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- /* systime.h - System-dependent definitions for time manipulations.
- Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
-
- This file is part of XEmacs.
-
- XEmacs 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.
-
- XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
- Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Synched up with: FSF 19.28. */
-
- #ifndef _XEMACS_SYSTIME_H_
- #define _XEMACS_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
- #include <time.h>
- #endif
- #endif
-
- #ifdef HAVE_UTIME_H
- # include <utime.h>
- #endif
-
- #ifdef HAVE_TZNAME
- #ifndef tzname /* For SGI. */
- extern char *tzname[]; /* RS6000 and others want it this way. */
- #endif
- #endif
-
- /* SVr4 doesn't actually declare this in its #include files. */
- #ifdef USG5_4
- extern long timezone;
- #endif
-
- #ifdef VMS
- #ifdef VAXC
- #include "vmstime.h"
- #endif
- #endif
-
- /* 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
-
- /* EMACS_TIME is the type to use to represent temporal intervals.
- At one point this was 'struct timeval' on some systems, int on others.
- But this is stupid. Other things than select() code like to
- manipulate time values, and so microsecond precision should be
- maintained. Separate typedefs and conversion functions are provided
- for select().
-
- EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
- EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
-
- EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
- EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
-
- Note that all times are returned in "normalized" format (i.e. the
- usecs value is in the range 0 <= value < 1000000) and are assumed
- to be passed in in this format.
-
- 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.
-
- set_file_times (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_NORMALIZE_TIME (TIME) coerces TIME into normalized format.
-
- EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
- result in DEST. Either or both may be negative.
-
- EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
- stores the result in DEST. Either or both may be negative.
-
- EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
-
- EMACS_TIME_EQUAL (TIME1, TIME2) is true iff TIME1 is the same as TIME2.
- EMACS_TIME_GREATER (TIME1, TIME2) is true iff TIME1 is greater than
- TIME2.
- EMACS_TIME_EQUAL_OR_GREATER (TIME1, TIME2) is true iff TIME1 is
- greater than or equal to TIME2.
-
- */
-
- #ifdef HAVE_TIMEVAL
-
- #define EMACS_SELECT_TIME struct timeval
- #define EMACS_TIME_TO_SELECT_TIME(time, select_time) ((select_time) = (time))
-
- #else /* not HAVE_TIMEVAL */
-
- struct timeval
- {
- long tv_sec; /* seconds */
- long tv_usec; /* microseconds */
- };
-
- #define EMACS_SELECT_TIME int
- #define EMACS_TIME_TO_SELECT_TIME(time, select_time) \
- EMACS_TIME_TO_INT (time, select_time)
-
- #endif /* not HAVE_TIMEVAL */
-
- #define EMACS_TIME_TO_INT(time, intvar) \
- do { \
- EMACS_TIME tmptime = time; \
- \
- if (tmpime.tv_usec > 0) \
- (intvar) = tmptime.tv_sec + 1; \
- else \
- (intvar) = tmptime.tv_sec; \
- } while (0)
-
- #define EMACS_TIME struct timeval
- #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, microseconds) ((time).tv_usec = (microseconds))
-
- #if !defined (HAVE_GETTIMEOFDAY)
- struct timezone;
- extern int gettimeofday (struct timeval *, struct timezone *);
- #endif
-
- /* On SVR4, the compiler may complain if given this extra BSD arg. */
- #ifdef GETTIMEOFDAY_ONE_ARGUMENT
- # ifdef SOLARIS2
- /* Solaris (at least) omits this prototype. IRIX5 has it and chokes if we
- declare it here. */
- extern int gettimeofday (struct timeval *);
- # endif
- /* According to the Xt sources, some NTP daemons on some systems may
- return non-normalized values. */
- #define EMACS_GET_TIME(time) \
- do { \
- gettimeofday (&(time)); \
- EMACS_NORMALIZE_TIME (time); \
- } while (0)
- #else /* not GETTIMEOFDAY_ONE_ARGUMENT */
- #define EMACS_GET_TIME(time) \
- do { \
- struct timezone dummy; \
- gettimeofday (&(time), &dummy); \
- EMACS_NORMALIZE_TIME (time); \
- } while (0)
- #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
-
- #define EMACS_NORMALIZE_TIME(time) \
- do { \
- while ((time).tv_usec >= 1000000) \
- { \
- (time).tv_usec -= 1000000; \
- (time).tv_sec++; \
- } \
- while ((time).tv_usec < 0) \
- { \
- (time).tv_usec += 1000000; \
- (time).tv_sec--; \
- } \
- } while (0)
-
- #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; \
- EMACS_NORMALIZE_TIME (dest); \
- } 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; \
- EMACS_NORMALIZE_TIME (dest); \
- } while (0)
-
- #define EMACS_TIME_NEG_P(time) ((long)(time).tv_sec < 0)
-
- #define EMACS_TIME_EQUAL(time1, time2) \
- ((time1).tv_sec == (time2).tv_sec && \
- (time1).tv_usec == (time2).tv_usec)
-
- #define EMACS_TIME_GREATER(time1, time2) \
- ((time1).tv_sec > (time2).tv_sec || \
- ((time1).tv_sec == (time2).tv_sec && \
- (time1).tv_usec > (time2).tv_usec))
-
- #define EMACS_TIME_EQUAL_OR_GREATER(time1, time2) \
- ((time1).tv_sec > (time2).tv_sec || \
- ((time1).tv_sec == (time2).tv_sec && \
- (time1).tv_usec >= (time2).tv_usec))
-
- #define EMACS_SET_SECS_USECS(time, secs, usecs) \
- (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
-
- extern int set_file_times (char *filename, EMACS_TIME atime, EMACS_TIME mtime);
-
- #endif /* _XEMACS_SYSTIME_H_ */
-