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sortix--sortix/libpthread/pthread_setspecific.c++
2014-07-08 17:41:51 +02:00

58 lines
1.9 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2014.
This file is part of Sortix libpthread.
Sortix libpthread 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 3 of the License, or (at your
option) any later version.
Sortix libpthread 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 Sortix libpthread. If not, see <http://www.gnu.org/licenses/>.
pthread_setspecific.c++
Thread-specific data management.
*******************************************************************************/
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
extern "C" int pthread_setspecific(pthread_key_t key, const void* value_const)
{
void* value = (void*) value_const;
struct pthread* thread = pthread_self();
if ( key < thread->keys_length )
return thread->keys[key] = value, 0;
pthread_mutex_lock(&__pthread_keys_lock);
assert(key < __pthread_keys_length);
assert(__pthread_keys[key].destructor);
pthread_mutex_unlock(&__pthread_keys_lock);
size_t old_length = thread->keys_length;
size_t new_length = __pthread_keys_length;
size_t new_size = new_length * sizeof(void*);
void** new_keys = (void**) realloc(thread->keys, new_size);
if ( !new_keys )
return errno;
thread->keys = new_keys;
thread->keys_length = new_length;
for ( size_t i = old_length; i < new_length; i++ )
new_keys[i] = NULL;
return thread->keys[key] = value, 0;
}