[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 HAS_SELECT
# ifdef I_SYS_SELECT
#  include <sys/select.h>
# endif
#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(PTR2IV(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 = (UV)(1E6 * (seconds - (UV)seconds));
		 if (seconds >= 1.0)
		     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
36df99d6	12	#ifdef HAS_SELECT
	13	# ifdef I_SYS_SELECT
	14	# include <sys/select.h>
	15	# endif
	16	#endif
dcf686c9	17	#ifdef __cplusplus
	18	}
	19	#endif
	20
3c72ec00	21	static IV
	22	constant(char *name, int arg)
	23	{
	24	errno = 0;
	25	switch (*name) {
	26	case 'I':
	27	if (strEQ(name, "ITIMER_REAL"))
	28	#ifdef ITIMER_REAL
	29	return ITIMER_REAL;
	30	#else
	31	goto not_there;
	32	#endif
	33	if (strEQ(name, "ITIMER_REALPROF"))
	34	#ifdef ITIMER_REALPROF
	35	return ITIMER_REALPROF;
	36	#else
	37	goto not_there;
	38	#endif
	39	if (strEQ(name, "ITIMER_VIRTUAL"))
	40	#ifdef ITIMER_VIRTUAL
	41	return ITIMER_VIRTUAL;
	42	#else
	43	goto not_there;
	44	#endif
	45	if (strEQ(name, "ITIMER_PROF"))
	46	#ifdef ITIMER_PROF
	47	return ITIMER_PROF;
	48	#else
	49	goto not_there;
	50	#endif
	51	break;
	52	}
	53	errno = EINVAL;
	54	return 0;
	55
	56	not_there:
	57	errno = ENOENT;
	58	return 0;
	59	}
	60
fd44fdfd	61	#if !defined(HAS_GETTIMEOFDAY) && defined(WIN32)
	62	#define HAS_GETTIMEOFDAY
	63
6e3b076d	64	/* shows up in winsock.h?
	65	struct timeval {
	66	long tv_sec;
	67	long tv_usec;
	68	}
	69	*/
	70
fd44fdfd	71	typedef union {
	72	unsigned __int64 ft_i64;
	73	FILETIME ft_val;
	74	} FT_t;
	75
6e3b076d	76	/* Number of 100 nanosecond units from 1/1/1601 to 1/1/1970 */
fd44fdfd	77	#ifdef __GNUC__
	78	#define Const64(x) x##LL
	79	#else
	80	#define Const64(x) x##i64
	81	#endif
fd44fdfd	82	#define EPOCH_BIAS Const64(116444736000000000)
	83
	84	/* NOTE: This does not compute the timezone info (doing so can be expensive,
	85	* and appears to be unsupported even by glibc) */
6e3b076d	86	int
6e3b076d	87	gettimeofday (struct timeval tp, void not_used)
fd44fdfd	88	{
	89	FT_t ft;
	90
	91	/* this returns time in 100-nanosecond units (i.e. tens of usecs) */
	92	GetSystemTimeAsFileTime(&ft.ft_val);
	93
	94	/* seconds since epoch */
	95	tp->tv_sec = (long)((ft.ft_i64 - EPOCH_BIAS) / Const64(10000000));
	96
	97	/* microseconds remaining */
	98	tp->tv_usec = (long)((ft.ft_i64 / Const64(10)) % Const64(1000000));
	99
	100	return 0;
	101	}
6e3b076d	102	#endif
fd44fdfd	103
dcf686c9	104	#if !defined(HAS_GETTIMEOFDAY) && defined(VMS)
	105	#define HAS_GETTIMEOFDAY
	106
9b6f56ad	107	#include <lnmdef.h>
dcf686c9	108	#include <time.h> /* gettimeofday */
	109	#include <stdlib.h> /* qdiv */
	110	#include <starlet.h> /* sys$gettim */
	111	#include <descrip.h>
3785778e	112	#ifdef __VAX
	113	#include <lib$routines.h> /* lib$ediv() */
	114	#endif
dcf686c9	115
	116	/*
	117	VMS binary time is expressed in 100 nano-seconds since
	118	system base time which is 17-NOV-1858 00:00:00.00
	119	*/
	120
	121	#define DIV_100NS_TO_SECS 10000000L
	122	#define DIV_100NS_TO_USECS 10L
	123
	124	/*
	125	gettimeofday is supposed to return times since the epoch
	126	so need to determine this in terms of VMS base time
	127	*/
	128	static $DESCRIPTOR(dscepoch,"01-JAN-1970 00:00:00.00");
	129
5cdb7193	130	#ifdef __VAX
3785778e	131	static long base_adjust[2]={0L,0L};
5cdb7193	132	#else
dcf686c9	133	static __int64 base_adjust=0;
5cdb7193	134	#endif
dcf686c9	135
9b6f56ad	136	/*
	137
	138	If we don't have gettimeofday, then likely we are on a VMS machine that
	139	operates on local time rather than UTC...so we have to zone-adjust.
	140	This code gleefully swiped from VMS.C
	141
	142	*/
	143	/* method used to handle UTC conversions:
	144	* 1 == CRTL gmtime(); 2 == SYS$TIMEZONE_DIFFERENTIAL; 3 == no correction
	145	*/
	146	static int gmtime_emulation_type;
	147	/* number of secs to add to UTC POSIX-style time to get local time */
	148	static long int utc_offset_secs;
	149	static struct dsc$descriptor_s fildevdsc =
	150	{ 12, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$FILE_DEV" };
	151	static struct dsc$descriptor_s *fildev[] = { &fildevdsc, NULL };
	152
	153	static time_t toutc_dst(time_t loc) {
	154	struct tm *rsltmp;
	155
	156	if ((rsltmp = localtime(&loc)) == NULL) return -1;
	157	loc -= utc_offset_secs;
	158	if (rsltmp->tm_isdst) loc -= 3600;
	159	return loc;
	160	}
	161
	162	static time_t toloc_dst(time_t utc) {
	163	struct tm *rsltmp;
	164
	165	utc += utc_offset_secs;
	166	if ((rsltmp = localtime(&utc)) == NULL) return -1;
	167	if (rsltmp->tm_isdst) utc += 3600;
	168	return utc;
	169	}
	170
	171	#define _toutc(secs) ((secs) == (time_t) -1 ? (time_t) -1 : \
	172	((gmtime_emulation_type \|\| timezone_setup()), \
	173	(gmtime_emulation_type == 1 ? toutc_dst(secs) : \
	174	((secs) - utc_offset_secs))))
	175
	176	#define _toloc(secs) ((secs) == (time_t) -1 ? (time_t) -1 : \
	177	((gmtime_emulation_type \|\| timezone_setup()), \
	178	(gmtime_emulation_type == 1 ? toloc_dst(secs) : \
	179	((secs) + utc_offset_secs))))
	180
	181	static int
	182	timezone_setup(void)
	183	{
	184	struct tm *tm_p;
	185
	186	if (gmtime_emulation_type == 0) {
	187	int dstnow;
	188	time_t base = 15 * 86400; /* 15jan71; to avoid month/year ends between */
	189	/* results of calls to gmtime() and localtime() */
	190	/* for same &base */
	191
	192	gmtime_emulation_type++;
	193	if ((tm_p = gmtime(&base)) == NULL) { /* CRTL gmtime() is a fake */
	194	char off[LNM$C_NAMLENGTH+1];;
	195
	196	gmtime_emulation_type++;
	197	if (!Perl_vmstrnenv("SYS$TIMEZONE_DIFFERENTIAL",off,0,fildev,0)) {
	198	gmtime_emulation_type++;
	199	utc_offset_secs = 0;
200	Perl_warn(aTHX_ "no UTC offset information; assuming local time is UTC");
201	}
202	else { utc_offset_secs = atol(off); }
203	}
204	else { /* We've got a working gmtime() */
205	struct tm gmt, local;
206
207	gmt = *tm_p;
208	tm_p = localtime(&base);
209	local = *tm_p;
210	utc_offset_secs = (local.tm_mday - gmt.tm_mday) * 86400;
211	utc_offset_secs += (local.tm_hour - gmt.tm_hour) * 3600;
212	utc_offset_secs += (local.tm_min - gmt.tm_min) * 60;
213	utc_offset_secs += (local.tm_sec - gmt.tm_sec);
214	}
215	}
216	return 1;
217	}
218
219
dcf686c9	220	int
	221	gettimeofday (struct timeval tp, void tpz)
	222	{
	223	long ret;
5cdb7193	224	#ifdef __VAX
3785778e	225	long quad[2];
	226	long quad1[2];
	227	long div_100ns_to_secs;
	228	long div_100ns_to_usecs;
	229	long quo,rem;
	230	long quo1,rem1;
5cdb7193	231	#else
dcf686c9	232	__int64 quad;
dcf686c9	233	__qdiv_t ans1,ans2;
5cdb7193	234	#endif
dcf686c9	235	/*
	236	In case of error, tv_usec = 0 and tv_sec = VMS condition code.
	237	The return from function is also set to -1.
	238	This is not exactly as per the manual page.
	239	*/
	240
	241	tp->tv_usec = 0;
	242
3785778e	243	#ifdef __VAX
	244	if (base_adjust[0]==0 && base_adjust[1]==0) {
	245	#else
dcf686c9	246	if (base_adjust==0) { /* Need to determine epoch adjustment */
3785778e	247	#endif
dcf686c9	248	ret=sys$bintim(&dscepoch,&base_adjust);
	249	if (1 != (ret &&1)) {
	250	tp->tv_sec = ret;
	251	return -1;
	252	}
	253	}
	254
	255	ret=sys$gettim(&quad); /* Get VMS system time */
	256	if ((1 && ret) == 1) {
5cdb7193	257	#ifdef __VAX
3785778e	258	quad[0] -= base_adjust[0]; /* convert to epoch offset */
	259	quad[1] -= base_adjust[1]; /* convert 2nd half of quadword */
	260	div_100ns_to_secs = DIV_100NS_TO_SECS;
	261	div_100ns_to_usecs = DIV_100NS_TO_USECS;
	262	lib$ediv(&div_100ns_to_secs,&quad,&quo,&rem);
	263	quad1[0] = rem;
	264	quad1[1] = 0L;
	265	lib$ediv(&div_100ns_to_usecs,&quad1,&quo1,&rem1);
	266	tp->tv_sec = quo; /* Whole seconds */
	267	tp->tv_usec = quo1; /* Micro-seconds */
5cdb7193	268	#else
3785778e	269	quad -= base_adjust; /* convert to epoch offset */
dcf686c9	270	ans1=qdiv(quad,DIV_100NS_TO_SECS);
	271	ans2=qdiv(ans1.rem,DIV_100NS_TO_USECS);
	272	tp->tv_sec = ans1.quot; /* Whole seconds */
	273	tp->tv_usec = ans2.quot; /* Micro-seconds */
3785778e	274	#endif
dcf686c9	275	} else {
	276	tp->tv_sec = ret;
	277	return -1;
	278	}
9b6f56ad	279	# ifdef VMSISH_TIME
	280	# ifdef RTL_USES_UTC
	281	if (VMSISH_TIME) tp->tv_sec = _toloc(tp->tv_sec);
	282	# else
	283	if (!VMSISH_TIME) tp->tv_sec = _toutc(tp->tv_sec);
	284	# endif
	285	# endif
dcf686c9	286	return 0;
	287	}
	288	#endif
	289
	290	#if !defined(HAS_USLEEP) && defined(HAS_SELECT)
	291	#ifndef SELECT_IS_BROKEN
	292	#define HAS_USLEEP
	293	#define usleep hrt_usleep /* could conflict with ncurses for static build */
	294
	295	void
	296	hrt_usleep(unsigned long usec)
	297	{
	298	struct timeval tv;
	299	tv.tv_sec = 0;
	300	tv.tv_usec = usec;
	301	select(0, (Select_fd_set_t)NULL, (Select_fd_set_t)NULL,
	302	(Select_fd_set_t)NULL, &tv);
	303	}
	304	#endif
	305	#endif
	306
	307	#if !defined(HAS_USLEEP) && defined(WIN32)
	308	#define HAS_USLEEP
	309	#define usleep hrt_usleep /* could conflict with ncurses for static build */
	310
	311	void
	312	hrt_usleep(unsigned long usec)
	313	{
	314	long msec;
	315	msec = usec / 1000;
	316	Sleep (msec);
	317	}
	318	#endif
	319
	320
	321	#if !defined(HAS_UALARM) && defined(HAS_SETITIMER)
	322	#define HAS_UALARM
	323	#define ualarm hrt_ualarm /* could conflict with ncurses for static build */
	324
	325	int
	326	hrt_ualarm(int usec, int interval)
	327	{
	328	struct itimerval itv;
	329	itv.it_value.tv_sec = usec / 1000000;
	330	itv.it_value.tv_usec = usec % 1000000;
	331	itv.it_interval.tv_sec = interval / 1000000;
	332	itv.it_interval.tv_usec = interval % 1000000;
	333	return setitimer(ITIMER_REAL, &itv, 0);
	334	}
	335	#endif
	336
ca40fe49	337	#if !defined(HAS_UALARM) && defined(VMS)
	338	#define HAS_UALARM
	339	#define ualarm vms_ualarm
	340
	341	#include <lib$routines.h>
	342	#include <ssdef.h>
	343	#include <starlet.h>
	344	#include <descrip.h>
	345	#include <signal.h>
	346	#include <jpidef.h>
	347	#include <psldef.h>
	348
	349	#define VMSERR(s) (!((s)&1))
	350
	351	static void
	352	us_to_VMS(useconds_t mseconds, unsigned long v[])
	353	{
	354	int iss;
	355	unsigned long qq[2];
	356
	357	qq[0] = mseconds;
	358	qq[1] = 0;
	359	v[0] = v[1] = 0;
	360
	361	iss = lib$addx(qq,qq,qq);
	362	if (VMSERR(iss)) lib$signal(iss);
	363	iss = lib$subx(v,qq,v);
	364	if (VMSERR(iss)) lib$signal(iss);
	365	iss = lib$addx(qq,qq,qq);
	366	if (VMSERR(iss)) lib$signal(iss);
	367	iss = lib$subx(v,qq,v);
	368	if (VMSERR(iss)) lib$signal(iss);
	369	iss = lib$subx(v,qq,v);
	370	if (VMSERR(iss)) lib$signal(iss);
	371	}
	372
	373	static int
	374	VMS_to_us(unsigned long v[])
	375	{
	376	int iss;
	377	unsigned long div=10,quot, rem;
	378
	379	iss = lib$ediv(&div,v,&quot,&rem);
	380	if (VMSERR(iss)) lib$signal(iss);
	381
	382	return quot;
	383	}
	384
	385	typedef unsigned short word;
	386	typedef struct _ualarm {
	387	int function;
	388	int repeat;
	389	unsigned long delay[2];
	390	unsigned long interval[2];
	391	unsigned long remain[2];
	392	} Alarm;
	393
	394
	395	static int alarm_ef;
	396	static Alarm *a0, alarm_base;
	397	#define UAL_NULL 0
	398	#define UAL_SET 1
	399	#define UAL_CLEAR 2
	400	#define UAL_ACTIVE 4
401	static void ualarm_AST(Alarm *a);
402
403	static int
404	vms_ualarm(int mseconds, int interval)
405	{
406	Alarm *a, abase;
407	struct item_list3 {
408	word length;
409	word code;
410	void *bufaddr;
411	void *retlenaddr;
412	} ;
413	static struct item_list3 itmlst[2];
414	static int first = 1;
415	unsigned long asten;
416	int iss, enabled;
417
418	if (first) {
419	first = 0;
420	itmlst[0].code = JPI$_ASTEN;
421	itmlst[0].length = sizeof(asten);
422	itmlst[0].retlenaddr = NULL;
423	itmlst[1].code = 0;
424	itmlst[1].length = 0;
425	itmlst[1].bufaddr = NULL;
426	itmlst[1].retlenaddr = NULL;
427
428	iss = lib$get_ef(&alarm_ef);
429	if (VMSERR(iss)) lib$signal(iss);
430
431	a0 = &alarm_base;
432	a0->function = UAL_NULL;
433	}
434	itmlst[0].bufaddr = &asten;
435
436	iss = sys$getjpiw(0,0,0,itmlst,0,0,0);
437	if (VMSERR(iss)) lib$signal(iss);
438	if (!(asten&0x08)) return -1;
439
440	a = &abase;
441	if (mseconds) {
442	a->function = UAL_SET;
443	} else {
444	a->function = UAL_CLEAR;
445	}
446
447	us_to_VMS(mseconds, a->delay);
448	if (interval) {
449	us_to_VMS(interval, a->interval);
450	a->repeat = 1;
451	} else
452	a->repeat = 0;
453
454	iss = sys$clref(alarm_ef);
455	if (VMSERR(iss)) lib$signal(iss);
456
457	iss = sys$dclast(ualarm_AST,a,0);
458	if (VMSERR(iss)) lib$signal(iss);
459
460	iss = sys$waitfr(alarm_ef);
461	if (VMSERR(iss)) lib$signal(iss);
462
463	if (a->function == UAL_ACTIVE)
464	return VMS_to_us(a->remain);
465	else
466	return 0;
467	}
468
469
470
471	static void
472	ualarm_AST(Alarm *a)
473	{
474	int iss;
475	unsigned long now[2];
476
477	iss = sys$gettim(now);
478	if (VMSERR(iss)) lib$signal(iss);
479
480	if (a->function == UAL_SET \|\| a->function == UAL_CLEAR) {
481	if (a0->function == UAL_ACTIVE) {
482	iss = sys$cantim(a0,PSL$C_USER);
483	if (VMSERR(iss)) lib$signal(iss);
484
485	iss = lib$subx(a0->remain, now, a->remain);
486	if (VMSERR(iss)) lib$signal(iss);
487
488	if (a->remain[1] & 0x80000000)
489	a->remain[0] = a->remain[1] = 0;
490	}
491
492	if (a->function == UAL_SET) {
493	a->function = a0->function;
494	a0->function = UAL_ACTIVE;
495	a0->repeat = a->repeat;
496	if (a0->repeat) {
497	a0->interval[0] = a->interval[0];
498	a0->interval[1] = a->interval[1];
499	}
500	a0->delay[0] = a->delay[0];
501	a0->delay[1] = a->delay[1];
502
503	iss = lib$subx(now, a0->delay, a0->remain);
504	if (VMSERR(iss)) lib$signal(iss);
505
506	iss = sys$setimr(0,a0->delay,ualarm_AST,a0);
507	if (VMSERR(iss)) lib$signal(iss);
508	} else {
509	a->function = a0->function;
510	a0->function = UAL_NULL;
511	}
512	iss = sys$setef(alarm_ef);
513	if (VMSERR(iss)) lib$signal(iss);
514	} else if (a->function == UAL_ACTIVE) {
515	if (a->repeat) {
516	iss = lib$subx(now, a->interval, a->remain);
517	if (VMSERR(iss)) lib$signal(iss);
518
519	iss = sys$setimr(0,a->interval,ualarm_AST,a);
520	if (VMSERR(iss)) lib$signal(iss);
521	} else {
522	a->function = UAL_NULL;
523	}
524	iss = sys$wake(0,0);
525	if (VMSERR(iss)) lib$signal(iss);
526	lib$signal(SS$_ASTFLT);
527	} else {
528	lib$signal(SS$_BADPARAM);
529	}
530	}
531
532	#endif /* !HAS_UALARM && VMS */
533
534
535
dcf686c9	536	#ifdef HAS_GETTIMEOFDAY
dcf686c9	537
a2e20b18	538	static int
dcf686c9	539	myU2time(UV *ret)
	540	{
	541	struct timeval Tp;
	542	int status;
6e3b076d	543	status = gettimeofday (&Tp, NULL);
dcf686c9	544	ret[0] = Tp.tv_sec;
dcf686c9	545	ret[1] = Tp.tv_usec;
a2e20b18	546	return status;
dcf686c9	547	}
dcf686c9	548
3c72ec00	549	static NV
dcf686c9	550	myNVtime()
	551	{
	552	struct timeval Tp;
	553	int status;
6e3b076d	554	status = gettimeofday (&Tp, NULL);
a2e20b18	555	return status == 0 ? Tp.tv_sec + (Tp.tv_usec / 1000000.) : -1.0;
dcf686c9	556	}
	557
	558	#endif
	559
	560	MODULE = Time::HiRes PACKAGE = Time::HiRes
	561
	562	PROTOTYPES: ENABLE
	563
	564	BOOT:
dcf686c9	565	#ifdef HAS_GETTIMEOFDAY
a2e20b18	566	{
a2e20b18	567	UV auv[2];
cfb1f18c	568	hv_store(PL_modglobal, "Time::NVtime", 12, newSViv(PTR2IV(myNVtime)), 0);
a2e20b18	569	if (myU2time(auv) == 0)
	570	hv_store(PL_modglobal, "Time::U2time", 12, newSViv((IV) auv[0]), 0);
	571	}
dcf686c9	572	#endif
dcf686c9	573
3c72ec00	574	IV
	575	constant(name, arg)
	576	char * name
	577	int arg
	578
52d72fba	579	#if defined(HAS_USLEEP) && defined(HAS_GETTIMEOFDAY)
dcf686c9	580
92bc48ca	581	NV
dcf686c9	582	usleep(useconds)
92bc48ca	583	NV useconds
52d72fba	584	PREINIT:
	585	struct timeval Ta, Tb;
	586	CODE:
6e3b076d	587	gettimeofday(&Ta, NULL);
52d72fba	588	if (items > 0) {
92bc48ca	589	if (useconds > 1E6) {
92bc48ca	590	IV seconds = (IV) (useconds / 1E6);
f7916ddb	591	/* If usleep() has been implemented using setitimer()
	592	* then this contortion is unnecessary-- but usleep()
	593	* may be implemented in some other way, so let's contort. */
	594	if (seconds) {
	595	sleep(seconds);
	596	useconds -= 1E6 * seconds;
	597	}
	598	} else if (useconds < 0.0)
	599	croak("Time::HiRes::usleep(%"NVgf"): negative time not invented yet", useconds);
92bc48ca	600	usleep((UV)useconds);
52d72fba	601	} else
52d72fba	602	PerlProc_pause();
6e3b076d	603	gettimeofday(&Tb, NULL);
92bc48ca	604	#if 0
	605	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
	606	#endif
	607	RETVAL = 1E6*(Tb.tv_sec-Ta.tv_sec)+(NV)((IV)Tb.tv_usec-(IV)Ta.tv_usec);
dcf686c9	608
52d72fba	609	OUTPUT:
	610	RETVAL
	611
	612	NV
f9d00e57	613	sleep(...)
52d72fba	614	PREINIT:
52d72fba	615	struct timeval Ta, Tb;
dcf686c9	616	CODE:
6e3b076d	617	gettimeofday(&Ta, NULL);
92bc48ca	618	if (items > 0) {
92bc48ca	619	NV seconds = SvNV(ST(0));
f7916ddb	620	if (seconds >= 0.0) {
7c436af3	621	UV useconds = (UV)(1E6 * (seconds - (UV)seconds));
4880edd6	622	if (seconds >= 1.0)
4880edd6	623	sleep((UV)seconds);
f7916ddb	624	usleep(useconds);
	625	} else
	626	croak("Time::HiRes::sleep(%"NVgf"): negative time not invented yet", seconds);
92bc48ca	627	} else
f9d00e57	628	PerlProc_pause();
6e3b076d	629	gettimeofday(&Tb, NULL);
92bc48ca	630	#if 0
	631	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
	632	#endif
52d72fba	633	RETVAL = (NV)(Tb.tv_sec-Ta.tv_sec)+0.000001*(NV)(Tb.tv_usec-Ta.tv_usec);
	634
	635	OUTPUT:
	636	RETVAL
dcf686c9	637
	638	#endif
	639
	640	#ifdef HAS_UALARM
	641
3de7a4ec	642	int
dcf686c9	643	ualarm(useconds,interval=0)
	644	int useconds
	645	int interval
f7916ddb	646	CODE:
f7916ddb	647	if (useconds < 0 \|\| interval < 0)
3de7a4ec	648	croak("Time::HiRes::ualarm(%d, %d): negative time not invented yet", useconds, interval);
f7916ddb	649	RETVAL = ualarm(useconds, interval);
dcf686c9	650
f7916ddb	651	OUTPUT:
	652	RETVAL
	653
	654	NV
	655	alarm(seconds,interval=0)
	656	NV seconds
	657	NV interval
dcf686c9	658	CODE:
f7916ddb	659	if (seconds < 0.0 \|\| interval < 0.0)
	660	croak("Time::HiRes::alarm(%"NVgf", %"NVgf"): negative time not invented yet", seconds, interval);
	661	RETVAL = (NV)ualarm(seconds * 1000000,
	662	interval * 1000000) / 1E6;
dcf686c9	663
c6c619a9	664	OUTPUT:
	665	RETVAL
	666
dcf686c9	667	#endif
	668
	669	#ifdef HAS_GETTIMEOFDAY
db835671	670	# ifdef MACOS_TRADITIONAL /* fix epoch TZ and use unsigned time_t */
	671	void
	672	gettimeofday()
	673	PREINIT:
	674	struct timeval Tp;
	675	struct timezone Tz;
	676	PPCODE:
	677	int status;
6e3b076d	678	status = gettimeofday (&Tp, &Tz);
db835671	679	Tp.tv_sec += Tz.tz_minuteswest * 60; /* adjust for TZ */
	680
	681	if (GIMME == G_ARRAY) {
	682	EXTEND(sp, 2);
	683	/* Mac OS (Classic) has unsigned time_t */
	684	PUSHs(sv_2mortal(newSVuv(Tp.tv_sec)));
	685	PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
	686	} else {
	687	EXTEND(sp, 1);
	688	PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
	689	}
	690
	691	NV
	692	time()
	693	PREINIT:
	694	struct timeval Tp;
	695	struct timezone Tz;
	696	CODE:
	697	int status;
6e3b076d	698	status = gettimeofday (&Tp, &Tz);
db835671	699	Tp.tv_sec += Tz.tz_minuteswest * 60; /* adjust for TZ */
	700	RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.0);
	701	OUTPUT:
	702	RETVAL
dcf686c9	703
db835671	704	# else /* MACOS_TRADITIONAL */
dcf686c9	705	void
	706	gettimeofday()
	707	PREINIT:
	708	struct timeval Tp;
	709	PPCODE:
	710	int status;
6e3b076d	711	status = gettimeofday (&Tp, NULL);
dcf686c9	712	if (GIMME == G_ARRAY) {
	713	EXTEND(sp, 2);
	714	PUSHs(sv_2mortal(newSViv(Tp.tv_sec)));
	715	PUSHs(sv_2mortal(newSViv(Tp.tv_usec)));
	716	} else {
	717	EXTEND(sp, 1);
	718	PUSHs(sv_2mortal(newSVnv(Tp.tv_sec + (Tp.tv_usec / 1000000.0))));
	719	}
	720
3c72ec00	721	NV
dcf686c9	722	time()
	723	PREINIT:
	724	struct timeval Tp;
	725	CODE:
	726	int status;
6e3b076d	727	status = gettimeofday (&Tp, NULL);
dcf686c9	728	RETVAL = Tp.tv_sec + (Tp.tv_usec / 1000000.);
	729	OUTPUT:
	730	RETVAL
	731
db835671	732	# endif /* MACOS_TRADITIONAL */
dcf686c9	733	#endif
dcf686c9	734
3c72ec00	735	#if defined(HAS_GETITIMER) && defined(HAS_SETITIMER)
	736
	737	#define TV2NV(tv) ((NV)((tv).tv_sec) + 0.000001 * (NV)((tv).tv_usec))
	738
	739	void
	740	setitimer(which, seconds, interval = 0)
	741	int which
	742	NV seconds
	743	NV interval
	744	PREINIT:
	745	struct itimerval newit;
	746	struct itimerval oldit;
	747	PPCODE:
f7916ddb	748	if (seconds < 0.0 \|\| interval < 0.0)
f7916ddb	749	croak("Time::HiRes::setitimer(%"IVdf", %"NVgf", %"NVgf"): negative time not invented yet", which, seconds, interval);
3c72ec00	750	newit.it_value.tv_sec = seconds;
	751	newit.it_value.tv_usec =
	752	(seconds - (NV)newit.it_value.tv_sec) * 1000000.0;
	753	newit.it_interval.tv_sec = interval;
	754	newit.it_interval.tv_usec =
	755	(interval - (NV)newit.it_interval.tv_sec) * 1000000.0;
	756	if (setitimer(which, &newit, &oldit) == 0) {
	757	EXTEND(sp, 1);
	758	PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_value))));
	759	if (GIMME == G_ARRAY) {
	760	EXTEND(sp, 1);
	761	PUSHs(sv_2mortal(newSVnv(TV2NV(oldit.it_interval))));
	762	}
	763	}
	764
	765	void
	766	getitimer(which)
	767	int which
	768	PREINIT:
	769	struct itimerval nowit;
	770	PPCODE:
	771	if (getitimer(which, &nowit) == 0) {
	772	EXTEND(sp, 1);
	773	PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_value))));
	774	if (GIMME == G_ARRAY) {
	775	EXTEND(sp, 1);
	776	PUSHs(sv_2mortal(newSVnv(TV2NV(nowit.it_interval))));
	777	}
	778	}
	779
	780	#endif
	781
dcf686c9	782	# $Id: HiRes.xs,v 1.11 1999/03/16 02:27:38 wegscd Exp wegscd $
	783
	784	# $Log: HiRes.xs,v $
	785	# Revision 1.11 1999/03/16 02:27:38 wegscd
	786	# Add U2time, NVtime. Fix symbols for static link.
	787	#
	788	# Revision 1.10 1998/09/30 02:36:25 wegscd
	789	# Add VMS changes.
	790	#
	791	# Revision 1.9 1998/07/07 02:42:06 wegscd
	792	# Win32 usleep()
	793	#
	794	# Revision 1.8 1998/07/02 01:47:26 wegscd
	795	# Add Win32 code for gettimeofday.
	796	#
	797	# Revision 1.7 1997/11/13 02:08:12 wegscd
	798	# Add missing EXTEND in gettimeofday() scalar code.
	799	#
	800	# Revision 1.6 1997/11/11 02:32:35 wegscd
	801	# Do something useful when calling gettimeofday() in a scalar context.
	802	# The patch is courtesy of Gisle Aas.
	803	#
	804	# Revision 1.5 1997/11/06 03:10:47 wegscd
	805	# Fake ualarm() if we have setitimer.
	806	#
	807	# Revision 1.4 1997/11/05 05:41:23 wegscd
	808	# Turn prototypes ON (suggested by Gisle Aas)
	809	#
	810	# Revision 1.3 1997/10/13 20:56:15 wegscd
	811	# Add PROTOTYPES: DISABLE
	812	#
	813	# Revision 1.2 1997/05/23 01:01:38 wegscd
	814	# Conditional compilation, depending on what the OS gives us.
	815	#
	816	# Revision 1.1 1996/09/03 18:26:35 wegscd
	817	# Initial revision
	818	#
	819	#