bd76e69f8d
it's always better to provide the standard api directly Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/****************************************************************************
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* libs/libc/pthread/pthread_keydelete.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <pthread.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/tls.h>
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#if CONFIG_TLS_NELEM > 0
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_key_delete
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*
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* Description:
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* This POSIX function deletes a thread-specific data key
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* previously returned by pthread_key_create().
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*
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* Input Parameters:
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* key - the key to delete
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*
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* Returned Value:
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* Returns zero (OK) on success. EINVAL may be returned if an invalid
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* key is received.
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*
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* POSIX Compatibility:
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*
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****************************************************************************/
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int pthread_key_delete(pthread_key_t key)
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{
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FAR struct task_info_s *info = task_get_info();
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tls_ndxset_t mask;
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int ret = EINVAL;
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DEBUGASSERT(info != NULL);
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DEBUGASSERT(key >= 0 && key < CONFIG_TLS_NELEM);
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if (key >= 0 && key < CONFIG_TLS_NELEM)
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{
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/* This is done while holding a semaphore here to avoid concurrent
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* modification of the group TLS index set.
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*/
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mask = (tls_ndxset_t)1 << key;
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ret = _SEM_WAIT(&info->ta_sem);
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if (ret == OK)
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{
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DEBUGASSERT((info->ta_tlsset & mask) != 0);
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info->ta_tlsset &= ~mask;
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_SEM_POST(&info->ta_sem);
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}
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else
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{
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ret = _SEM_ERRNO(ret);
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}
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}
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return ret;
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}
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#endif /* CONFIG_TLS_NELEM */
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