Update.

2003-03-02  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/bits/posix_opt.h: Define
	_POSIX_MONOTONIC_CLOCK.
	* linuxthreads/sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Likewise.

6 files changed, 348 insertions, 1 deletions

diff --git a/sysdeps/unix/sysv/linux/clock_getres.c b/sysdeps/unix/sysv/linux/clock_getres.c
new file mode 100644
index 0000000000..442fbd5705
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/clock_getres.c
@@ -0,0 +1,76 @@
+/* Copyright (C) 2003 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, or (at your option) any later version.
+
+   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 <sysdep.h>
+
+#include "kernel-features.h"
+
+
+#ifdef __ASSUME_POSIX_TIMERS
+/* This means the REALTIME and MONOTONIC clock are definitely
+   supported in the kernel.  */
+# define SYSDEP_GETRES \
+  case CLOCK_REALTIME:							      \
+  case CLOCK_MONOTONIC:							      \
+    retval = INLINE_SYSCALL (clock_getres, 2, clock_id, res);		      \
+    break
+#elif defined __NR_clock_getres
+/* Is the syscall known to exist?  */
+extern int __libc_missing_posix_timers attribute_hidden;
+
+/* The REALTIME and MONOTONIC clock might be available.  Try the
+   syscall first.  */
+# define SYSDEP_GETRES \
+  case CLOCK_REALTIME:							      \
+  case CLOCK_MONOTONIC:							      \
+    {									      \
+      int e = EINVAL;							      \
+									      \
+      if (!__libc_missing_posix_timers)					      \
+	{								      \
+	  INTERNAL_SYSCALL_DECL (err);					      \
+	  int r = INTERNAL_SYSCALL (clock_getres, err, 2, clock_id, res);     \
+	  if (!INTERNAL_SYSCALL_ERROR_P (r, err))			      \
+	    {								      \
+	      retval = 0;						      \
+	      break;							      \
+	    }								      \
+									      \
+	  e = INTERNAL_SYSCALL_ERRNO (r, err);				      \
+	  if (e == ENOSYS)						      \
+	    {								      \
+	      __libc_missing_posix_timers = 1;				      \
+	      e = EINVAL;						      \
+	    }								      \
+	}								      \
+									      \
+      /* Fallback code.  */						      \
+      if (e == EINVAL && clock_id == CLOCK_REALTIME)			      \
+	HANDLE_REALTIME;						      \
+      else								      \
+	__set_errno (e);						      \
+    }									      \
+    break
+#endif
+
+#ifdef __NR_clock_getres
+/* We handled the REALTIME clock here.  */
+# define HANDLED_REALTIME	1
+#endif
+
+#include <sysdeps/posix/clock_getres.c>
diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c
new file mode 100644
index 0000000000..522fac32a7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/clock_gettime.c
@@ -0,0 +1,76 @@
+/* Copyright (C) 2003 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, or (at your option) any later version.
+
+   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 <sysdep.h>
+
+#include "kernel-features.h"
+
+
+#ifdef __ASSUME_POSIX_TIMERS
+/* This means the REALTIME and MONOTONIC clock are definitely
+   supported in the kernel.  */
+# define SYSDEP_GETTIME \
+  case CLOCK_REALTIME:							      \
+  case CLOCK_MONOTONIC:							      \
+    retval = INLINE_SYSCALL (clock_gettime, 2, clock_id, tp);		      \
+    break
+#elif defined __NR_clock_gettime
+/* Is the syscall known to exist?  */
+int __libc_missing_posix_timers attribute_hidden;
+
+/* The REALTIME and MONOTONIC clock might be available.  Try the
+   syscall first.  */
+# define SYSDEP_GETTIME \
+  case CLOCK_REALTIME:							      \
+  case CLOCK_MONOTONIC:							      \
+    {									      \
+      int e = EINVAL;							      \
+									      \
+      if (!__libc_missing_posix_timers)					      \
+	{								      \
+	  INTERNAL_SYSCALL_DECL (err);					      \
+	  int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp);     \
+	  if (!INTERNAL_SYSCALL_ERROR_P (r, err))			      \
+	    {								      \
+	      retval = 0;						      \
+	      break;							      \
+	    }								      \
+									      \
+	  e = INTERNAL_SYSCALL_ERRNO (r, err);				      \
+	  if (e == ENOSYS)						      \
+	    {								      \
+	      __libc_missing_posix_timers = 1;				      \
+	      e = EINVAL;						      \
+	    }								      \
+	}								      \
+									      \
+      /* Fallback code.  */						      \
+      if (e == EINVAL && clock_id == CLOCK_REALTIME)			      \
+	HANDLE_REALTIME;						      \
+      else								      \
+	__set_errno (e);						      \
+    }									      \
+    break
+#endif
+
+#ifdef __NR_clock_gettime
+/* We handled the REALTIME clock here.  */
+# define HANDLED_REALTIME	1
+#endif
+
+#include <sysdeps/unix/clock_gettime.c>
diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c
new file mode 100644
index 0000000000..ceb3801eb9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c
@@ -0,0 +1,65 @@
+/* Copyright (C) 2003 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, or (at your option) any later version.
+
+   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"
+
+
+#ifdef __ASSUME_POSIX_TIMERS
+/* We can simply use the syscall.  The CPU clocks are not supported
+   with this function.  */
+int
+clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
+		 struct timespec *rem)
+{
+  INTERNAL_SYSCALL_DECL (err);
+  int r;
+
+  r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
+  return (INTERNAL_SYSCALL_ERROR_P (r, err)
+	  ? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
+}
+
+#else
+# ifdef __NR_clock_nanosleep
+/* Is the syscall known to exist?  */
+extern int __libc_missing_posix_timers attribute_hidden;
+
+/* The REALTIME and MONOTONIC clock might be available.  Try the
+   syscall first.  */
+#  define SYSDEP_NANOSLEEP \
+  if (!__libc_missing_posix_timers)					      \
+    {									      \
+      INTERNAL_SYSCALL_DECL (err);					      \
+      int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags,     \
+				req, rem);				      \
+									      \
+      if (!INTERNAL_SYSCALL_ERROR_P (r, err))				      \
+	return 0;							      \
+									      \
+      if (INTERNAL_SYSCALL_ERRNO (r, err) != ENOSYS)			      \
+	return INTERNAL_SYSCALL_ERRNO (r, err);				      \
+      									      \
+      __libc_missing_posix_timers = 1;					      \
+    }
+# endif
+
+# include <sysdeps/unix/clock_nanosleep.c>
+#endif
diff --git a/sysdeps/unix/sysv/linux/clock_settime.c b/sysdeps/unix/sysv/linux/clock_settime.c
new file mode 100644
index 0000000000..d57c70e5e1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/clock_settime.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 2003 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, or (at your option) any later version.
+
+   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 <sysdep.h>
+
+#include "kernel-features.h"
+
+
+#ifdef __ASSUME_POSIX_TIMERS
+/* This means the REALTIME clock is definitely supported in the
+   kernel.  */
+# define SYSDEP_SETTIME \
+  case CLOCK_REALTIME:							      \
+    retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp);		      \
+    break
+#elif defined __NR_clock_settime
+/* Is the syscall known to exist?  */
+extern int __libc_missing_posix_timers attribute_hidden;
+
+/* The REALTIME clock might be available.  Try the syscall first.  */
+# define SYSDEP_SETTIME \
+  case CLOCK_REALTIME:							      \
+    {									      \
+      int e = EINVAL;							      \
+									      \
+      if (!__libc_missing_posix_timers)					      \
+	{								      \
+	  INTERNAL_SYSCALL_DECL (err);					      \
+	  int r = INTERNAL_SYSCALL (clock_settime, err, 2, clock_id, tp);     \
+	  if (!INTERNAL_SYSCALL_ERROR_P (r, err))			      \
+	    {								      \
+	      retval = 0;						      \
+	      break;							      \
+	    }								      \
+									      \
+	  e = INTERNAL_SYSCALL_ERRNO (r, err);				      \
+	  if (e == ENOSYS)						      \
+	    {								      \
+	      __libc_missing_posix_timers = 1;				      \
+	      e = EINVAL;						      \
+	    }								      \
+	}								      \
+									      \
+      /* Fallback code.  */						      \
+      if (e == EINVAL && clock_id == CLOCK_REALTIME)			      \
+	HANDLE_REALTIME;						      \
+      else								      \
+	__set_errno (e);						      \
+    }									      \
+    break
+#endif
+
+#ifdef __NR_clock_settime
+/* We handled the REALTIME clock here.  */
+# define HANDLED_REALTIME	1
+#endif
+
+#include <sysdeps/unix/clock_settime.c>
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index 239d6379b4..f9d1f09050 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -1,6 +1,6 @@
 /* Set flags signalling availability of kernel features based on given
    kernel version number.
-   Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2000, 2001, 2002, 2003 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
@@ -264,3 +264,9 @@
 # define __ASSUME_FCNTL64		1
 # define __ASSUME_VFORK_SYSCALL		1
 #endif
+
+/* Beginning with 2.5.63 support for realtime and monotonic clocks and
+   timers based on them is available.  */
+#if __LINUX_KERNEL_VERSION >= 132415
+# define __ASSUME_POSIX_TIMERS		1
+#endif
diff --git a/sysdeps/unix/sysv/linux/sysconf.c b/sysdeps/unix/sysv/linux/sysconf.c
new file mode 100644
index 0000000000..92b1e66782
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sysconf.c
@@ -0,0 +1,51 @@
+/* Get file-specific information about a file.  Linux version.
+   Copyright (C) 2003 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, or (at your option) any later version.
+
+   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 <sysdep.h>
+#include <time.h>
+#include <unistd.h>
+
+static long int posix_sysconf (int name);
+
+/* Define this first, so it can be inlined.  */
+#define __sysconf static posix_sysconf
+#include <sysdeps/posix/sysconf.c>
+
+
+/* Get the value of the system variable NAME.  */
+long int
+__sysconf (int name)
+{
+  switch (name)
+    {
+#ifdef __NR_clock_getres
+    case _SC_MONOTONIC_CLOCK:
+      /* Check using the clock_getres system call.  */
+      {
+	struct timespec ts;
+	INTERNAL_SYSCALL_DECL (err);
+	int r = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts);
+	return INTERNAL_SYSCALL_ERROR_P (r, err) ? 0 : 1;
+      }
+#endif
+
+    default:
+      return posix_sysconf (name);
+    }
+}