/* Copyright (C) 2002-2012 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, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <stdlib.h> #include "pthreadP.h" int __pthread_setspecific (key, value) 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) hidden_def (__pthread_setspecific)