128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/****************************************************************************
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* sched/task/task_tls_alloc.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 <sys/types.h>
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#include <unistd.h>
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#include <sched.h>
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#include <errno.h>
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#include <nuttx/tls.h>
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#include <nuttx/semaphore.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#if CONFIG_TLS_TASK_NELEM > 0
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static tls_task_ndxset_t g_tlsset;
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static sem_t g_tlssem = SEM_INITIALIZER(1);
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static tls_dtor_t g_tlsdtor[CONFIG_TLS_TASK_NELEM];
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: task_tls_allocs
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*
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* Description:
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* Allocate a global-unique task local storage data index
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*
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* Input Parameters:
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* dtor - The destructor of task local storage data element
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*
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* Returned Value:
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* A TLS index that is unique.
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*
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****************************************************************************/
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int task_tls_alloc(tls_dtor_t dtor)
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{
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int ret;
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int candidate;
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ret = nxsem_wait(&g_tlssem);
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if (ret < 0)
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{
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return ret;
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}
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ret = -EUSERS;
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for (candidate = 0; candidate < CONFIG_TLS_TASK_NELEM; candidate++)
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{
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tls_task_ndxset_t mask = (tls_task_ndxset_t)1 << candidate;
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if ((g_tlsset & mask) == 0)
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{
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g_tlsset |= mask;
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g_tlsdtor[candidate] = dtor;
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ret = candidate;
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break;
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}
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}
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nxsem_post(&g_tlssem);
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return ret;
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}
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/****************************************************************************
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* Name: task_tls_destruct
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*
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* Description:
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* Destruct all TLS data element associated with allocated key
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void task_tls_destruct(void)
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{
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int candidate;
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uintptr_t elem;
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tls_dtor_t dtor;
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FAR struct task_info_s *info = task_get_info();
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for (candidate = 0; candidate < CONFIG_TLS_TASK_NELEM; candidate++)
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{
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tls_task_ndxset_t mask = (tls_task_ndxset_t)1 << candidate;
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if ((g_tlsset & mask) != 0)
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{
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elem = info->ta_telem[candidate];
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dtor = g_tlsdtor[candidate];
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if (dtor != NULL && elem != 0)
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{
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dtor((void *)elem);
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}
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}
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}
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}
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#endif
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