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125 lines
4.7 KiB
C
125 lines
4.7 KiB
C
/* systime.h - System-dependent definitions for time manipulations.
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Copyright (C) 1993-1994, 2002-2012 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef EMACS_SYSTIME_H
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#define EMACS_SYSTIME_H
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#include <timespec.h>
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#ifdef emacs
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# ifdef HAVE_X_WINDOWS
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# include <X11/X.h>
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# else
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typedef unsigned long Time;
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# endif
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#endif
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/* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
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disagree about the name of the guard symbol. */
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#ifdef HPUX
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#ifdef _STRUCT_TIMEVAL
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#ifndef __TIMEVAL__
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#define __TIMEVAL__
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#endif
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#endif
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#endif
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/* The type to use to represent temporal intervals. It can be passed
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as the timeout argument to the pselect system call. */
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#define EMACS_TIME struct timespec
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/* Resolution of EMACS_TIME time stamps (in units per second), and log
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base 10 of the resolution. The log must be a positive integer. */
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#define EMACS_TIME_RESOLUTION 1000000000
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#define LOG10_EMACS_TIME_RESOLUTION 9
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/* EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
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EMACS_SECS_ADDR (time) is the address of the seconds component.
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EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
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EMACS_NSECS (TIME) is an rvalue for the nanoseconds component of TIME.
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EMACS_SET_NSECS (TIME, NANOSECONDS) sets that to NANOSECONDS.
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EMACS_SET_SECS_NSECS (TIME, SECS, NSECS) sets both components of TIME. */
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#define EMACS_SECS(time) ((time).tv_sec + 0)
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#define EMACS_NSECS(time) ((time).tv_nsec + 0)
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#define EMACS_SECS_ADDR(time) (&(time).tv_sec)
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#define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
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#define EMACS_SET_NSECS(time, ns) ((time).tv_nsec = (ns))
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#define EMACS_SET_SECS_NSECS(time, s, ns) \
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((void) (EMACS_SET_SECS (time, s), EMACS_SET_NSECS (time, ns)))
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/* Convenience macros for older code that counts microseconds. */
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#define EMACS_SET_USECS(time, us) ((void) EMACS_SET_NSECS (time, (us) * 1000))
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#define EMACS_SET_SECS_USECS(time, secs, usecs) \
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(EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
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/* Set TIME to an invalid time stamp. */
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#define EMACS_SET_INVALID_TIME(time) EMACS_SET_SECS_NSECS(time, 0, -1)
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/* Set TIME to the current system time. */
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#define EMACS_GET_TIME(time) gettime (&(time))
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/* Put into DEST the result of adding SRC1 to SRC2, or of subtracting
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SRC2 from SRC1. On overflow, store an extremal value. */
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#define EMACS_ADD_TIME(dest, src1, src2) ((dest) = timespec_add (src1, src2))
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#define EMACS_SUB_TIME(dest, src1, src2) ((dest) = timespec_sub (src1, src2))
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/* Return the sign of the valid time stamp TIME, either -1, 0, or 1. */
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#define EMACS_TIME_SIGN(time) timespec_sign (time)
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/* Return 1 if TIME is a valid time stamp. */
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#define EMACS_TIME_VALID_P(time) (0 <= (time).tv_nsec)
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/* Convert the double D to the greatest EMACS_TIME not greater than D.
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On overflow, return an extremal value. Return the minimum
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EMACS_TIME if D is not a number. */
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#define EMACS_TIME_FROM_DOUBLE(d) dtotimespec (d)
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/* Convert the Emacs time T to an approximate double value D. */
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#define EMACS_TIME_TO_DOUBLE(t) timespectod (t)
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/* defined in sysdep.c */
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extern int set_file_times (int, const char *, EMACS_TIME, EMACS_TIME);
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extern struct timeval make_timeval (EMACS_TIME);
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/* defined in keyboard.c */
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extern void set_waiting_for_input (EMACS_TIME *);
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/* When lisp.h is not included Lisp_Object is not defined (this can
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happen when this files is used outside the src directory).
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Use GCPRO1 to determine if lisp.h was included. */
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#ifdef GCPRO1
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/* defined in editfns.c */
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extern Lisp_Object make_lisp_time (EMACS_TIME);
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extern int decode_time_components (Lisp_Object, Lisp_Object, Lisp_Object,
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Lisp_Object, EMACS_TIME *, int *);
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extern EMACS_TIME lisp_time_argument (Lisp_Object, int *);
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#endif
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/* Compare times T1 and T2 for equality, inequality etc. */
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#define EMACS_TIME_EQ(T1, T2) (timespec_cmp (T1, T2) == 0)
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#define EMACS_TIME_NE(T1, T2) (timespec_cmp (T1, T2) != 0)
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#define EMACS_TIME_GT(T1, T2) (timespec_cmp (T1, T2) > 0)
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#define EMACS_TIME_GE(T1, T2) (timespec_cmp (T1, T2) >= 0)
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#define EMACS_TIME_LT(T1, T2) (timespec_cmp (T1, T2) < 0)
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#define EMACS_TIME_LE(T1, T2) (timespec_cmp (T1, T2) <= 0)
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#endif /* EMACS_SYSTIME_H */
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