diff options
Diffstat (limited to 'nptl/pthread_key_create.c')
| -rw-r--r-- | nptl/pthread_key_create.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/nptl/pthread_key_create.c b/nptl/pthread_key_create.c new file mode 100644 index 0000000000..7a073f2d80 --- /dev/null +++ b/nptl/pthread_key_create.c @@ -0,0 +1,68 @@ +/* Copyright (C) 2002 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_kyes table handling. */ +lll_lock_t __pthread_keys_lock = LLL_LOCK_INITIALIZER; + + +/* For debugging purposes put the maximum number of keys in a variable. */ +const int __linuxthreads_pthread_keys_max = PTHREAD_KEYS_MAX; +const int __linuxthreads_pthread_key_2ndlevel_size = PTHREAD_KEY_2NDLEVEL_SIZE; + + +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) |