1 files changed, 60 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/s390/sem_wait.c b/nptl/sysdeps/unix/sysv/linux/s390/sem_wait.c
new file mode 100644
index 0000000000..7050bad760
--- /dev/null
+++ b/nptl/sysdeps/unix/sysv/linux/s390/sem_wait.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.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 <lowlevelsem.h>
+#include <internaltypes.h>
+
+#include <shlib-compat.h>
+
+
+int
+__new_sem_wait (sem_t *sem)
+{
+  while (1)
+    {
+      int oldval;
+      int newval;
+
+      /* Atomically decrement semaphore counter if it is > 0.  */
+      lll_compare_and_swap ((int *) sem, oldval, newval,
+			    "ltr %2,%1; jnp 1f; ahi %2,-1");
+
+      /* oldval != newval if the semaphore count has been decremented.	*/
+      if (oldval != newval)
+	return 0;
+
+      /* Do wait.  */
+      int err = lll_futex_wait ((int *) sem, 0);
+
+      /* Handle EINTR.  */
+      if (err != 0 && err != -EWOULDBLOCK)
+	{
+	  __set_errno (-err);
+	  return -1;
+	}
+    }
+}
+
+versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1);
+#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
+strong_alias (__new_sem_wait, __old_sem_wait)
+compat_symbol (libpthread, __old_sem_wait, sem_wait, GLIBC_2_0);
+#endif