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-rw-r--r--libpthread/nptl/pthread_key_create.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_key_create.c b/libpthread/nptl/pthread_key_create.c
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+++ b/libpthread/nptl/pthread_key_create.c
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+/* 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)