dcf686c9	265	} else {
	266	tp->tv_sec = ret;
	267	return -1;
	268	}
9b6f56ad	269	# ifdef VMSISH_TIME
	270	# ifdef RTL_USES_UTC
	271	if (VMSISH_TIME) tp->tv_sec = _toloc(tp->tv_sec);
	272	# else
	273	if (!VMSISH_TIME) tp->tv_sec = _toutc(tp->tv_sec);
	274	# endif
	275	# endif
dcf686c9	276	return 0;
	277	}
	278	#endif
	279
	280	#if !defined(HAS_USLEEP) && defined(HAS_SELECT)
	281	#ifndef SELECT_IS_BROKEN
	282	#define HAS_USLEEP
	283	#define usleep hrt_usleep /* could conflict with ncurses for static build */
	284
	285	void
	286	hrt_usleep(unsigned long usec)
	287	{
	288	struct timeval tv;
	289	tv.tv_sec = 0;
	290	tv.tv_usec = usec;
	291	select(0, (Select_fd_set_t)NULL, (Select_fd_set_t)NULL,
	292	(Select_fd_set_t)NULL, &tv);
	293	}
	294	#endif
	295	#endif
	296
	297	#if !defined(HAS_USLEEP) && defined(WIN32)
	298	#define HAS_USLEEP
	299	#define usleep hrt_usleep /* could conflict with ncurses for static build */
	300
	301	void
	302	hrt_usleep(unsigned long usec)
	303	{
	304	long msec;
	305	msec = usec / 1000;
	306	Sleep (msec);
	307	}
	308	#endif
	309
	310
	311	#if !defined(HAS_UALARM) && defined(HAS_SETITIMER)
	312	#define HAS_UALARM
	313	#define ualarm hrt_ualarm /* could conflict with ncurses for static build */
	314
	315	int
	316	hrt_ualarm(int usec, int interval)
	317	{
	318	struct itimerval itv;
	319	itv.it_value.tv_sec = usec / 1000000;
	320	itv.it_value.tv_usec = usec % 1000000;
	321	itv.it_interval.tv_sec = interval / 1000000;
	322	itv.it_interval.tv_usec = interval % 1000000;
	323	return setitimer(ITIMER_REAL, &itv, 0);
	324	}
	325	#endif
	326
	327	#ifdef HAS_GETTIMEOFDAY
	328
a2e20b18	329	static int
dcf686c9	330	myU2time(UV *ret)
	331	{
	332	struct timeval Tp;
	333	int status;
	334	status = gettimeofday (&Tp, NULL);
	335	ret[0] = Tp.tv_sec;
	336	ret[1] = Tp.tv_usec;
a2e20b18	337	return status;
dcf686c9	338	}
dcf686c9	339
3c72ec00	340	static NV
dcf686c9	341	myNVtime()
	342	{
	343	struct timeval Tp;
	344	int status;
	345	status = gettimeofday (&Tp, NULL);
a2e20b18	346	return status == 0 ? Tp.tv_sec + (Tp.tv_usec / 1000000.) : -1.0;
dcf686c9	347	}
	348
	349	#endif
	350
	351	MODULE = Time::HiRes PACKAGE = Time::HiRes
	352
	353	PROTOTYPES: ENABLE
	354
	355	BOOT:
dcf686c9	356	#ifdef HAS_GETTIMEOFDAY
a2e20b18	357	{
	358	UV auv[2];
	359	hv_store(PL_modglobal, "Time::NVtime", 12, newSViv((IV) myNVtime()), 0);
	360	if (myU2time(auv) == 0)
	361	hv_store(PL_modglobal, "Time::U2time", 12, newSViv((IV) auv[0]), 0);
	362	}
dcf686c9	363	#endif
dcf686c9	364
3c72ec00	365	IV
	366	constant(name, arg)
	367	char * name
	368	int arg
	369
52d72fba	370	#if defined(HAS_USLEEP) && defined(HAS_GETTIMEOFDAY)
dcf686c9	371
92bc48ca	372	NV
dcf686c9	373	usleep(useconds)
92bc48ca	374	NV useconds
52d72fba	375	PREINIT:
	376	struct timeval Ta, Tb;
	377	CODE:
	378	gettimeofday(&Ta, NULL);
	379	if (items > 0) {
92bc48ca	380	if (useconds > 1E6) {
92bc48ca	381	IV seconds = (IV) (useconds / 1E6);
f7916ddb	382	/* If usleep() has been implemented using setitimer()
	383	* then this contortion is unnecessary-- but usleep()
	384	* may be implemented in some other way, so let's contort. */
	385	if (seconds) {
	386	sleep(seconds);
	387	useconds -= 1E6 * seconds;
	388	}
	389	} else if (useconds < 0.0)
	390	croak("Time::HiRes::usleep(%"NVgf"): negative time not invented yet", useconds);
92bc48ca	391	usleep((UV)useconds);
52d72fba	392	} else
	393	PerlProc_pause();
	394	gettimeofday(&Tb, NULL);
92bc48ca	395	#if 0
	396	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
	397	#endif
	398	RETVAL = 1E6*(Tb.tv_sec-Ta.tv_sec)+(NV)((IV)Tb.tv_usec-(IV)Ta.tv_usec);
dcf686c9	399
52d72fba	400	OUTPUT:
	401	RETVAL
	402
	403	NV
f9d00e57	404	sleep(...)
52d72fba	405	PREINIT:
52d72fba	406	struct timeval Ta, Tb;
dcf686c9	407	CODE:
52d72fba	408	gettimeofday(&Ta, NULL);
92bc48ca	409	if (items > 0) {
92bc48ca	410	NV seconds = SvNV(ST(0));
f7916ddb	411	if (seconds >= 0.0) {
	412	UV useconds = 1E6 * (seconds - (UV)seconds);
	413	sleep((UV)seconds);
	414	usleep(useconds);
	415	} else
	416	croak("Time::HiRes::sleep(%"NVgf"): negative time not invented yet", seconds);
92bc48ca	417	} else
f9d00e57	418	PerlProc_pause();
52d72fba	419	gettimeofday(&Tb, NULL);
92bc48ca	420	#if 0
	421	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
	422	#endif
52d72fba	423	RETVAL = (NV)(Tb.tv_sec-Ta.tv_sec)+0.000001*(NV)(Tb.tv_usec-Ta.tv_usec);
	424
	425	OUTPUT:
	426	RETVAL
dcf686c9	427
	428	#endif
	429
	430	#ifdef HAS_UALARM
	431
3de7a4ec	432	int
dcf686c9	433	ualarm(useconds,interval=0)
	434	int useconds
	435	int interval
f7916ddb	436	CODE:
f7916ddb	437	if (useconds < 0 \|\| interval < 0)
3de7a4ec	438	croak("Time::HiRes::ualarm(%d, %d): negative time not invented yet", useconds, interval);
f7916ddb	439	RETVAL = ualarm(useconds, interval);
dcf686c9	440
f7916ddb	441	OUTPUT:
	442	RETVAL
	443
	444	NV
	445	alarm(seconds,interval=0)
	446	NV seconds
	447	NV interval
dcf686c9	448	CODE:
f7916ddb	449	if (seconds < 0.0 \|\| interval < 0.0)
	450	croak("Time::HiRes::alarm(%"NVgf", %"NVgf"): negative time not invented yet", seconds, interval);
	451	RETVAL = (NV)ualarm(seconds * 1000000,
	452	interval * 1000000) / 1E6;
dcf686c9	453
c6c619a9	454	OUTPUT:
	455	RETVAL
	456
dcf686c9	457	#endif
	458
	459	#ifdef HAS_GETTIMEOFDAY
db835671	460	# ifdef MACOS_TRADITIONAL /* fix epoch TZ and use unsigned time_t */
	461	void
	462	gettimeofday()
	463	PREINIT:
	464	struct timeval Tp;
	465	struct timezone Tz;
	466	PPCODE:
	467	int status;
	468	status = gettimeofday (&Tp, &Tz);
	469	Tp.tv_sec += Tz.tz_minuteswest * 60; /* adjust for TZ */
	470
	471	if (GIMME == G_ARRAY) {
	472	EXTEND(sp, 2);
	473	/* Mac OS (Classic) has unsigned time_t */
	474	PUSHs(sv_2mortal(newSVuv(Tp.tv_sec)));
	475	PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
	476	} else {
	477	EXTEND(sp, 1);
	478	PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
	479	}
	480
	481	NV
	482	time()
	483	PREINIT:
	484	struct timeval Tp;
	485	struct timezone Tz;
	486	CODE:
	487	int status;
	488	status = gettimeofday (&Tp, &Tz);
	489	Tp.tv_sec += Tz.tz_minuteswest * 60; /* adjust for TZ */
	490	RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.0);
	491	OUTPUT:
	492	RETVAL
dcf686c9	493
db835671	494	# else /* MACOS_TRADITIONAL */
dcf686c9	495	void
	496	gettimeofday()
	497	PREINIT:
	498	struct timeval Tp;
	499	PPCODE:
	500	int status;
	501	status = gettimeofday (&Tp, NULL);
	502	if (GIMME == G_ARRAY) {
	503	EXTEND(sp, 2);
	504	PUSHs(sv_2mortal(newSViv(Tp.tv_sec)));
	505	PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
	506	} else {
	507	EXTEND(sp, 1);
	508	PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
	509	}
	510
3c72ec00	511	NV
dcf686c9	512	time()
	513	PREINIT:
	514	struct timeval Tp;
	515	CODE:
	516	int status;
	517	status = gettimeofday (&Tp, NULL);
	518	RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.);
	519	OUTPUT:
	520	RETVAL
	521
db835671	522	# endif /* MACOS_TRADITIONAL */
dcf686c9	523	#endif
dcf686c9	524
3c72ec00	525	#if defined(HAS_GETITIMER) && defined(HAS_SETITIMER)
	526
	527	#define TV2NV(tv) ((NV)((tv).tv_sec) + 0.000001 * (NV)((tv).tv_usec))
	528
	529	void
	530	setitimer(which, seconds, interval = 0)
	531	int which
	532	NV seconds
	533	NV interval
	534	PREINIT:
	535	struct itimerval newit;
	536	struct itimerval oldit;
	537	PPCODE:
f7916ddb	538	if (seconds < 0.0 \|\| interval < 0.0)
f7916ddb	539	croak("Time::HiRes::setitimer(%"IVdf", %"NVgf", %"NVgf"): negative time not invented yet", which, seconds, interval);
3c72ec00	540	newit.it_value.tv_sec = seconds;
	541	newit.it_value.tv_usec =
	542	(seconds - (NV)newit.it_value.tv_sec) * 1000000.0;
	543	newit.it_interval.tv_sec = interval;
	544	newit.it_interval.tv_usec =
	545	(interval - (NV)newit.it_interval.tv_sec) * 1000000.0;
	546	if (setitimer(which, &newit, &oldit) == 0) {
	547	EXTEND(sp, 1);
	548	PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_value))));
	549	if (GIMME == G_ARRAY) {
	550	EXTEND(sp, 1);
	551	PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_interval))));
	552	}
	553	}
	554
	555	void
	556	getitimer(which)
	557	int which
	558	PREINIT:
	559	struct itimerval nowit;
	560	PPCODE:
	561	if (getitimer(which, &nowit) == 0) {
	562	EXTEND(sp, 1);
	563	PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_value))));
	564	if (GIMME == G_ARRAY) {
	565	EXTEND(sp, 1);
	566	PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_interval))));
	567	}
	568	}
	569
	570	#endif
	571
dcf686c9	572	# $Id: HiRes.xs,v 1.11 1999/03/16 02:27:38 wegscd Exp wegscd $
	573
	574	# $Log: HiRes.xs,v $
	575	# Revision 1.11 1999/03/16 02:27:38 wegscd
	576	# Add U2time, NVtime. Fix symbols for static link.
	577	#
	578	# Revision 1.10 1998/09/30 02:36:25 wegscd
	579	# Add VMS changes.
	580	#
	581	# Revision 1.9 1998/07/07 02:42:06 wegscd
	582	# Win32 usleep()
	583	#
	584	# Revision 1.8 1998/07/02 01:47:26 wegscd
	585	# Add Win32 code for gettimeofday.
	586	#
	587	# Revision 1.7 1997/11/13 02:08:12 wegscd
	588	# Add missing EXTEND in gettimeofday() scalar code.
	589	#
	590	# Revision 1.6 1997/11/11 02:32:35 wegscd
	591	# Do something useful when calling gettimeofday() in a scalar context.
	592	# The patch is courtesy of Gisle Aas.
	593	#
	594	# Revision 1.5 1997/11/06 03:10:47 wegscd
	595	# Fake ualarm() if we have setitimer.
	596	#
	597	# Revision 1.4 1997/11/05 05:41:23 wegscd
	598	# Turn prototypes ON (suggested by Gisle Aas)
	599	#
	600	# Revision 1.3 1997/10/13 20:56:15 wegscd
	601	# Add PROTOTYPES: DISABLE
	602	#
	603	# Revision 1.2 1997/05/23 01:01:38 wegscd
	604	# Conditional compilation, depending on what the OS gives us.
	605	#
	606	# Revision 1.1 1996/09/03 18:26:35 wegscd
	607	# Initial revision
	608	#
	609	#