/* systime.h - System-dependent definitions for time manipulations.
- Copyright (C) 1993-1994, 2002-2012 Free Software Foundation, Inc.
+ Copyright (C) 1993-1994, 2002-2015 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include <timespec.h>
+INLINE_HEADER_BEGIN
+
#ifdef emacs
# ifdef HAVE_X_WINDOWS
# include <X11/X.h>
#endif
#endif
-#ifdef WINDOWSNT
#include <sys/time.h> /* for 'struct timeval' */
-#endif
\f
-/* The type to use to represent temporal intervals. It can be passed
- as the timeout argument to the pselect system call. */
-#define EMACS_TIME struct timespec
-
-/* Resolution of EMACS_TIME time stamps (in units per second), and log
- base 10 of the resolution. The log must be a positive integer. */
-#define EMACS_TIME_RESOLUTION 1000000000
-#define LOG10_EMACS_TIME_RESOLUTION 9
-
-/* EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
- EMACS_SECS_ADDR (time) is the address of the seconds component.
- EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
-
- EMACS_NSECS (TIME) is an rvalue for the nanoseconds component of TIME.
- EMACS_SET_NSECS (TIME, NANOSECONDS) sets that to NANOSECONDS.
-
- EMACS_SET_SECS_NSECS (TIME, SECS, NSECS) sets both components of TIME. */
-#define EMACS_SECS(time) ((time).tv_sec + 0)
-#define EMACS_NSECS(time) ((time).tv_nsec + 0)
-#define EMACS_SECS_ADDR(time) (&(time).tv_sec)
-#define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
-#define EMACS_SET_NSECS(time, ns) ((time).tv_nsec = (ns))
-#define EMACS_SET_SECS_NSECS(time, s, ns) \
- ((void) (EMACS_SET_SECS (time, s), EMACS_SET_NSECS (time, ns)))
-
-/* Convenience macros for older code that counts microseconds. */
-#define EMACS_SET_USECS(time, us) ((void) EMACS_SET_NSECS (time, (us) * 1000))
-#define EMACS_SET_SECS_USECS(time, secs, usecs) \
- (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
-
-/* Set TIME to an invalid time stamp. */
-#define EMACS_SET_INVALID_TIME(time) EMACS_SET_SECS_NSECS(time, 0, -1)
-
-/* Set TIME to the current system time. */
-#define EMACS_GET_TIME(time) gettime (&(time))
-
-/* Put into DEST the result of adding SRC1 to SRC2, or of subtracting
- SRC2 from SRC1. On overflow, store an extremal value. */
-#define EMACS_ADD_TIME(dest, src1, src2) ((dest) = timespec_add (src1, src2))
-#define EMACS_SUB_TIME(dest, src1, src2) ((dest) = timespec_sub (src1, src2))
-
-/* Return the sign of the valid time stamp TIME, either -1, 0, or 1. */
-#define EMACS_TIME_SIGN(time) timespec_sign (time)
-
-/* Return 1 if TIME is a valid time stamp. */
-#define EMACS_TIME_VALID_P(time) (0 <= (time).tv_nsec)
-
-/* Convert the double D to the greatest EMACS_TIME not greater than D.
- On overflow, return an extremal value. Return the minimum
- EMACS_TIME if D is not a number. */
-#define EMACS_TIME_FROM_DOUBLE(d) dtotimespec (d)
-
-/* Convert the Emacs time T to an approximate double value D. */
-#define EMACS_TIME_TO_DOUBLE(t) timespectod (t)
+/* Emacs uses struct timespec to represent nonnegative temporal intervals.
+
+ WARNING: Since tv_sec might be an unsigned value, do not use struct
+ timespec as a general-purpose data type for adding or subtracting
+ arbitrary time values! When computing A + B or A - B, typically A
+ should be an absolute time since the epoch and B a nonnegative offset. */
+
+/* Return an invalid timespec. */
+INLINE struct timespec
+invalid_timespec (void)
+{
+ return make_timespec (0, -1);
+}
+
+/* Return true if TIME is a valid timespec. This currently doesn't worry
+ about whether tv_nsec is less than TIMESPEC_RESOLUTION; leap seconds
+ might cause a problem if it did. */
+INLINE bool
+timespec_valid_p (struct timespec t)
+{
+ return t.tv_nsec >= 0;
+}
+
+/* Return current system time. */
+INLINE struct timespec
+current_timespec (void)
+{
+ struct timespec r;
+ gettime (&r);
+ return r;
+}
/* defined in sysdep.c */
-extern int set_file_times (int, const char *, EMACS_TIME, EMACS_TIME);
-extern struct timeval make_timeval (EMACS_TIME);
+extern int set_file_times (int, const char *, struct timespec, struct timespec);
+extern struct timeval make_timeval (struct timespec) ATTRIBUTE_CONST;
/* defined in keyboard.c */
-extern void set_waiting_for_input (EMACS_TIME *);
+extern void set_waiting_for_input (struct timespec *);
/* 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_lisp_time (EMACS_TIME);
-extern int decode_time_components (Lisp_Object, Lisp_Object, Lisp_Object,
- Lisp_Object, EMACS_TIME *, int *);
-extern EMACS_TIME lisp_time_argument (Lisp_Object, int *);
+extern Lisp_Object make_lisp_time (struct timespec);
+extern bool decode_time_components (Lisp_Object, Lisp_Object, Lisp_Object,
+ Lisp_Object, struct timespec *, double *);
+extern struct timespec lisp_time_argument (Lisp_Object);
#endif
-/* Compare times T1 and T2 for equality, inequality etc. */
-
-#define EMACS_TIME_EQ(T1, T2) (timespec_cmp (T1, T2) == 0)
-#define EMACS_TIME_NE(T1, T2) (timespec_cmp (T1, T2) != 0)
-#define EMACS_TIME_GT(T1, T2) (timespec_cmp (T1, T2) > 0)
-#define EMACS_TIME_GE(T1, T2) (timespec_cmp (T1, T2) >= 0)
-#define EMACS_TIME_LT(T1, T2) (timespec_cmp (T1, T2) < 0)
-#define EMACS_TIME_LE(T1, T2) (timespec_cmp (T1, T2) <= 0)
+INLINE_HEADER_END
#endif /* EMACS_SYSTIME_H */