Implement timespec_get

ChangeLog

@@ -28,6 +28,15 @@
 
 2011-12-23  Ulrich Drepper  <drepper@gmail.com>
 
+	[BZ #13532]
+	* time/Makefile (routines): Add timespec_get.
+	* time/Versions: Export timespec_get from libc for GLIBC_2.16.
+	* time/time.h: Define TIME_UTC and declare timespec_get.  Define
+	timespec for ISO C11.
+	* time/timespec_get.c: New file.
+	* sysdeps/unix/sysv/linux/timespec_get.c: New file.
+	* sysdeps/unix/sysv/linux/x86_64/timespec_get.c: New file.
+
 	[BZ #13531]
 	* malloc/malloc.c: Define alias aligned_alloc for public_mEMALIGn.
 	* stdlib/stdlib.h: Declare aligned_alloc.

NEWS

@@ -9,7 +9,7 @@ Version 2.16
 
 * The following bugs are resolved with this release:
 
-  13526, 13527, 13528, 13529, 13531
+  13526, 13527, 13528, 13529, 13531, 13532
 
 * ISO C11 support:
 
@@ -24,6 +24,7 @@ Version 2.16
     in the standard but it is only a requirement on the caller, not the
     implementation.
 
+  + timespec_get added
 
 Version 2.15
 

sysdeps/unix/sysv/linux/timespec_get.c

@@ -0,0 +1,57 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+
+#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
+# undef INTERNAL_VSYSCALL
+# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
+#else
+# include <bits/libc-vdso.h>
+#endif
+
+#ifndef INTERNAL_GETTIME
+# define INTERNAL_GETTIME(id, tp) \
+  INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
+#endif
+
+
+/* Set TS to calendar time based in time base BASE.  */
+int
+timespec_get (ts, base)
+     struct timespec *ts;
+     int base;
+{
+  switch (base)
+    {
+      int res;
+      INTERNAL_SYSCALL_DECL (err);
+    case TIME_UTC:
+      res = INTERNAL_GETTIME (CLOCK_REALTIME, ts);
+      if (INTERNAL_SYSCALL_ERROR_P (res, err))
+	return 0;
+      break;
+
+    default:
+      return 0;
+    }
+
+  return base;
+}

sysdeps/unix/sysv/linux/x86_64/timespec_get.c

@@ -0,0 +1,10 @@
+#include "bits/libc-vdso.h"
+
+#ifdef SHARED
+# define INTERNAL_GETTIME(id, tp) \
+  ({ long int (*f) (clockid_t, struct timespec *) = __vdso_clock_gettime; \
+  PTR_DEMANGLE (f);							  \
+  f (id, tp); })
+#endif
+
+#include "../timespec_get.c"

time/Makefile

@@ -1,4 +1,4 @@
-# Copyright (C) 1991-2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+# Copyright (C) 1991-2003, 2004, 2005, 2007, 2011 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
@@ -29,7 +29,8 @@ routines := offtime asctime clock ctime ctime_r difftime \
 	    tzfile getitimer setitimer			 \
 	    stime dysize timegm ftime			 \
 	    getdate strptime strptime_l			 \
-	    strftime wcsftime strftime_l wcsftime_l
+	    strftime wcsftime strftime_l wcsftime_l	 \
+	    timespec_get
 aux :=	    era alt_digit lc-time-cleanup
 distribute := datemsk
 

time/Versions

@@ -62,4 +62,7 @@ libc {
   GLIBC_2.3.2 {
     strptime_l;
   }
+  GLIBC_2.16 {
+    timespec_get;
+  }
 }

time/time.h

@@ -107,10 +107,11 @@ typedef __timer_t timer_t;
 #undef	__need_timer_t
 
 
-#if !defined __timespec_defined &&				\
-    ((defined _TIME_H &&					\
-      (defined __USE_POSIX199309 || defined __USE_MISC)) ||	\
-      defined __need_timespec)
+#if (!defined __timespec_defined					\
+     && ((defined _TIME_H						\
+	  && (defined __USE_POSIX199309 || defined __USE_MISC		\
+	      || defined __USE_ISOC11))					\
+	 || defined __need_timespec))
 # define __timespec_defined	1
 
 # include <bits/types.h>	/* This defines __time_t for us.  */
@@ -142,13 +143,13 @@ struct tm
   int tm_yday;			/* Days in year.[0-365]	*/
   int tm_isdst;			/* DST.		[-1/0/1]*/
 
-#ifdef	__USE_BSD
+# ifdef	__USE_BSD
   long int tm_gmtoff;		/* Seconds east of UTC.  */
   __const char *tm_zone;	/* Timezone abbreviation.  */
-#else
+# else
   long int __tm_gmtoff;		/* Seconds east of UTC.  */
   __const char *__tm_zone;	/* Timezone abbreviation.  */
-#endif
+# endif
 };
 __END_NAMESPACE_STD
 #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
@@ -156,7 +157,7 @@ __USING_NAMESPACE_STD(tm)
 #endif
 
 
-#ifdef __USE_POSIX199309
+# ifdef __USE_POSIX199309
 /* POSIX.1b structure for timer start values and intervals.  */
 struct itimerspec
   {
@@ -167,14 +168,23 @@ struct itimerspec
 /* We can use a simple forward declaration.  */
 struct sigevent;
 
-#endif	/* POSIX.1b */
+# endif	/* POSIX.1b */
 
-#ifdef __USE_XOPEN2K
-# ifndef __pid_t_defined
+# ifdef __USE_XOPEN2K
+#  ifndef __pid_t_defined
 typedef __pid_t pid_t;
-#  define __pid_t_defined
+#   define __pid_t_defined
+#  endif
+# endif
+
+
+# ifdef __USE_ISOC11
+/* Time base values for timespec_get.  */
+enum
+  {
+    TIME_UTC = 1
+  };
 # endif
-#endif
 
 
 __BEGIN_NAMESPACE_STD
@@ -353,6 +363,13 @@ extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW;
 #  endif
 
 
+# ifdef __USE_ISOC11
+/* Set TS to calendar time based in time base BASE.  */
+extern int timespec_get (struct timespec *__ts, int __base)
+     __THROW __nonnull ((1));
+# endif
+
+
 /* Create new per-process timer using CLOCK_ID.  */
 extern int timer_create (clockid_t __clock_id,
 			 struct sigevent *__restrict __evp,

time/timespec_get.c

@@ -0,0 +1,40 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <time.h>
+
+
+/* Set TS to calendar time based in time base BASE.  */
+int
+timespec_get (ts, base)
+     struct timespec *ts;
+     int base;
+{
+  switch (base)
+    {
+    case TIME_UTC:
+      /* Not supported.  */
+      return 0;
+
+    default:
+      return 0;
+    }
+
+  return base;
+}
+stub_warning (timespec_get)