/* systime.h - System-dependent definitions for time manipulations.
- Copyright (C) 1993-1994, 2002-2011 Free Software Foundation, Inc.
+ Copyright (C) 1993-1994, 2002-2013 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#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
-#include <time.h>
-#endif
+#include <timespec.h>
+
+INLINE_HEADER_BEGIN
+#ifndef SYSTIME_INLINE
+# define SYSTIME_INLINE INLINE
#endif
#ifdef emacs
# endif
#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 time_t timezone;
-#endif
-
/* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
disagree about the name of the guard symbol. */
#ifdef HPUX
#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.
-
- 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 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_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 if TIME is negative.
-*/
-
-#ifdef HAVE_TIMEVAL
-
-#define EMACS_HAS_USECS
-
-#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))
-
-/* 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) \
- ((long)(time).tv_sec < 0 \
- || ((time).tv_sec == 0 \
- && (long)(time).tv_usec < 0))
-
-#else /* ! defined (HAVE_TIMEVAL) */
-
-#define EMACS_TIME int
-#define EMACS_SECS(time) (time)
-#define EMACS_USECS(time) 0
-#define EMACS_SET_SECS(time, seconds) ((time) = (seconds))
-#define EMACS_SET_USECS(time, usecs) 0
-
-#define EMACS_GET_TIME(t) ((t) = time ((long *) 0))
-#define EMACS_ADD_TIME(dest, src1, src2) ((dest) = (src1) + (src2))
-#define EMACS_SUB_TIME(dest, src1, src2) ((dest) = (src1) - (src2))
-#define EMACS_TIME_NEG_P(t) ((t) < 0)
-
-#endif /* ! defined (HAVE_TIMEVAL) */
-
-#define EMACS_SET_SECS_USECS(time, secs, usecs) \
- (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
-
-extern int set_file_times (const char *, EMACS_TIME, EMACS_TIME);
+#include <sys/time.h> /* for 'struct timeval' */
+\f
+/* 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. */
+SYSTIME_INLINE struct timespec
+invalid_timespec (void)
+{
+ return make_timespec (0, -1);
+}
+
+/* Return 1 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. */
+SYSTIME_INLINE int
+timespec_valid_p (struct timespec t)
+{
+ return t.tv_nsec >= 0;
+}
+
+/* Return current system time. */
+SYSTIME_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 *, 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_time (time_t);
-extern int lisp_time_argument (Lisp_Object, time_t *, int *);
+/* defined in editfns.c */
+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. 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_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))
-
-/* Compare times T1 and T2 for equality, inequality etc. */
-
-#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)
+INLINE_HEADER_END
#endif /* EMACS_SYSTIME_H */