Move current_timespec decl to timespec.h

This change was motivated by the desire to remove the weird
dependency of lib-src/profile.o on src/systime.h.  profile.c
included systime.h only for current_timespec, and this
inclusion required systime.h to have #ifdef emacs in multiple
places and complicated further changes I have in mind.
The current_timespec decl belongs in timespec.h anyway,
and the main effect of this change is to move it there.
* lib-src/profile.c (INLINE): Remove.
Include timespec.h, not systime.h.
* lib/gettime.c (gettime): Prefer clock_gettime to nanotime,
and don’t worry about it failing on a CLOCK_REALTIME arg.
POSIX requires it to succeed and I don’t know of any
counterexamples where the fallbacks would work.
(current_timespec): Move here from src/systime.h.
Nowadays it seems to be better to not have this function
be inline.
* lib/timespec.h: Include arg-nonnull.h.
(current_timespec): New declaration.
(gettime, settime): Declare args to be nonnull.
* lib/gettime.c, lib/timespec.h: Copy from Gnulib.
* src/systime.h: Simplify by assuming ‘emacs’ is defined,
which it always is now.
(current_timespec): Move to lib/timespec.h.

1 files changed, 3 insertions, 19 deletions

diff --git a/src/systime.h b/src/systime.h
index ede3d4eb12d..ad5ab857308 100644
--- a/src/systime.h
+++ b/src/systime.h
@@ -23,12 +23,10 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
 INLINE_HEADER_BEGIN
 
-#ifdef emacs
-# ifdef HAVE_X_WINDOWS
-#  include <X11/X.h>
-# else
+#ifdef HAVE_X_WINDOWS
+# include <X11/X.h>
+#else
 typedef unsigned long Time;
-# endif
 #endif
 
 /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
@@ -66,15 +64,6 @@ 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 *, struct timespec, struct timespec);
 extern struct timeval make_timeval (struct timespec) ATTRIBUTE_CONST;
@@ -82,10 +71,6 @@ extern struct timeval make_timeval (struct timespec) ATTRIBUTE_CONST;
 /* defined in keyboard.c */
 extern void set_waiting_for_input (struct timespec *);
 
-/* When lisp.h is not included Lisp_Object is not defined (this can
-   happen when this file is used outside the src directory).  */
-#ifdef emacs
-
 /* Emacs uses the integer list (HI LO US PS) to represent the time
    (HI << LO_TIME_BITS) + LO + US / 1e6 + PS / 1e12.  */
 enum { LO_TIME_BITS = 16 };
@@ -103,7 +88,6 @@ extern int decode_time_components (Lisp_Object, Lisp_Object, Lisp_Object,
                                    Lisp_Object, struct lisp_time *, double *);
 extern struct timespec lisp_to_timespec (struct lisp_time);
 extern struct timespec lisp_time_argument (Lisp_Object);
-#endif
 
 INLINE_HEADER_END