Update.

2003-03-25  Ulrich Drepper  <drepper@redhat.com>

	* csu/tst-atomic.c: Adjust tests to what atomic_add_negative and
	atomic_add_zero were supposed to do.
	* include/atomic.h: Adjust atomic_add_negative and atomic_add_zero
	to x86 behavior.

	* sysdeps/generic/bits/typesizes.h (__TIMER_T_TYPE): Define as void*.
	This matches the new timer implementation.
	* sysdeps/unix/sysv/linux/bits/siginfo.h (struct siginfo): Adjust
	timer info for what the kernel provides these days.
	(struct sigevent): Add _tid field.
	Define SIGEV_THREAD_ID.

	* Versions.def (librt): Add GLIBC_2.3.3.

	* abilist/libpthread.abilist: Update for nptl.

1 files changed, 235 insertions, 0 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/timer_create.c b/nptl/sysdeps/unix/sysv/linux/timer_create.c
new file mode 100644
index 0000000000..637d925168
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/timer_create.c
@@ -0,0 +1,235 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   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; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include <internaltypes.h>
+#include "kernel-posix-timers.h"
+
+
+#ifdef __NR_timer_create
+# ifndef __ASSUME_POSIX_TIMERS
+#  define timer_create static compat_timer_create
+#  include <nptl/sysdeps/pthread/timer_create.c>
+#  undef timer_create
+
+/* Nonzero if the system calls are not available.  */
+int __no_posix_timers attribute_hidden;
+# endif
+
+# ifdef timer_create_alias
+#  define timer_create timer_create_alias
+# endif
+
+
+int
+timer_create (clock_id, evp, timerid)
+     clockid_t clock_id;
+     struct sigevent *evp;
+     timer_t *timerid;
+{
+# undef timer_create
+# ifndef __ASSUME_POSIX_TIMERS
+  if  (__no_posix_timers >= 0)
+# endif
+    {
+      /* If the user wants notification via a thread we need to handle
+	 this special.  */
+      if (evp == NULL
+	  || __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
+	{
+	  kernel_timer_t ktimerid;
+	  int retval = INLINE_SYSCALL (timer_create, 3, clock_id, evp,
+				       &ktimerid);
+
+# ifndef __ASSUME_POSIX_TIMERS
+	  if (retval != -1 || errno != ENOSYS)
+# endif
+	    {
+# ifndef __ASSUME_POSIX_TIMERS
+	      __no_posix_timers = 1;
+#endif
+
+	      if (retval != -1)
+		{
+		  struct timer *newp;
+
+		  /* We avoid allocating too much memory by basically
+		     using struct timer as a derived class with the
+		     first two elements being in the superclass.  We only
+		     need these two elements here.  */
+		  newp = (struct timer *) malloc (offsetof (struct timer,
+							    thrfunc));
+		  if (newp != NULL)
+		    {
+		      newp->sigev_notify = (evp != NULL
+					    ? evp->sigev_notify
+					    : SIGEV_SIGNAL);
+		      newp->ktimerid = ktimerid;
+
+		      *timerid = (timer_t) newp;
+		    }
+		  else
+		    {
+		      /* No memory.  Free the kernel timer.  */
+		      INTERNAL_SYSCALL_DECL (err);
+		      (void) INTERNAL_SYSCALL (timer_delete, err, 1, ktimerid);
+
+		      retval = -1;
+		    }
+		}
+
+	      return retval;
+	    }
+	}
+      else
+	{
+#ifndef __ASSUME_POSIX_TIMERS
+	  /* Make sure we have the necessary kernel support.  */
+	  if (__no_posix_timers == 0)
+	    {
+	      INTERNAL_SYSCALL_DECL (err);
+	      struct timespec ts;
+	      int res = INTERNAL_SYSCALL (clock_getres, err, 1, &ts);
+	      __no_posix_timers = (INTERNAL_SYSCALL_ERROR_P (res, err)
+				   ? -1 : 1);
+	    }
+
+	  if (__no_posix_timers > 0)
+#endif
+	    {
+		  sigset_t ss;
+		  sigemptyset (&ss);
+		  sigaddset (&ss, TIMER_SIG);
+		  pthread_sigmask (SIG_BLOCK, &ss, NULL);
+	      struct timer *newp;
+
+	      newp = (struct timer *) malloc (sizeof (struct timer));
+	      if (newp == NULL)
+		return -1;
+
+	      /* Copy the thread parameters the user provided.  */
+	      newp->sival = evp->sigev_value;
+	      newp->thrfunc = evp->sigev_notify_function;
+
+	      /* We cannot simply copy the thread attributes since the
+		 implementation might keep internal information for
+		 each instance.  */
+	      (void) pthread_attr_init (&newp->attr);
+	      if (evp->sigev_notify_attributes != NULL)
+		{
+		  struct pthread_attr *nattr;
+		  struct pthread_attr *oattr;
+
+		  nattr = (struct pthread_attr *) &newp->attr;
+		  oattr = (struct pthread_attr *) evp->sigev_notify_attributes;
+
+		  nattr->schedparam = oattr->schedparam;
+		  nattr->schedpolicy = oattr->schedpolicy;
+		  nattr->flags = oattr->flags;
+		  nattr->guardsize = oattr->guardsize;
+		  nattr->stackaddr = oattr->stackaddr;
+		  nattr->stacksize = oattr->stacksize;
+		}
+
+	      /* In any case set the detach flag.  */
+	      (void) pthread_attr_setdetachstate (&newp->attr,
+						  PTHREAD_CREATE_DETACHED);
+
+	      /* Set up the barrier for sychronization.  */
+	      (void) pthread_barrier_init (&newp->bar, NULL, 2);
+
+	      /* The helper thread needs only very little resources
+		 and should go away automatically when canceled.  */
+	      pthread_attr_t attr;
+	      (void) pthread_attr_init (&attr);
+	      (void) pthread_attr_setdetachstate (&attr,
+						  PTHREAD_CREATE_DETACHED);
+	      (void) pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
+
+	      /* Create the helper thread for this timer.  */
+	      int res = pthread_create (&newp->th, &attr,
+					__timer_helper_thread, newp);
+	      if (res != 0)
+		goto err_out;
+
+	      /* No need for the attribute anymore.  */
+	      (void) pthread_attr_destroy (&attr);
+
+	      /* Create the event structure for the kernel timer.  */
+	      struct sigevent sev;
+	      sev.sigev_value.sival_ptr = newp;
+	      sev.sigev_signo = TIMER_SIG;
+	      sev.sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID;
+	      /* This is the thread ID of the helper thread.  */
+	      sev._sigev_un._pad[0] = ((struct pthread *) newp->th)->tid;
+
+	      /* Wait until the helper thread is set up.  */
+	      (void) pthread_barrier_wait (&newp->bar);
+
+	      /* No need for the barrier anymore.  */
+	      (void) pthread_barrier_destroy (&newp->bar);
+
+	      /* Create the timer.  */
+	      INTERNAL_SYSCALL_DECL (err);
+	      res = INTERNAL_SYSCALL (timer_create, err, 3, clock_id, &sev,
+				      &newp->ktimerid);
+	      if (! INTERNAL_SYSCALL_ERROR_P (res, err))
+		{
+		  *timerid = (timer_t) newp;
+		  return 0;
+		}
+
+	      /* Something went wrong.  Kill the thread.  */
+	      pthread_cancel (newp->th);
+	      /* Free the resources.  */
+	      res = INTERNAL_SYSCALL_ERRNO (res, err);
+	    err_out:
+	      free (newp);
+	      __set_errno (res);
+	      return -1;
+	    }
+	}
+
+# ifndef __ASSUME_POSIX_TIMERS
+      /* When we come here the syscall does not exist.  Make sure we
+	 do not try to use it again.  */
+      __no_posix_timers = -1;
+# endif
+    }
+
+# ifndef __ASSUME_POSIX_TIMERS
+  /* Compatibility code.  */
+  return compat_timer_create (clock_id, evp, timerid);
+# endif
+}
+#else
+# ifdef timer_create_alias
+#  define timer_create timer_create_alias
+# endif
+/* The new system calls are not available.  Use the userlevel
+   implementation.  */
+# include <nptl/sysdeps/pthread/timer_create.c>
+#endif