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Diffstat (limited to 'libpthread/nptl/pthread_setspecific.c')
-rw-r--r--libpthread/nptl/pthread_setspecific.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_setspecific.c b/libpthread/nptl/pthread_setspecific.c
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+++ b/libpthread/nptl/pthread_setspecific.c
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+/* Copyright (C) 2002, 2003, 2006 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 <stdlib.h>
+#include "pthreadP.h"
+
+
+int
+__pthread_setspecific (
+ pthread_key_t key,
+ const void *value)
+{
+ struct pthread *self;
+ unsigned int idx1st;
+ unsigned int idx2nd;
+ struct pthread_key_data *level2;
+ unsigned int seq;
+
+ self = THREAD_SELF;
+
+ /* Special case access to the first 2nd-level block. This is the
+ usual case. */
+ if (__builtin_expect (key < PTHREAD_KEY_2NDLEVEL_SIZE, 1))
+ {
+ /* Verify the key is sane. */
+ if (KEY_UNUSED ((seq = __pthread_keys[key].seq)))
+ /* Not valid. */
+ return EINVAL;
+
+ level2 = &self->specific_1stblock[key];
+
+ /* Remember that we stored at least one set of data. */
+ if (value != NULL)
+ THREAD_SETMEM (self, specific_used, true);
+ }
+ else
+ {
+ if (key >= PTHREAD_KEYS_MAX
+ || KEY_UNUSED ((seq = __pthread_keys[key].seq)))
+ /* Not valid. */
+ return EINVAL;
+
+ idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+ idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+
+ /* This is the second level array. Allocate it if necessary. */
+ level2 = THREAD_GETMEM_NC (self, specific, idx1st);
+ if (level2 == NULL)
+ {
+ if (value == NULL)
+ /* We don't have to do anything. The value would in any case
+ be NULL. We can save the memory allocation. */
+ return 0;
+
+ level2
+ = (struct pthread_key_data *) calloc (PTHREAD_KEY_2NDLEVEL_SIZE,
+ sizeof (*level2));
+ if (level2 == NULL)
+ return ENOMEM;
+
+ THREAD_SETMEM_NC (self, specific, idx1st, level2);
+ }
+
+ /* Pointer to the right array element. */
+ level2 = &level2[idx2nd];
+
+ /* Remember that we stored at least one set of data. */
+ THREAD_SETMEM (self, specific_used, true);
+ }
+
+ /* Store the data and the sequence number so that we can recognize
+ stale data. */
+ level2->seq = seq;
+ level2->data = (void *) value;
+
+ return 0;
+}
+strong_alias (__pthread_setspecific, pthread_setspecific)
+strong_alias (__pthread_setspecific, __pthread_setspecific_internal)