/* systime.h - System-dependent definitions for time manipulations.
- Copyright (C) 1992 Free Software Foundation, Inc.
+ Copyright (C) 1993-1994, 2002-2012 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs 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 1, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
-#if defined (HAVE_TIMEVAL) && !defined (NEED_TIME_H)
-/* NEED_TIME_H is necessary because some versions of HP/UX shouldn't
- have this included; time.h should do the trick instead. */
+#ifndef EMACS_SYSTIME_H
+#define EMACS_SYSTIME_H
+#ifdef TIME_WITH_SYS_TIME
+#include <sys/time.h>
+#include <time.h>
+#else
+#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
-
#else
-
-/* _h_BSDTYPES is checked because on ISC unix, socket.h includes
- both time.h and sys/time.h, and the later file is protected
- from repeated inclusion. We just hope that other systems will
- use this guard either not at all, or similarly. */
-#ifndef _h_BSDTYPES
#include <time.h>
-#endif /* _h_BSDTYPES */
-
#endif
-
-/* AIX needs both <sys/time.h> and <time.h>. */
-#ifdef _AIX
-#include <time.h>
#endif
-/* SVr4 doesn't actually declare this in its #include files. */
-#ifdef USG5_4
-extern long timezone;
+#ifdef emacs
+# ifdef HAVE_X_WINDOWS
+# include <X11/X.h>
+# else
+typedef unsigned long Time;
+# endif
#endif
-#ifdef VMS
-#ifdef VAXC
-#include "vmstime.h"
+/* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
+ disagree about the name of the guard symbol. */
+#ifdef HPUX
+#ifdef _STRUCT_TIMEVAL
+#ifndef __TIMEVAL__
+#define __TIMEVAL__
+#endif
#endif
#endif
-
\f
/* EMACS_TIME is the type to use to represent temporal intervals -
struct timeval on some systems, int on others. It can be passed as
- the timeout argument to the select () system call.
+ the timeout argument to the select system call.
EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
- EMACS_HAS_USECS is defined iff EMACS_TIME has a usecs component.
- EMACS_USECS (TIME) is an rvalue for the milliseconds component of TIME.
- This returns zero if EMACS_TIME doesn't have a milliseconds component.
- EMACS_SET_USECS (TIME, MILLISECONDS) sets that to MILLISECONDS.
- This does nothing if EMACS_TIME doesn't have a milliseconds component.
+ EMACS_HAS_USECS is defined if EMACS_TIME has a usecs component.
+ EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
+ This returns zero if EMACS_TIME doesn't have a microseconds component.
+ EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
+ This does nothing if EMACS_TIME doesn't have a microseconds component.
EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
EMACS_GET_TIME (TIME) stores the current system time in TIME, which
should be an lvalue.
- EMACS_SET_UTIMES (PATH, ATIME, MTIME) changes the last-access and
- last-modification times of the file named PATH to ATIME and
- MTIME, which are EMACS_TIMEs.
EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
result in DEST. SRC should not be negative.
EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
- stores the result in DEST. SRC should not be negative.
- EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
+ stores the result in DEST. SRC should not be negative.
+ EMACS_TIME_NEG_P (TIME) is true if TIME is negative.
*/
#define EMACS_SECS(time) ((time).tv_sec + 0)
#define EMACS_USECS(time) ((time).tv_usec + 0)
#define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
-#define EMACS_SET_USECS(time, milliseconds) ((time).tv_usec = (milliseconds))
-
-#define EMACS_GET_TIME(time) \
-{ \
- struct timezone dummy; \
- gettimeofday (&(time), &dummy); \
-}
-
-#define EMACS_ADD_TIME(dest, src1, src2) \
-{ \
- (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \
- (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \
- if ((dest).tv_usec > 1000000) \
- (dest).tv_usec -= 1000000, (dest).tv_sec++; \
-}
-
-#define EMACS_SUB_TIME(dest, src1, src2) \
-{ \
- (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \
- (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \
- if ((dest).tv_usec < 0) \
- (dest).tv_usec += 1000000, (dest).tv_sec--; \
-}
+#define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds))
+
+/* On SVR4, the compiler may complain if given this extra BSD arg. */
+#ifdef GETTIMEOFDAY_ONE_ARGUMENT
+#define EMACS_GET_TIME(time) gettimeofday (&(time))
+#else /* not GETTIMEOFDAY_ONE_ARGUMENT */
+/* Presumably the second arg is ignored. */
+#define EMACS_GET_TIME(time) gettimeofday (&(time), NULL)
+#endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
+
+#define EMACS_ADD_TIME(dest, src1, src2) \
+ do { \
+ (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \
+ (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \
+ if ((dest).tv_usec > 1000000) \
+ (dest).tv_usec -= 1000000, (dest).tv_sec++; \
+ } while (0)
+
+#define EMACS_SUB_TIME(dest, src1, src2) \
+ do { \
+ (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \
+ (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \
+ if ((dest).tv_usec < 0) \
+ (dest).tv_usec += 1000000, (dest).tv_sec--; \
+ } while (0)
#define EMACS_TIME_NEG_P(time) \
- ((time).tv_sec < 0 \
+ ((long)(time).tv_sec < 0 \
|| ((time).tv_sec == 0 \
- && (time).tv_usec < 0))
+ && (long)(time).tv_usec < 0))
#else /* ! defined (HAVE_TIMEVAL) */
#define EMACS_SET_SECS_USECS(time, secs, usecs) \
(EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
-#ifdef USE_UTIME
-
-#define EMACS_SET_UTIMES(path, atime, mtime) \
- { \
- time_t tv[2]; \
- tv[0] = EMACS_SECS (atime); \
- tv[1] = EMACS_SECS (mtime); \
- utime ((path), tv); \
- }
-
-#else /* ! defined (USE_UTIME) */
-
-#define EMACS_SET_UTIMES(path, atime, mtime) \
- { \
- EMACS_TIME tv[2]; \
- tv[0] = atime; \
- tv[1] = mtime; \
- utimes ((path), tv); \
- }
-
-#endif /* ! defined (USE_UTIME) */
+extern int set_file_times (const char *, EMACS_TIME, EMACS_TIME);
-\f
-
-/* EMACS_CURRENT_TIME_ZONE (int *OFFSET, int *SAVINGS_FLAG,
- char *STANDARD_ABBR, char *SAVINGS_ABBR);
- expands to a statement which stores information about the current
- time zone in its arguments.
-
- *OFFSET is set to the number of minutes EAST of Greenwich at which
- the site's time zone is located. This should describe the offset
- to standard time only; if some sort of daylight savings time is in
- effect, that should not affect this value. Note that the tm_gmtoff
- member of the struct tm returned by localtime is adjusted for
- daylight savings, so you don't want to use localtime to set
- *OFFSET; gettimeofday does the right thing.
-
- *SAVINGS_FLAG is set to 1 if some sort of daylight savings time is
- currently in effect, or 0 if no seasonal adjustment is currently
- active.
-
- *STANDARD_ABBR points to an array of at least 10 characters, which
- should be set to the standard abbreviation for the time zone name
- when daylight savings time is not active. For example, EDT would
- be appropriate for the Eastern time zone of the USA.
-
- *SAVINGS_ABBR points to an array of at least 10 characters, which
- should be set to the standard abbreviation for the time zone name
- when daylight savings time is active. For example, EST would be
- appropriate for the Eastern time zone of the USA.
-
- If the operating system cannot provide all this information, then
- this macro will not be defined. */
-
-
-/* The operating system configuration file can define
- EMACS_CURRENT_TIME_ZONE. If not, we'll take a shot at it here. */
+/* defined in keyboard.c */
+extern void set_waiting_for_input (EMACS_TIME *);
-#ifndef EMACS_CURRENT_TIME_ZONE
-
-/* System V derivatives have a timezone global variable. */
-#if defined(USG) || defined(VMS)
-#define EMACS_GET_TZ_OFFSET(offset) \
- do { \
- tzset (); \
- *(offset) = timezone; \
- } while (0)
+/* When lisp.h is not included Lisp_Object is not defined (this can
+ happen when this files is used outside the src directory).
+ Use GCPRO1 to determine if lisp.h was included. */
+#ifdef GCPRO1
+/* defined in editfns.c*/
+extern Lisp_Object make_time (time_t);
+extern int lisp_time_argument (Lisp_Object, time_t *, int *);
#endif
-/* If we have timeval, then we have gettimeofday; that's half the battle. */
-#if defined (HAVE_TIMEVAL) && !defined (EMACS_GET_TZ_OFFSET)
-#define EMACS_GET_TZ_OFFSET(offset) \
- do { \
- struct timeval dummy; \
- struct timezone zoneinfo; \
- \
- gettimeofday (&dummy, &zoneinfo); \
- *(offset) = -zoneinfo.tz_minuteswest; \
- } while (0)
-#endif /* ! defined (HAVE_TIMEVAL) */
-
-/* The following sane systems have a tzname array. The timezone() function
- is a stupid idea; timezone names can only be determined geographically,
- not by Greenwich offset. */
-#if defined (ultrix) || defined (hpux) || defined (_AIX) || defined (USG) || defined(VMS)
+/* Compare times T1 and T2. Value is 0 if T1 and T2 are the same.
+ Value is < 0 if T1 is less than T2. Value is > 0 otherwise. (Cast
+ to long is for those platforms where time_t is an unsigned
+ type, and where otherwise T1 will always be grater than T2.) */
-#define EMACS_GET_TZ_NAMES(standard, savings) \
- do { \
- extern char *tzname[2]; \
- strcpy ((standard), tzname[0]); \
- strcpy ((savings), tzname[1]); \
- } while (0)
+#define EMACS_TIME_CMP(T1, T2) \
+ ((long)EMACS_SECS (T1) - (long)EMACS_SECS (T2) \
+ + (EMACS_SECS (T1) == EMACS_SECS (T2) \
+ ? EMACS_USECS (T1) - EMACS_USECS (T2) \
+ : 0))
-#else /* ! defined (ultrix) || defined (hpux) || defined (_AIX) */
-/* If we are running SunOS, Mt. Xinu BSD, or MACH 2.5, these systems have a
- timezone() function. */
-#if (defined (hp9000) && ! defined (hpux) && defined (unix)) || defined (MACH) || defined (sun)
-
-#define EMACS_GET_TZ_NAMES(standard, savings) \
- do { \
- struct timeval dummy; \
- struct timezone zoneinfo; \
- extern char *timezone (); \
- \
- gettimeofday (&dummy, &zoneinfo); \
- strcpy ((standard), timezone (zoneinfo.tz_minuteswest, 0)); \
- strcpy ((savings), timezone (zoneinfo.tz_minuteswest, 1)); \
- } while (0)
+/* Compare times T1 and T2 for equality, inequality etc. */
-#endif /* ! (defined (hp9000) && ! defined (hpux) && defined (unix)) || defined (MACH) || defined (sun) */
-#endif /* ! defined (ultrix) || defined (hpux) || defined (_AIX) */
-
-/* If we can get all the information we need, let's define the macro! */
-#if defined (EMACS_GET_TZ_OFFSET) && defined (EMACS_GET_TZ_NAMES)
-
-#define EMACS_CURRENT_TIME_ZONE(offset, savings_flag, standard, savings)\
- do { \
- EMACS_TIME t; \
- long secs; \
- struct tm *tmp; \
- \
- EMACS_GET_TIME (t); \
- secs = EMACS_SECS (t); \
- tmp = localtime (&secs); \
- *(savings_flag) = tmp->tm_isdst; \
- \
- EMACS_GET_TZ_OFFSET (offset); \
- EMACS_GET_TZ_NAMES (standard, savings); \
- } while (0)
-#endif /* ! defined (EMACS_GET_TZ_OFFSET) && defined (EMACS_GET_TZ_NAMES) */
+#define EMACS_TIME_EQ(T1, T2) (EMACS_TIME_CMP (T1, T2) == 0)
+#define EMACS_TIME_NE(T1, T2) (EMACS_TIME_CMP (T1, T2) != 0)
+#define EMACS_TIME_GT(T1, T2) (EMACS_TIME_CMP (T1, T2) > 0)
+#define EMACS_TIME_GE(T1, T2) (EMACS_TIME_CMP (T1, T2) >= 0)
+#define EMACS_TIME_LT(T1, T2) (EMACS_TIME_CMP (T1, T2) < 0)
+#define EMACS_TIME_LE(T1, T2) (EMACS_TIME_CMP (T1, T2) <= 0)
-#endif /* EMACS_CURRENT_TIME_ZONE */
+#endif /* EMACS_SYSTIME_H */