From 09402f5bc1d87787c84dbf75d41777c87b1ce40e Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 25 Mar 2003 20:41:26 +0000
Subject: 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.
---
 nptl/sysdeps/unix/sysv/linux/timer_routines.c | 81 +++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 nptl/sysdeps/unix/sysv/linux/timer_routines.c

(limited to 'nptl/sysdeps/unix/sysv/linux/timer_routines.c')

diff --git a/nptl/sysdeps/unix/sysv/linux/timer_routines.c b/nptl/sysdeps/unix/sysv/linux/timer_routines.c
new file mode 100644
index 0000000000..3f69aa64fd
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/timer_routines.c
@@ -0,0 +1,81 @@
+/* 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 <setjmp.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+#include "kernel-posix-timers.h"
+
+
+#ifdef __NR_timer_create
+/* Helper thread to call the user-provided function.  */
+static void *
+timer_sigev_thread (void *arg)
+{
+  struct timer *tk = (struct timer *) arg;
+
+  /* Call the user-provided function.  */
+  tk->thrfunc (tk->sival);
+
+  return NULL;
+}
+
+
+/* Helper function to support starting threads for SIGEV_THREAD.  */
+void *
+attribute_hidden
+__timer_helper_thread (void *arg)
+{
+  /* Block all signals.  */
+  sigset_t ss;
+
+  sigfillset (&ss);
+  (void) pthread_sigmask (SIG_BLOCK, &ss, NULL);
+
+  struct timer *tk = (struct timer *) arg;
+
+  /* Synchronize with the parent.  */
+  (void) pthread_barrier_wait (&tk->bar);
+
+  /* We will only wait for the signal the kernel will send.  */
+  sigemptyset (&ss);
+  sigaddset (&ss, TIMER_SIG);
+
+  /* Endless loop of waiting for signals.  The loop is only ended when
+     the thread is canceled.  */
+  while (1)
+    {
+      siginfo_t si;
+
+      if (sigwaitinfo (&ss, &si) > 0 && si.si_timerid == tk->ktimerid)
+	{
+	  /* That the signal we are waiting for.  */
+	  pthread_t th;
+	  (void) pthread_create (&th, &tk->attr, timer_sigev_thread, arg);
+	}
+    }
+}
+
+#endif
+
+#ifndef __ASSUME_POSIX_TIMERS
+# include <nptl/sysdeps/pthread/timer_routines.c>
+#endif
-- 
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