Import Upstream version 4e6upstream/4e6

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+/* Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE.  If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way.  To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.  
+ */
+
+/* "time.c" functions dealing with time.
+   Author: Aubrey Jaffer */
+
+#include "scm.h"
+
+#ifdef HAVE_CONFIG_H
+
+# ifndef HAVE_FTIME
+#  define LACK_FTIME
+# endif
+# ifndef HAVE_TIMES
+#  define LACK_TIMES
+# endif
+# ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+# endif
+# ifdef TIME_WITH_SYS_TIME
+#  include <sys/time.h>
+#  include <time.h>
+# else
+#  ifdef HAVE_SYS_TIME_H
+#   include <sys/time.h>
+#  else
+#   ifdef HAVE_TIME_H
+#    include <time.h>
+#   endif
+#  endif
+# endif
+# ifdef HAVE_SYS_TIMES_H
+#  include <sys/times.h>
+# else
+#  ifdef HAVE_SYS_TIMEB_H
+#   include <sys/timeb.h>
+#  endif
+# endif
+# ifdef HAVE_FTIME
+#  ifdef unix
+#   ifndef GO32
+#    include <sys/timeb.h>
+#   endif
+#  endif
+# endif
+
+#else
+
+# ifdef STDC_HEADERS
+#  include <time.h>
+#  ifdef M_SYSV
+#   include <sys/types.h>
+#   include <sys/times.h>
+#  endif
+#  ifdef sun
+#   include <sys/types.h>
+#   include <sys/times.h>
+#  endif
+#  ifdef ultrix
+#   include <sys/types.h>
+#   include <sys/times.h>
+#  endif
+#  ifdef nosve
+#   include <sys/types.h>
+#   include <sys/times.h>
+#  endif
+#  ifdef _UNICOS
+#   include <sys/types.h>
+#   include <sys/times.h>
+#  endif
+#  ifdef __IBMC__
+#   include <sys/timeb.h>
+#  endif
+# else
+#  ifdef SVR2
+#   include <time.h>
+#  else
+#   ifndef ARM_ULIB
+#    include <sys/time.h>
+#   else
+#    include <time.h>
+#   endif
+#  endif
+#  include <sys/types.h>
+
+#  ifndef ARM_ULIB
+#   include <sys/times.h>
+#  else
+#   include <time.h>
+#  endif
+
+# endif
+
+/* Define this if your system lacks ftime(). */
+/* #define LACK_FTIME */
+/* Define this if your system lacks times(). */
+/* #define LACK_TIMES */
+
+# ifdef __TURBOC__
+#  define LACK_TIMES
+# endif
+# if (__TURBOC__==1) /* Needed for TURBOC V1.0 */
+#  define LACK_FTIME
+#  undef MSDOS
+# endif
+# ifdef __HIGHC__
+#  define LACK_TIMES
+# endif
+# ifdef THINK_C
+#  define LACK_FTIME
+#  define LACK_TIMES
+#  define CLK_TCK 60
+# endif
+# ifdef SVR2
+#  define LACK_FTIME
+# endif
+# ifdef SVR4
+#  define LACK_FTIME
+# endif
+# ifdef __svr4__
+#  define LACK_FTIME
+# endif
+# ifdef nosve
+#  define LACK_FTIME
+# endif
+# ifdef GO32
+#  define LACK_FTIME
+#  define LACK_TIMES
+# endif
+# ifdef atarist
+#  define LACK_FTIME
+#  define LACK_TIMES
+# endif
+# ifdef ARM_ULIB
+#  define LACK_FTIME
+#  define LACK_TIMES
+# endif
+# ifdef _DCC
+#  define LACK_FTIME
+# endif
+# ifdef MSDOS
+#  ifndef GO32
+#   include <sys/types.h>
+#   include <sys/timeb.h>
+#  endif
+# endif
+# ifdef _UNICOS
+#  define LACK_FTIME
+# endif
+
+# ifndef LACK_FTIME
+#  ifdef unix
+#   ifndef GO32
+#    include <sys/timeb.h>
+#   endif
+#  endif
+# endif
+
+# ifdef __EMX__
+#  define LACK_TIMES
+#  include <sys/types.h>
+#  include <sys/timeb.h>
+# endif
+
+# ifdef MWC
+#  include <time.h>
+#  include <sys/timeb.h>
+# endif
+
+# ifdef ARM_ULIB
+#  include <sys/types.h>
+#  include <time.h>
+# endif
+
+#endif /* HAVE_CONFIG_H */
+
+#ifdef vms
+# define LACK_TIMES
+# define LACK_FTIME
+#endif
+
+#ifdef CLK_TCK
+# define CLKTCK CLK_TCK
+# ifdef CLOCKS_PER_SEC
+#  ifdef unix
+#   ifndef ARM_ULIB
+#    include <sys/times.h>
+#   endif
+#   define LACK_CLOCK
+    /* This is because clock() might be POSIX rather than ANSI.
+       This occurs on HP-UX machines */
+#  endif
+# endif
+#else
+# ifdef CLOCKS_PER_SEC
+#  define CLKTCK CLOCKS_PER_SEC
+# else
+#  define LACK_CLOCK
+#  ifdef AMIGA
+#   include <stddef.h>
+#   define LACK_TIMES
+#   define LACK_FTIME
+#   define CLKTCK 1000
+#  else
+#   define CLKTCK 60
+#  endif
+# endif
+#endif
+
+#ifdef __STDC__
+# define timet time_t
+#else
+# define timet long
+#endif
+
+#ifdef LACK_TIMES
+# ifdef LACK_CLOCK
+#  ifdef AMIGA
+/* From: "Fred Bayer" <bayerf@lan.informatik.tu-muenchen.de> */
+#   ifdef AZTEC_C		/* AZTEC_C */
+#    include <devices/timer.h>
+static long mytime()
+{
+	long sec, mic, mili = 0;
+	struct timerequest *timermsg;
+	struct MsgPort *timerport;
+	if(!(timerport = (struct MsgPort *)CreatePort(0, 0))){
+	lputs("No mem for port.\n", cur_errp);
+		return mili;
+	}
+	if(!(timermsg = (struct timerequest *)
+		 CreateExtIO(timerport, sizeof(struct timerequest)))){
+		lputs("No mem for timerequest.\n", cur_errp);
+		DeletePort(timermsg->tr_node.io_Message.mn_ReplyPort);
+	return mili;
+	}
+	if(!(OpenDevice(TIMERNAME, UNIT_MICROHZ, timermsg, 0))){
+		timermsg->tr_node.io_Command = TR_GETSYSTIME;
+		timermsg->tr_node.io_Flags = 0;
+		DoIO(timermsg);
+		sec = timermsg->tr_time.tv_secs;
+		mic = timermsg->tr_time.tv_micro;
+		mili = sec*1000+mic/1000;
+		CloseDevice(timermsg);
+	}
+	else lputs("No Timer available.\n", cur_errp);
+	DeletePort(timermsg->tr_node.io_Message.mn_ReplyPort);
+	DeleteExtIO(timermsg);
+	return mili ;
+}
+#   else			/* this is for SAS/C */
+static long mytime()
+{
+   unsigned int cl[2];
+   timer(cl);
+   return(cl[0]*1000+cl[1]/1000);
+}
+#   endif /* AZTEC_C */
+#  else /* AMIGA */
+#   define mytime() ((time((timet*)0) - your_base) * CLKTCK)
+#  endif /* AMIGA */
+# else /* LACK_CLOCK */
+#  define mytime clock
+# endif /* LACK_CLOCK */
+#else /* LACK_TIMES */
+static long mytime()
+{
+  struct tms time_buffer;
+  times(&time_buffer);
+  return time_buffer.tms_utime + time_buffer.tms_stime;
+}
+#endif /* LACK_TIMES */
+
+#ifdef LACK_FTIME
+# ifdef AMIGA
+SCM your_time()
+{
+  return MAKINUM(mytime());
+}
+# else
+timet your_base = 0;
+SCM your_time()
+{
+	return MAKINUM((time((timet*)0) - your_base) * (int)CLKTCK);
+}
+# endif /* AMIGA */
+#else /* LACK_FTIME */
+struct timeb your_base = {0};
+SCM your_time()
+{
+	struct timeb time_buffer;
+	long tmp;
+	ftime(&time_buffer);
+	time_buffer.time -= your_base.time;
+	tmp = time_buffer.millitm - your_base.millitm;
+	tmp = time_buffer.time*1000L + tmp;
+	tmp *= CLKTCK;
+	tmp /= 1000;
+	return MAKINUM(tmp);
+}
+#endif /* LACK_FTIME */
+
+long my_base = 0;
+SCM my_time()
+{
+  return MAKINUM(mytime()-my_base);
+}
+
+SCM curtime()
+{
+  timet timv = time((timet*)0);
+  SCM ans;
+#ifndef _DCC
+# ifdef STDC_HEADERS
+#  if (__TURBOC__ > 0x201)
+  timv = mktime(gmtime(&timv));
+#  endif
+# endif
+#endif
+  ans = ulong2num(timv);
+  return BOOL_F==ans ? MAKINUM(timv) : ans;
+}
+
+long time_in_msec(x)
+     long x;
+{
+  if (CLKTCK==60) return (x*50)/3;
+  else
+    return (CLKTCK < 1000 ? x*(1000L/(long)CLKTCK) : (x*1000L)/(long)CLKTCK);
+}
+
+static iproc subr0s[] = {
+	{"get-internal-run-time", my_time},
+	{"get-internal-real-time", your_time},
+	{"current-time", curtime},
+	{0, 0}};
+
+void init_time()
+{
+	sysintern("internal-time-units-per-second",
+		  MAKINUM((long)CLKTCK));
+#ifdef LACK_FTIME
+# ifndef AMIGA
+	if (!your_base) time(&your_base);
+# endif
+#else
+	if (!your_base.time) ftime(&your_base);
+#endif
+	if (!my_base) my_base = mytime();
+	init_iprocs(subr0s, tc7_subr_0);
+}