[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 */
#ifdef __GNUC__
#define Const64(x) x##LL
#else
#define Const64(x) x##i64
#endif
#define EPOCH_BIAS  Const64(116444736000000000)

/* 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) / Const64(10000000));

    /* microseconds remaining */
    tp->tv_usec = (long)((ft.ft_i64 / Const64(10)) % Const64(1000000));

    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

#if !defined(HAS_UALARM) && defined(VMS)
#define HAS_UALARM
#define ualarm vms_ualarm 

#include <lib$routines.h>
#include <ssdef.h>
#include <starlet.h>
#include <descrip.h>
#include <signal.h>
#include <jpidef.h>
#include <psldef.h>

#define VMSERR(s)   (!((s)&1))

static void
us_to_VMS(useconds_t mseconds, unsigned long v[])
{
    int iss;
    unsigned long qq[2];

    qq[0] = mseconds;
    qq[1] = 0;
    v[0] = v[1] = 0;

    iss = lib$addx(qq,qq,qq);
    if (VMSERR(iss)) lib$signal(iss);
    iss = lib$subx(v,qq,v);
    if (VMSERR(iss)) lib$signal(iss);
    iss = lib$addx(qq,qq,qq);
    if (VMSERR(iss)) lib$signal(iss);
    iss = lib$subx(v,qq,v);
    if (VMSERR(iss)) lib$signal(iss);
    iss = lib$subx(v,qq,v);
    if (VMSERR(iss)) lib$signal(iss);
}

static int
VMS_to_us(unsigned long v[])
{
    int iss;
    unsigned long div=10,quot, rem;

    iss = lib$ediv(&div,v,&quot,&rem);
    if (VMSERR(iss)) lib$signal(iss);

    return quot;
}

typedef unsigned short word;
typedef struct _ualarm {
    int function;
    int repeat;
    unsigned long delay[2];
    unsigned long interval[2];
    unsigned long remain[2];
} Alarm;


static int alarm_ef;
static Alarm *a0, alarm_base;
#define UAL_NULL   0
#define UAL_SET    1
#define UAL_CLEAR  2
#define UAL_ACTIVE 4
static void ualarm_AST(Alarm *a);

static int 
vms_ualarm(int mseconds, int interval)
{
    Alarm *a, abase;
    struct item_list3 {
        word length;
        word code;
        void *bufaddr;
        void *retlenaddr;
    } ;
    static struct item_list3 itmlst[2];
    static int first = 1;
    unsigned long asten;
    int iss, enabled;

    if (first) {
        first = 0;
        itmlst[0].code       = JPI$_ASTEN;
        itmlst[0].length     = sizeof(asten);
        itmlst[0].retlenaddr = NULL;
        itmlst[1].code       = 0;
        itmlst[1].length     = 0;
        itmlst[1].bufaddr    = NULL;
        itmlst[1].retlenaddr = NULL;

        iss = lib$get_ef(&alarm_ef);
        if (VMSERR(iss)) lib$signal(iss);

        a0 = &alarm_base;
        a0->function = UAL_NULL;
    }
    itmlst[0].bufaddr    = &asten;
    
    iss = sys$getjpiw(0,0,0,itmlst,0,0,0);
    if (VMSERR(iss)) lib$signal(iss);
    if (!(asten&0x08)) return -1;

    a = &abase;
    if (mseconds) {
        a->function = UAL_SET;
    } else {
        a->function = UAL_CLEAR;
    }

    us_to_VMS(mseconds, a->delay);
    if (interval) {
        us_to_VMS(interval, a->interval);
        a->repeat = 1;
    } else 
        a->repeat = 0;

    iss = sys$clref(alarm_ef);
    if (VMSERR(iss)) lib$signal(iss);

    iss = sys$dclast(ualarm_AST,a,0);
    if (VMSERR(iss)) lib$signal(iss);

    iss = sys$waitfr(alarm_ef);
    if (VMSERR(iss)) lib$signal(iss);

    if (a->function == UAL_ACTIVE) 
        return VMS_to_us(a->remain);
    else
        return 0;
}


static void
ualarm_AST(Alarm *a)
{
    int iss;
    unsigned long now[2];

    iss = sys$gettim(now);
    if (VMSERR(iss)) lib$signal(iss);

    if (a->function == UAL_SET || a->function == UAL_CLEAR) {
        if (a0->function == UAL_ACTIVE) {
            iss = sys$cantim(a0,PSL$C_USER);
            if (VMSERR(iss)) lib$signal(iss);

            iss = lib$subx(a0->remain, now, a->remain);
            if (VMSERR(iss)) lib$signal(iss);

            if (a->remain[1] & 0x80000000) 
                a->remain[0] = a->remain[1] = 0;
        }

        if (a->function == UAL_SET) {
            a->function = a0->function;
            a0->function = UAL_ACTIVE;
            a0->repeat = a->repeat;
            if (a0->repeat) {
                a0->interval[0] = a->interval[0];
                a0->interval[1] = a->interval[1];
            }
            a0->delay[0] = a->delay[0];
            a0->delay[1] = a->delay[1];

            iss = lib$subx(now, a0->delay, a0->remain);
            if (VMSERR(iss)) lib$signal(iss);

            iss = sys$setimr(0,a0->delay,ualarm_AST,a0);
            if (VMSERR(iss)) lib$signal(iss);
        } else {
            a->function = a0->function;
            a0->function = UAL_NULL;
        }
        iss = sys$setef(alarm_ef);
        if (VMSERR(iss)) lib$signal(iss);
    } else if (a->function == UAL_ACTIVE) {
        if (a->repeat) {
            iss = lib$subx(now, a->interval, a->remain);
            if (VMSERR(iss)) lib$signal(iss);

            iss = sys$setimr(0,a->interval,ualarm_AST,a);
            if (VMSERR(iss)) lib$signal(iss);
        } else {
            a->function = UAL_NULL;
        }
        iss = sys$wake(0,0);
        if (VMSERR(iss)) lib$signal(iss);
        lib$signal(SS$_ASTFLT);
    } else {
        lib$signal(SS$_BADPARAM);
    }
}

#endif /* !HAS_UALARM && VMS */


#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 */
b4a4f8bf	72	#ifdef __GNUC__
	73	#define Const64(x) x##LL
	74	#else
	75	#define Const64(x) x##i64
	76	#endif
	77	#define EPOCH_BIAS Const64(116444736000000000)
eb1a5092	78
	79	/* NOTE: This does not compute the timezone info (doing so can be expensive,
	80	* and appears to be unsupported even by glibc) */
dcf686c9	81	int
eb1a5092	82	gettimeofday (struct timeval tp, void not_used)
dcf686c9	83	{
eb1a5092	84	FT_t ft;
	85
	86	/* this returns time in 100-nanosecond units (i.e. tens of usecs) */
	87	GetSystemTimeAsFileTime(&ft.ft_val);
	88
	89	/* seconds since epoch */
b4a4f8bf	90	tp->tv_sec = (long)((ft.ft_i64 - EPOCH_BIAS) / Const64(10000000));
eb1a5092	91
eb1a5092	92	/* microseconds remaining */
b4a4f8bf	93	tp->tv_usec = (long)((ft.ft_i64 / Const64(10)) % Const64(1000000));
eb1a5092	94
eb1a5092	95	return 0;
dcf686c9	96	}
	97	#endif
	98
	99	#if !defined(HAS_GETTIMEOFDAY) && defined(VMS)
	100	#define HAS_GETTIMEOFDAY
	101
9b6f56ad	102	#include <lnmdef.h>
dcf686c9	103	#include <time.h> /* gettimeofday */
	104	#include <stdlib.h> /* qdiv */
	105	#include <starlet.h> /* sys$gettim */
	106	#include <descrip.h>
3785778e	107	#ifdef __VAX
	108	#include <lib$routines.h> /* lib$ediv() */
	109	#endif
dcf686c9	110
	111	/*
	112	VMS binary time is expressed in 100 nano-seconds since
	113	system base time which is 17-NOV-1858 00:00:00.00
	114	*/
	115
	116	#define DIV_100NS_TO_SECS 10000000L
	117	#define DIV_100NS_TO_USECS 10L
	118
	119	/*
	120	gettimeofday is supposed to return times since the epoch
	121	so need to determine this in terms of VMS base time
	122	*/
	123	static $DESCRIPTOR(dscepoch,"01-JAN-1970 00:00:00.00");
	124
5cdb7193	125	#ifdef __VAX
3785778e	126	static long base_adjust[2]={0L,0L};
5cdb7193	127	#else
dcf686c9	128	static __int64 base_adjust=0;
5cdb7193	129	#endif
dcf686c9	130
9b6f56ad	131	/*
	132
	133	If we don't have gettimeofday, then likely we are on a VMS machine that
	134	operates on local time rather than UTC...so we have to zone-adjust.
	135	This code gleefully swiped from VMS.C
	136
	137	*/
	138	/* method used to handle UTC conversions:
	139	* 1 == CRTL gmtime(); 2 == SYS$TIMEZONE_DIFFERENTIAL; 3 == no correction
	140	*/
	141	static int gmtime_emulation_type;
	142	/* number of secs to add to UTC POSIX-style time to get local time */
	143	static long int utc_offset_secs;
	144	static struct dsc$descriptor_s fildevdsc =
	145	{ 12, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$FILE_DEV" };
	146	static struct dsc$descriptor_s *fildev[] = { &fildevdsc, NULL };
	147
	148	static time_t toutc_dst(time_t loc) {
	149	struct tm *rsltmp;
	150
	151	if ((rsltmp = localtime(&loc)) == NULL) return -1;
	152	loc -= utc_offset_secs;
	153	if (rsltmp->tm_isdst) loc -= 3600;
	154	return loc;
	155	}
	156
	157	static time_t toloc_dst(time_t utc) {
	158	struct tm *rsltmp;
	159
	160	utc += utc_offset_secs;
	161	if ((rsltmp = localtime(&utc)) == NULL) return -1;
	162	if (rsltmp->tm_isdst) utc += 3600;
	163	return utc;
	164	}
	165
	166	#define _toutc(secs) ((secs) == (time_t) -1 ? (time_t) -1 : \
	167	((gmtime_emulation_type \|\| timezone_setup()), \
	168	(gmtime_emulation_type == 1 ? toutc_dst(secs) : \
	169	((secs) - utc_offset_secs))))
	170
	171	#define _toloc(secs) ((secs) == (time_t) -1 ? (time_t) -1 : \
	172	((gmtime_emulation_type \|\| timezone_setup()), \
	173	(gmtime_emulation_type == 1 ? toloc_dst(secs) : \
	174	((secs) + utc_offset_secs))))
	175
	176	static int
	177	timezone_setup(void)
	178	{
	179	struct tm *tm_p;
	180
	181	if (gmtime_emulation_type == 0) {
	182	int dstnow;
	183	time_t base = 15 * 86400; /* 15jan71; to avoid month/year ends between */
	184	/* results of calls to gmtime() and localtime() */
	185	/* for same &base */
	186
	187	gmtime_emulation_type++;
	188	if ((tm_p = gmtime(&base)) == NULL) { /* CRTL gmtime() is a fake */
	189	char off[LNM$C_NAMLENGTH+1];;
	190
	191	gmtime_emulation_type++;
	192	if (!Perl_vmstrnenv("SYS$TIMEZONE_DIFFERENTIAL",off,0,fildev,0)) {
	193	gmtime_emulation_type++;
	194	utc_offset_secs = 0;
195	Perl_warn(aTHX_ "no UTC offset information; assuming local time is UTC");
196	}
197	else { utc_offset_secs = atol(off); }
198	}
199	else { /* We've got a working gmtime() */
200	struct tm gmt, local;
201
202	gmt = *tm_p;
203	tm_p = localtime(&base);
204	local = *tm_p;
205	utc_offset_secs = (local.tm_mday - gmt.tm_mday) * 86400;
206	utc_offset_secs += (local.tm_hour - gmt.tm_hour) * 3600;
207	utc_offset_secs += (local.tm_min - gmt.tm_min) * 60;
208	utc_offset_secs += (local.tm_sec - gmt.tm_sec);
209	}
210	}
211	return 1;
212	}
213
214
dcf686c9	215	int
	216	gettimeofday (struct timeval tp, void tpz)
	217	{
	218	long ret;
5cdb7193	219	#ifdef __VAX
3785778e	220	long quad[2];
	221	long quad1[2];
	222	long div_100ns_to_secs;
	223	long div_100ns_to_usecs;
	224	long quo,rem;
	225	long quo1,rem1;
5cdb7193	226	#else
dcf686c9	227	__int64 quad;
dcf686c9	228	__qdiv_t ans1,ans2;
5cdb7193	229	#endif
dcf686c9	230	/*
	231	In case of error, tv_usec = 0 and tv_sec = VMS condition code.
	232	The return from function is also set to -1.
	233	This is not exactly as per the manual page.
	234	*/
	235
	236	tp->tv_usec = 0;
	237
3785778e	238	#ifdef __VAX
	239	if (base_adjust[0]==0 && base_adjust[1]==0) {
	240	#else
dcf686c9	241	if (base_adjust==0) { /* Need to determine epoch adjustment */
3785778e	242	#endif
dcf686c9	243	ret=sys$bintim(&dscepoch,&base_adjust);
	244	if (1 != (ret &&1)) {
	245	tp->tv_sec = ret;
	246	return -1;
	247	}
	248	}
	249
	250	ret=sys$gettim(&quad); /* Get VMS system time */
	251	if ((1 && ret) == 1) {
5cdb7193	252	#ifdef __VAX
3785778e	253	quad[0] -= base_adjust[0]; /* convert to epoch offset */
	254	quad[1] -= base_adjust[1]; /* convert 2nd half of quadword */
	255	div_100ns_to_secs = DIV_100NS_TO_SECS;
	256	div_100ns_to_usecs = DIV_100NS_TO_USECS;
	257	lib$ediv(&div_100ns_to_secs,&quad,&quo,&rem);
	258	quad1[0] = rem;
	259	quad1[1] = 0L;
	260	lib$ediv(&div_100ns_to_usecs,&quad1,&quo1,&rem1);
	261	tp->tv_sec = quo; /* Whole seconds */
	262	tp->tv_usec = quo1; /* Micro-seconds */
5cdb7193	263	#else
3785778e	264	quad -= base_adjust; /* convert to epoch offset */
dcf686c9	265	ans1=qdiv(quad,DIV_100NS_TO_SECS);
	266	ans2=qdiv(ans1.rem,DIV_100NS_TO_USECS);
	267	tp->tv_sec = ans1.quot; /* Whole seconds */
	268	tp->tv_usec = ans2.quot; /* Micro-seconds */
3785778e	269	#endif
dcf686c9	270	} else {
	271	tp->tv_sec = ret;
	272	return -1;
	273	}
9b6f56ad	274	# ifdef VMSISH_TIME
	275	# ifdef RTL_USES_UTC
	276	if (VMSISH_TIME) tp->tv_sec = _toloc(tp->tv_sec);
	277	# else
	278	if (!VMSISH_TIME) tp->tv_sec = _toutc(tp->tv_sec);
	279	# endif
	280	# endif
dcf686c9	281	return 0;
	282	}
	283	#endif
	284
	285	#if !defined(HAS_USLEEP) && defined(HAS_SELECT)
	286	#ifndef SELECT_IS_BROKEN
	287	#define HAS_USLEEP
	288	#define usleep hrt_usleep /* could conflict with ncurses for static build */
	289
	290	void
	291	hrt_usleep(unsigned long usec)
	292	{
	293	struct timeval tv;
	294	tv.tv_sec = 0;
	295	tv.tv_usec = usec;
	296	select(0, (Select_fd_set_t)NULL, (Select_fd_set_t)NULL,
	297	(Select_fd_set_t)NULL, &tv);
	298	}
	299	#endif
	300	#endif
	301
	302	#if !defined(HAS_USLEEP) && defined(WIN32)
	303	#define HAS_USLEEP
	304	#define usleep hrt_usleep /* could conflict with ncurses for static build */
	305
	306	void
	307	hrt_usleep(unsigned long usec)
	308	{
	309	long msec;
	310	msec = usec / 1000;
	311	Sleep (msec);
	312	}
	313	#endif
	314
	315
	316	#if !defined(HAS_UALARM) && defined(HAS_SETITIMER)
	317	#define HAS_UALARM
	318	#define ualarm hrt_ualarm /* could conflict with ncurses for static build */
	319
	320	int
	321	hrt_ualarm(int usec, int interval)
	322	{
	323	struct itimerval itv;
	324	itv.it_value.tv_sec = usec / 1000000;
	325	itv.it_value.tv_usec = usec % 1000000;
	326	itv.it_interval.tv_sec = interval / 1000000;
	327	itv.it_interval.tv_usec = interval % 1000000;
	328	return setitimer(ITIMER_REAL, &itv, 0);
	329	}
	330	#endif
	331
ca40fe49	332	#if !defined(HAS_UALARM) && defined(VMS)
	333	#define HAS_UALARM
	334	#define ualarm vms_ualarm
	335
	336	#include <lib$routines.h>
	337	#include <ssdef.h>
	338	#include <starlet.h>
	339	#include <descrip.h>
	340	#include <signal.h>
	341	#include <jpidef.h>
	342	#include <psldef.h>
	343
	344	#define VMSERR(s) (!((s)&1))
	345
	346	static void
	347	us_to_VMS(useconds_t mseconds, unsigned long v[])
	348	{
	349	int iss;
	350	unsigned long qq[2];
	351
	352	qq[0] = mseconds;
	353	qq[1] = 0;
	354	v[0] = v[1] = 0;
	355
	356	iss = lib$addx(qq,qq,qq);
	357	if (VMSERR(iss)) lib$signal(iss);
	358	iss = lib$subx(v,qq,v);
	359	if (VMSERR(iss)) lib$signal(iss);
	360	iss = lib$addx(qq,qq,qq);
	361	if (VMSERR(iss)) lib$signal(iss);
	362	iss = lib$subx(v,qq,v);
	363	if (VMSERR(iss)) lib$signal(iss);
	364	iss = lib$subx(v,qq,v);
	365	if (VMSERR(iss)) lib$signal(iss);
	366	}
	367
	368	static int
	369	VMS_to_us(unsigned long v[])
	370	{
	371	int iss;
	372	unsigned long div=10,quot, rem;
	373
	374	iss = lib$ediv(&div,v,&quot,&rem);
	375	if (VMSERR(iss)) lib$signal(iss);
	376
	377	return quot;
	378	}
	379
	380	typedef unsigned short word;
	381	typedef struct _ualarm {
	382	int function;
	383	int repeat;
	384	unsigned long delay[2];
	385	unsigned long interval[2];
	386	unsigned long remain[2];
	387	} Alarm;
	388
	389
	390	static int alarm_ef;
	391	static Alarm *a0, alarm_base;
	392	#define UAL_NULL 0
	393	#define UAL_SET 1
	394	#define UAL_CLEAR 2
	395	#define UAL_ACTIVE 4
396	static void ualarm_AST(Alarm *a);
397
398	static int
399	vms_ualarm(int mseconds, int interval)
400	{
401	Alarm *a, abase;
402	struct item_list3 {
403	word length;
404	word code;
405	void *bufaddr;
406	void *retlenaddr;
407	} ;
408	static struct item_list3 itmlst[2];
409	static int first = 1;
410	unsigned long asten;
411	int iss, enabled;
412
413	if (first) {
414	first = 0;
415	itmlst[0].code = JPI$_ASTEN;
416	itmlst[0].length = sizeof(asten);
417	itmlst[0].retlenaddr = NULL;
418	itmlst[1].code = 0;
419	itmlst[1].length = 0;
420	itmlst[1].bufaddr = NULL;
421	itmlst[1].retlenaddr = NULL;
422
423	iss = lib$get_ef(&alarm_ef);
424	if (VMSERR(iss)) lib$signal(iss);
425
426	a0 = &alarm_base;
427	a0->function = UAL_NULL;
428	}
429	itmlst[0].bufaddr = &asten;
430
431	iss = sys$getjpiw(0,0,0,itmlst,0,0,0);
432	if (VMSERR(iss)) lib$signal(iss);
433	if (!(asten&0x08)) return -1;
434
435	a = &abase;
436	if (mseconds) {
437	a->function = UAL_SET;
438	} else {
439	a->function = UAL_CLEAR;
440	}
441
442	us_to_VMS(mseconds, a->delay);
443	if (interval) {
444	us_to_VMS(interval, a->interval);
445	a->repeat = 1;
446	} else
447	a->repeat = 0;
448
449	iss = sys$clref(alarm_ef);
450	if (VMSERR(iss)) lib$signal(iss);
451
452	iss = sys$dclast(ualarm_AST,a,0);
453	if (VMSERR(iss)) lib$signal(iss);
454
455	iss = sys$waitfr(alarm_ef);
456	if (VMSERR(iss)) lib$signal(iss);
457
458	if (a->function == UAL_ACTIVE)
459	return VMS_to_us(a->remain);
460	else
461	return 0;
462	}
463
464
465
466	static void
467	ualarm_AST(Alarm *a)
468	{
469	int iss;
470	unsigned long now[2];
471
472	iss = sys$gettim(now);
473	if (VMSERR(iss)) lib$signal(iss);
474
475	if (a->function == UAL_SET \|\| a->function == UAL_CLEAR) {
476	if (a0->function == UAL_ACTIVE) {
477	iss = sys$cantim(a0,PSL$C_USER);
478	if (VMSERR(iss)) lib$signal(iss);
479
480	iss = lib$subx(a0->remain, now, a->remain);
481	if (VMSERR(iss)) lib$signal(iss);
482
483	if (a->remain[1] & 0x80000000)
484	a->remain[0] = a->remain[1] = 0;
485	}
486
487	if (a->function == UAL_SET) {
488	a->function = a0->function;
489	a0->function = UAL_ACTIVE;
490	a0->repeat = a->repeat;
491	if (a0->repeat) {
492	a0->interval[0] = a->interval[0];
493	a0->interval[1] = a->interval[1];
494	}
495	a0->delay[0] = a->delay[0];
496	a0->delay[1] = a->delay[1];
497
498	iss = lib$subx(now, a0->delay, a0->remain);
499	if (VMSERR(iss)) lib$signal(iss);
500
501	iss = sys$setimr(0,a0->delay,ualarm_AST,a0);
502	if (VMSERR(iss)) lib$signal(iss);
503	} else {
504	a->function = a0->function;
505	a0->function = UAL_NULL;
506	}
507	iss = sys$setef(alarm_ef);
508	if (VMSERR(iss)) lib$signal(iss);
509	} else if (a->function == UAL_ACTIVE) {
510	if (a->repeat) {
511	iss = lib$subx(now, a->interval, a->remain);
512	if (VMSERR(iss)) lib$signal(iss);
513
514	iss = sys$setimr(0,a->interval,ualarm_AST,a);
515	if (VMSERR(iss)) lib$signal(iss);
516	} else {
517	a->function = UAL_NULL;
518	}
519	iss = sys$wake(0,0);
520	if (VMSERR(iss)) lib$signal(iss);
521	lib$signal(SS$_ASTFLT);
522	} else {
523	lib$signal(SS$_BADPARAM);
524	}
525	}
526
527	#endif /* !HAS_UALARM && VMS */
528
529
530
dcf686c9	531	#ifdef HAS_GETTIMEOFDAY
dcf686c9	532
a2e20b18	533	static int
dcf686c9	534	myU2time(UV *ret)
	535	{
	536	struct timeval Tp;
	537	int status;
	538	status = gettimeofday (&Tp, NULL);
	539	ret[0] = Tp.tv_sec;
	540	ret[1] = Tp.tv_usec;
a2e20b18	541	return status;
dcf686c9	542	}
dcf686c9	543
3c72ec00	544	static NV
dcf686c9	545	myNVtime()
	546	{
	547	struct timeval Tp;
	548	int status;
	549	status = gettimeofday (&Tp, NULL);
a2e20b18	550	return status == 0 ? Tp.tv_sec + (Tp.tv_usec / 1000000.) : -1.0;
dcf686c9	551	}
	552
	553	#endif
	554
	555	MODULE = Time::HiRes PACKAGE = Time::HiRes
	556
	557	PROTOTYPES: ENABLE
	558
	559	BOOT:
dcf686c9	560	#ifdef HAS_GETTIMEOFDAY
a2e20b18	561	{
	562	UV auv[2];
	563	hv_store(PL_modglobal, "Time::NVtime", 12, newSViv((IV) myNVtime()), 0);
	564	if (myU2time(auv) == 0)
	565	hv_store(PL_modglobal, "Time::U2time", 12, newSViv((IV) auv[0]), 0);
	566	}
dcf686c9	567	#endif
dcf686c9	568
3c72ec00	569	IV
	570	constant(name, arg)
	571	char * name
	572	int arg
	573
52d72fba	574	#if defined(HAS_USLEEP) && defined(HAS_GETTIMEOFDAY)
dcf686c9	575
92bc48ca	576	NV
dcf686c9	577	usleep(useconds)
92bc48ca	578	NV useconds
52d72fba	579	PREINIT:
	580	struct timeval Ta, Tb;
	581	CODE:
	582	gettimeofday(&Ta, NULL);
	583	if (items > 0) {
92bc48ca	584	if (useconds > 1E6) {
92bc48ca	585	IV seconds = (IV) (useconds / 1E6);
f7916ddb	586	/* If usleep() has been implemented using setitimer()
	587	* then this contortion is unnecessary-- but usleep()
	588	* may be implemented in some other way, so let's contort. */
	589	if (seconds) {
	590	sleep(seconds);
	591	useconds -= 1E6 * seconds;
	592	}
	593	} else if (useconds < 0.0)
	594	croak("Time::HiRes::usleep(%"NVgf"): negative time not invented yet", useconds);
92bc48ca	595	usleep((UV)useconds);
52d72fba	596	} else
	597	PerlProc_pause();
	598	gettimeofday(&Tb, NULL);
92bc48ca	599	#if 0
	600	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
	601	#endif
	602	RETVAL = 1E6*(Tb.tv_sec-Ta.tv_sec)+(NV)((IV)Tb.tv_usec-(IV)Ta.tv_usec);
dcf686c9	603
52d72fba	604	OUTPUT:
	605	RETVAL
	606
	607	NV
f9d00e57	608	sleep(...)
52d72fba	609	PREINIT:
52d72fba	610	struct timeval Ta, Tb;
dcf686c9	611	CODE:
52d72fba	612	gettimeofday(&Ta, NULL);
92bc48ca	613	if (items > 0) {
92bc48ca	614	NV seconds = SvNV(ST(0));
f7916ddb	615	if (seconds >= 0.0) {
	616	UV useconds = 1E6 * (seconds - (UV)seconds);
	617	sleep((UV)seconds);
	618	usleep(useconds);
	619	} else
	620	croak("Time::HiRes::sleep(%"NVgf"): negative time not invented yet", seconds);
92bc48ca	621	} else
f9d00e57	622	PerlProc_pause();
52d72fba	623	gettimeofday(&Tb, NULL);
92bc48ca	624	#if 0
	625	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
	626	#endif
52d72fba	627	RETVAL = (NV)(Tb.tv_sec-Ta.tv_sec)+0.000001*(NV)(Tb.tv_usec-Ta.tv_usec);
	628
	629	OUTPUT:
	630	RETVAL
dcf686c9	631
	632	#endif
	633
	634	#ifdef HAS_UALARM
	635
3de7a4ec	636	int
dcf686c9	637	ualarm(useconds,interval=0)
	638	int useconds
	639	int interval
f7916ddb	640	CODE:
f7916ddb	641	if (useconds < 0 \|\| interval < 0)
3de7a4ec	642	croak("Time::HiRes::ualarm(%d, %d): negative time not invented yet", useconds, interval);
f7916ddb	643	RETVAL = ualarm(useconds, interval);
dcf686c9	644
f7916ddb	645	OUTPUT:
	646	RETVAL
	647
	648	NV
	649	alarm(seconds,interval=0)
	650	NV seconds
	651	NV interval
dcf686c9	652	CODE:
f7916ddb	653	if (seconds < 0.0 \|\| interval < 0.0)
	654	croak("Time::HiRes::alarm(%"NVgf", %"NVgf"): negative time not invented yet", seconds, interval);
	655	RETVAL = (NV)ualarm(seconds * 1000000,
	656	interval * 1000000) / 1E6;
dcf686c9	657
c6c619a9	658	OUTPUT:
	659	RETVAL
	660
dcf686c9	661	#endif
	662
	663	#ifdef HAS_GETTIMEOFDAY
db835671	664	# ifdef MACOS_TRADITIONAL /* fix epoch TZ and use unsigned time_t */
	665	void
	666	gettimeofday()
	667	PREINIT:
	668	struct timeval Tp;
	669	struct timezone Tz;
	670	PPCODE:
	671	int status;
	672	status = gettimeofday (&Tp, &Tz);
	673	Tp.tv_sec += Tz.tz_minuteswest * 60; /* adjust for TZ */
	674
	675	if (GIMME == G_ARRAY) {
	676	EXTEND(sp, 2);
	677	/* Mac OS (Classic) has unsigned time_t */
	678	PUSHs(sv_2mortal(newSVuv(Tp.tv_sec)));
	679	PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
	680	} else {
	681	EXTEND(sp, 1);
	682	PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
	683	}
	684
	685	NV
	686	time()
	687	PREINIT:
	688	struct timeval Tp;
	689	struct timezone Tz;
	690	CODE:
	691	int status;
	692	status = gettimeofday (&Tp, &Tz);
	693	Tp.tv_sec += Tz.tz_minuteswest * 60; /* adjust for TZ */
	694	RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.0);
	695	OUTPUT:
	696	RETVAL
dcf686c9	697
db835671	698	# else /* MACOS_TRADITIONAL */
dcf686c9	699	void
	700	gettimeofday()
	701	PREINIT:
	702	struct timeval Tp;
	703	PPCODE:
	704	int status;
	705	status = gettimeofday (&Tp, NULL);
	706	if (GIMME == G_ARRAY) {
	707	EXTEND(sp, 2);
	708	PUSHs(sv_2mortal(newSViv(Tp.tv_sec)));
	709	PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
	710	} else {
	711	EXTEND(sp, 1);
	712	PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
	713	}
	714
3c72ec00	715	NV
dcf686c9	716	time()
	717	PREINIT:
	718	struct timeval Tp;
	719	CODE:
	720	int status;
	721	status = gettimeofday (&Tp, NULL);
	722	RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.);
	723	OUTPUT:
	724	RETVAL
	725
db835671	726	# endif /* MACOS_TRADITIONAL */
dcf686c9	727	#endif
dcf686c9	728
3c72ec00	729	#if defined(HAS_GETITIMER) && defined(HAS_SETITIMER)
	730
	731	#define TV2NV(tv) ((NV)((tv).tv_sec) + 0.000001 * (NV)((tv).tv_usec))
	732
	733	void
	734	setitimer(which, seconds, interval = 0)
	735	int which
	736	NV seconds
	737	NV interval
	738	PREINIT:
	739	struct itimerval newit;
	740	struct itimerval oldit;
	741	PPCODE:
f7916ddb	742	if (seconds < 0.0 \|\| interval < 0.0)
f7916ddb	743	croak("Time::HiRes::setitimer(%"IVdf", %"NVgf", %"NVgf"): negative time not invented yet", which, seconds, interval);
3c72ec00	744	newit.it_value.tv_sec = seconds;
	745	newit.it_value.tv_usec =
	746	(seconds - (NV)newit.it_value.tv_sec) * 1000000.0;
	747	newit.it_interval.tv_sec = interval;
	748	newit.it_interval.tv_usec =
	749	(interval - (NV)newit.it_interval.tv_sec) * 1000000.0;
	750	if (setitimer(which, &newit, &oldit) == 0) {
	751	EXTEND(sp, 1);
	752	PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_value))));
	753	if (GIMME == G_ARRAY) {
	754	EXTEND(sp, 1);
	755	PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_interval))));
	756	}
	757	}
	758
	759	void
	760	getitimer(which)
	761	int which
	762	PREINIT:
	763	struct itimerval nowit;
	764	PPCODE:
	765	if (getitimer(which, &nowit) == 0) {
	766	EXTEND(sp, 1);
	767	PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_value))));
	768	if (GIMME == G_ARRAY) {
	769	EXTEND(sp, 1);
	770	PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_interval))));
	771	}
	772	}
	773
	774	#endif
	775
dcf686c9	776	# $Id: HiRes.xs,v 1.11 1999/03/16 02:27:38 wegscd Exp wegscd $
	777
	778	# $Log: HiRes.xs,v $
	779	# Revision 1.11 1999/03/16 02:27:38 wegscd
	780	# Add U2time, NVtime. Fix symbols for static link.
	781	#
	782	# Revision 1.10 1998/09/30 02:36:25 wegscd
	783	# Add VMS changes.
	784	#
	785	# Revision 1.9 1998/07/07 02:42:06 wegscd
	786	# Win32 usleep()
	787	#
	788	# Revision 1.8 1998/07/02 01:47:26 wegscd
	789	# Add Win32 code for gettimeofday.
	790	#
	791	# Revision 1.7 1997/11/13 02:08:12 wegscd
	792	# Add missing EXTEND in gettimeofday() scalar code.
	793	#
	794	# Revision 1.6 1997/11/11 02:32:35 wegscd
	795	# Do something useful when calling gettimeofday() in a scalar context.
	796	# The patch is courtesy of Gisle Aas.
	797	#
	798	# Revision 1.5 1997/11/06 03:10:47 wegscd
	799	# Fake ualarm() if we have setitimer.
	800	#
	801	# Revision 1.4 1997/11/05 05:41:23 wegscd
	802	# Turn prototypes ON (suggested by Gisle Aas)
	803	#
	804	# Revision 1.3 1997/10/13 20:56:15 wegscd
	805	# Add PROTOTYPES: DISABLE
	806	#
	807	# Revision 1.2 1997/05/23 01:01:38 wegscd
	808	# Conditional compilation, depending on what the OS gives us.
	809	#
	810	# Revision 1.1 1996/09/03 18:26:35 wegscd
	811	# Initial revision
	812	#
	813	#