111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/****************************************************************************
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* libs/libc/tls/tls_getvalue.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 <assert.h>
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#include <errno.h>
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#include <nuttx/arch.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: tls_get_value
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*
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* Description:
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* Return an the TLS data value associated with the 'tlsindx'
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*
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* Input Parameters:
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* tlsindex - Index of TLS data element to return
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*
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* Returned Value:
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* The value of TLS element associated with 'tlsindex'. Errors are not
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* reported. Zero is returned in the event of an error, but zero may also
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* be valid value and returned when there is no error. The only possible
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* error would be if tlsindex < 0 or tlsindex >=CONFIG_TLS_NELEM.
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*
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****************************************************************************/
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uintptr_t tls_get_value(int tlsindex)
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{
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FAR struct tls_info_s *info;
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uintptr_t ret = 0;
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DEBUGASSERT(tlsindex >= 0 && tlsindex < CONFIG_TLS_NELEM);
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if (tlsindex >= 0 && tlsindex < CONFIG_TLS_NELEM)
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{
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/* Get the TLS info structure from the current threads stack */
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info = up_tls_info();
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DEBUGASSERT(info != NULL);
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/* Get the element value from the TLS info. */
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ret = info->tl_elem[tlsindex];
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}
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return ret;
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}
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#endif /* CONFIG_TLS_NELEM > 0 */
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#if CONFIG_TLS_TASK_NELEM > 0
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/****************************************************************************
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* Name: task_tls_get_value
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*
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* Description:
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* Return an the task local storage data value associated with 'tlsindx'
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*
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* Input Parameters:
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* tlsindex - Index of task local storage data element to return
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*
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* Returned Value:
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* The value of TLS element associated with 'tlsindex'. Errors are not
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* reported. Zero is returned in the event of an error, but zero may also
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* be valid value and returned when there is no error. The only possible
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* error would be if tlsindex < 0 or tlsindex >=CONFIG_TLS_TASK_NELEM.
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*
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****************************************************************************/
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uintptr_t task_tls_get_value(int tlsindex)
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{
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FAR struct task_info_s *info = task_get_info();
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if (tlsindex >= 0 && tlsindex < CONFIG_TLS_TASK_NELEM)
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{
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return info->ta_telem[tlsindex];
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}
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return 0;
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}
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#endif
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