summaryrefslogtreecommitdiffstats
path: root/time.c
diff options
context:
space:
mode:
authorBryan Newbold <bnewbold@robocracy.org>2017-02-20 00:05:25 -0800
committerBryan Newbold <bnewbold@robocracy.org>2017-02-20 00:05:25 -0800
commitdb04688faa20f3576257c0fe41752ec435beab9a (patch)
tree6d638c2e1f65afd5f49d20b2d22ce35bd74705ff /time.c
parent1edcb9b62a1a520eddae8403c19d841c9b18737f (diff)
downloadscm-db04688faa20f3576257c0fe41752ec435beab9a.tar.gz
scm-db04688faa20f3576257c0fe41752ec435beab9a.zip
Import Upstream version 5c3upstream/5c3
Diffstat (limited to 'time.c')
-rw-r--r--time.c329
1 files changed, 159 insertions, 170 deletions
diff --git a/time.c b/time.c
index 4b4368c..4d0d723 100644
--- a/time.c
+++ b/time.c
@@ -44,177 +44,146 @@
#include "scm.h"
-#ifdef HAVE_CONFIG_H
-
-# ifndef HAVE_FTIME
-# define LACK_FTIME
+#ifdef STDC_HEADERS
+# include <time.h>
+# ifdef M_SYSV
+# include <sys/types.h>
+# include <sys/times.h>
# endif
-# ifndef HAVE_TIMES
-# define LACK_TIMES
+# ifdef sun
+# include <sys/types.h>
+# include <sys/times.h>
# endif
-# ifdef HAVE_SYS_TYPES_H
+# ifdef ultrix
# include <sys/types.h>
+# include <sys/times.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
+# ifdef nosve
+# include <sys/types.h>
+# include <sys/times.h>
# endif
-# ifdef HAVE_SYS_TIMES_H
+# ifdef _UNICOS
+# include <sys/types.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
-# else
-# ifdef __amigados__
-# include <sys/timeb.h>
-# endif
-# endif
+# ifdef __IBMC__
+# include <sys/timeb.h>
# endif
-
#else
-
-# ifdef STDC_HEADERS
+# ifdef SVR2
# 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>
+# 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 has gettimeofday()
+ (LACK_FTIME should not be defined). */
+/* #define USE_GETTIMEOFDAY */
/* 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
+#ifdef linux
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/timeb.h>
+# define USE_GETTIMEOFDAY
+#endif
+#ifdef freebsd
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/timeb.h>
+# define USE_GETTIMEOFDAY
+#endif
+#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 macintosh
+# 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
-# ifdef MSDOS
+#endif
+#ifdef _UNICOS
+# define LACK_FTIME
+#endif
+
+#ifndef LACK_FTIME
+# ifdef unix
# 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
+#endif
-# ifdef MWC
-# include <time.h>
-# include <sys/timeb.h>
-# endif
+#ifdef __EMX__
+# define LACK_TIMES
+# include <sys/types.h>
+# include <sys/timeb.h>
+#endif
-# ifdef ARM_ULIB
-# include <sys/types.h>
-# include <time.h>
-# endif
+#ifdef MWC
+# include <time.h>
+# include <sys/timeb.h>
+#endif
-#endif /* HAVE_CONFIG_H */
+#ifdef ARM_ULIB
+# include <sys/types.h>
+# include <time.h>
+#endif
#ifdef vms
# define LACK_TIMES
@@ -327,18 +296,48 @@ SCM your_time()
}
# endif /* AMIGA */
#else /* LACK_FTIME */
+# ifdef USE_GETTIMEOFDAY
+int scm_ftime(time_buffer)
+ struct timeb *time_buffer;
+{
+ struct timezone t_z; struct timeval t_v;
+ if (gettimeofday(&t_v, &t_z) < 0) return -1;
+ time_buffer->timezone = t_z.tz_minuteswest;
+ time_buffer->dstflag = t_z.tz_dsttime;
+ time_buffer->millitm = t_v.tv_usec / 1000;
+ time_buffer->time = t_v.tv_sec;
+ return 0;}
+# else /* USE_GETTIMEOFDAY */
+# define scm_ftime ftime
+# endif /* USE_GETTIMEOFDAY */
struct timeb your_base = {0};
+# define TIMETRIES 10
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);
+ long tmp;
+ struct timeb time_buffer1;
+ struct timeb time_buffer2;
+ int cnt = 0;
+ tryagain:
+ cnt++;
+ scm_ftime(&time_buffer1);
+ scm_ftime(&time_buffer2);
+ if (time_buffer1.time==time_buffer2.time) {
+ if (time_buffer1.millitm > time_buffer2.millitm)
+ time_buffer2.time = time_buffer2.time + 1;
+ }
+ else if ((1 + time_buffer1.time)==time_buffer2.time) ;
+ else if (cnt < TIMETRIES) goto tryagain;
+ else {
+ warn("could not read two ftime()s within one second in 10 tries",0L);
+ return MAKINUM(-1);
+ }
+ time_buffer2.time -= your_base.time;
+ tmp = time_buffer2.millitm - your_base.millitm;
+ tmp = time_buffer2.time*1000L + tmp;
+ tmp *= CLKTCK;
+ tmp /= 1000;
+ return MAKINUM(tmp);
}
#endif /* LACK_FTIME */
@@ -377,32 +376,22 @@ static iproc subr0s[] = {
{"current-time", curtime},
{0, 0}};
-void init_time()
+void reset_time()
{
- sysintern("internal-time-units-per-second",
- MAKINUM((long)CLKTCK));
#ifdef LACK_FTIME
# ifndef AMIGA
- if (!your_base) time(&your_base);
+ time(&your_base);
# endif
#else
- if (!your_base.time) ftime(&your_base);
+ scm_ftime(&your_base);
#endif
- if (!my_base) my_base = mytime();
- init_iprocs(subr0s, tc7_subr_0);
+ my_base = 0;
+ my_base = mytime();
}
-#ifdef freebsd
-# include <sys/types.h>
-# include <sys/time.h>
-# include <sys/timeb.h>
-int ftime(time_buffer)
- struct timeb *time_buffer;
+void init_time()
{
- struct timezone t_z; struct timeval t_v;
- if (gettimeofday(&t_v, &t_z) < 0) return -1;
- time_buffer->timezone = t_z.tz_minuteswest;
- time_buffer->dstflag = t_z.tz_dsttime;
- time_buffer->millitm = t_v.tv_usec / 1000;
- time_buffer->time = t_v.tv_sec;
- return 0;}
-#endif
+ sysintern("internal-time-units-per-second",
+ MAKINUM((long)CLKTCK));
+ reset_time();
+ init_iprocs(subr0s, tc7_subr_0);
+}