libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/libpthread/nptl/pthread_key_create.c b/libpthread/nptl/pthread_key_create.c
new file mode 100644
index 000000000..cf35bc877
--- /dev/null
+++ b/libpthread/nptl/pthread_key_create.c
@@ -0,0 +1,63 @@
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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 "pthreadP.h"
+
+
+/* Internal mutex for __pthread_keys table handling.  */
+lll_lock_t __pthread_keys_lock = LLL_LOCK_INITIALIZER;
+
+int
+__pthread_key_create (key, destr)
+     pthread_key_t *key;
+     void (*destr) (void *);
+{
+  int result = EAGAIN;
+  size_t cnt;
+
+  lll_lock (__pthread_keys_lock);
+
+  /* Find a slot in __pthread_kyes which is unused.  */
+  for (cnt = 0; cnt < PTHREAD_KEYS_MAX; ++cnt)
+    if (KEY_UNUSED (__pthread_keys[cnt].seq)
+	&& KEY_USABLE (__pthread_keys[cnt].seq))
+      {
+	/* We found an unused slot.  */
+	++__pthread_keys[cnt].seq;
+
+	/* Remember the destructor.  */
+	__pthread_keys[cnt].destr = destr;
+
+	/* Return the key to the caller.  */
+	*key = cnt;
+
+	/* The call succeeded.  */
+	result = 0;
+
+	/* We found a key and can stop now.  */
+	break;
+      }
+
+  lll_unlock (__pthread_keys_lock);
+
+  return result;
+}
+strong_alias (__pthread_key_create, pthread_key_create)
+strong_alias (__pthread_key_create, __pthread_key_create_internal)