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authorRoland McGrath <roland@gnu.org>2003-03-11 09:30:37 +0000
committerRoland McGrath <roland@gnu.org>2003-03-11 09:30:37 +0000
commitb33e61633a10a233510f6f49b97b7e2ad15c7311 (patch)
tree9b6025b692435f629bc771dca74dcfb48e41768a /nptl/sysdeps/unix/sysv/linux/ia64/sem_trywait.c
parent5d5d5969b17422e3b1af6f88436e91f32a36fd58 (diff)
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* sysdeps/generic/dl-sysdep.c (_dl_important_hwcaps): If CNT == 1,
	allocate space even for the trailing '/'.
	Reported by John Reiser <jreiser@BitWagon.com>.

	* sysdeps/unix/sysv/linux/ia64/sysdep.h (LOAD_ARGS_6, ASM_ARGS_6,
	ASM_CLOBBERS_6): Define.
	(ASM_CLOBBERS_5): Use ASM_CLOBBERS_6.
	* sysdeps/unix/sysv/linux/ia64/clone2.S (__clone2): Reorder arguments
	to match IA-32 order.
	* sysdeps/unix/sysv/linux/i386/clone.S: Fix comment.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/ia64/sem_trywait.c')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/ia64/sem_trywait.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/sem_trywait.c b/nptl/sysdeps/unix/sysv/linux/ia64/sem_trywait.c
new file mode 100644
index 0000000000..a07d3468a3
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/ia64/sem_trywait.c
@@ -0,0 +1,50 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@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; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <internaltypes.h>
+
+#include <shlib-compat.h>
+
+
+int
+__new_sem_trywait (sem_t *sem)
+{
+  int oldval, val = *(int *) sem;
+
+  do
+    {
+      if (__builtin_expect (val == 0, 0))
+	{
+	  __set_errno (EAGAIN);
+	  return -1;
+	}
+      oldval = val;
+    }
+  while ((val = lll_compare_and_swap ((int *) sem, oldval, oldval - 1))
+	 != oldval);
+  return 0;
+}
+versioned_symbol (libpthread, __new_sem_trywait, sem_trywait, GLIBC_2_1);
+#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
+strong_alias (__new_sem_trywait, __old_sem_trywait)
+compat_symbol (libpthread, __old_sem_trywait, sem_trywait, GLIBC_2_0);
+#endif