TLS: Add logic to get/set arbitrary TLS values
This commit is contained in:
Gregory Nutt
parent
d69dc04d96
commit
934069e422
8 changed files with 436 additions and 3 deletions
2
arch
2
arch
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@ -1 +1 @@
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Subproject commit 7195b24346e9d4115feff64d09f406ef31966630
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Subproject commit 42309e169e94db92096afb8f4b6957e84c6b6fc8
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@ -55,6 +55,11 @@
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# error CONFIG_TLS_LOG2_MAXSTACK is not defined
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#endif
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#ifndef CONFIG_TLS_NELEM
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# warning CONFIG_TLS_NELEM is not defined
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# define CONFIG_TLS_NELEM 0
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#endif
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/* TLS Definitions **********************************************************/
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#define TLS_STACK_ALIGN (1L << CONFIG_TLS_LOG2_MAXSTACK)
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@ -83,7 +88,10 @@
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struct tcb_s; /* Forward reference */
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struct tls_info_s
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{
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FAR struct tcb_s *tl_tcb; /* The TCB of the current task */
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FAR struct tcb_s *tl_tcb; /* The TCB of the current task */
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#if CONFIG_TLS_NELEM > 0
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uintptr_t tl_elem[CONFIG_TLS_NELEM]; /* TLS elements */
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#endif
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};
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/****************************************************************************
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@ -103,7 +111,7 @@ struct tls_info_s
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*
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* Returned Value:
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* An integer index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
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* corresponds to the currently executing CPU.
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* corresponds to the currently executing CPU
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*
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****************************************************************************/
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@ -111,5 +119,46 @@ struct tls_info_s
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int tls_cpu_index(void);
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#endif
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/****************************************************************************
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* Name: tls_get_element
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*
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* Description:
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* Return an the TLS element associated with the 'elem' index
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*
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* Input Parameters:
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* elem - Index of TLS element to return
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*
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* Returned Value:
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* The value of TLS element associated with 'elem'. Errors are not reported.
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* Aero is returned in the event of an error, but zero may also be valid
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* value and returned when there is no error. The only possible error would
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* be if elem >=CONFIG_TLS_NELEM.
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*
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****************************************************************************/
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#if CONFIG_TLS_NELEM > 0
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uintptr_t tls_get_element(int elem);
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#endif
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/****************************************************************************
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* Name: tls_get_element
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*
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* Description:
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* Set the TLS element associated with the 'elem' index to 'value'
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*
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* Input Parameters:
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* elem - Index of TLS element to set
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* value - The new value of the TLS element
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*
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* Returned Value:
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* None. Errors are not reported. The only possible error would be if
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* elem >=CONFIG_TLS_NELEM.
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*
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****************************************************************************/
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#if CONFIG_TLS_NELEM > 0
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void tls_set_element(int elem, uintptr_t value);
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#endif
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#endif /* CONFIG_TLS */
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#endif /* __INCLUDE_NUTTX_TLS_H */
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@ -537,6 +537,13 @@ config TLS_LOG2_MAXSTACK
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values will limit the maximum size of the stack (hence the naming
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of this configuration value).
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config TLS_NELEM
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int "Number of TLS elements"
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default 0
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---help---
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The number of unique TLS elements. These can be accessed with
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tls_get_element() and tls_set_element().
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endif # TLS
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menu "Pthread Options"
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51
sched/tls/Make.defs
Normal file
51
sched/tls/Make.defs
Normal file
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@ -0,0 +1,51 @@
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############################################################################
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# sched/tls/Make.defs
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#
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# Copyright (C) 2016 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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||||
# 2. Redistributions in binary form must reproduce the above copyright
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||||
# notice, this list of conditions and the following disclaimer in
|
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name NuttX nor the names of its contributors may be
|
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# used to endorse or promote products derived from this software
|
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# without specific prior written permission.
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||||
#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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||||
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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||||
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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ifeq ($(CONFIG_TLS),y)
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ifeq ($(CONFIG_SMP),y)
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CSRCS += tls_cpuindex.c
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endif
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ifneq ($(CONFIG_TLS_NELEM),0)
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CSRCS += tls_setelem.c tls_getelem.c
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endif
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# Include tls build support
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DEPPATH += --dep-path tls
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VPATH += :tls
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endif
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49
sched/tls/tls.h
Normal file
49
sched/tls/tls.h
Normal file
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@ -0,0 +1,49 @@
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/****************************************************************************
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* sched/tls/tls.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
|
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* used to endorse or promote products derived from this software
|
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* without specific prior written permission.
|
||||
*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __SCHED_TLS_TLS_H
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#define __SCHED_TLS_TLS_H
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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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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#endif /* __SCHED_TLS_TLS_H */
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97
sched/tls/tls_cpuindex.c
Normal file
97
sched/tls/tls_cpuindex.c
Normal file
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@ -0,0 +1,97 @@
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/****************************************************************************
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* libc/fixedmath/tls_cpuindex.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
|
||||
* are met:
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||||
*
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||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
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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 <nuttx/arch.h>
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#include <nuttx/sched.h>
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#include <nuttx/tls.h>
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#if defined(CONFIG_TLS) && defined(CONFIG_SMP)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tls_cpu_index
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*
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* Description:
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* Return an index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
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* corresponds to the currently executing CPU. This is index is retained
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* in the task TCB which is accessible via the tls_info_s structure.
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*
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* There is a race condition in that this thread could be swapped out and
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* be running on a different CPU when the function returns. If that is a
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* problem, then the calling function should disable pre-emption before
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* calling this function.
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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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* On success, an integer index is returned in the range of 0 through
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* (CONFIG_SMP_NCPUS-1) that corresponds to the currently executing CPU.
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*
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****************************************************************************/
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int tls_cpu_index(void)
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{
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FAR struct tls_info_s *info;
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FAR struct tcb_s *tcb;
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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 && info->tl_tcb != NULL);
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/* Get the TCB from the TLS info. We expect the TCB state to indicate that
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* the task is running (it must be because it is this thread).
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*/
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tcb = info->tl_tcb;
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DEBUGASSERT(tcb->task_state == TSTATE_TASK_RUNNING &&
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tcb->cpu <= (CONFIG_SMP_NCPUS-1));
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return tcb->cpu;
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}
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#endif /* CONFIG_TLS && CONFIG_SMP */
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92
sched/tls/tls_getelem.c
Normal file
92
sched/tls/tls_getelem.c
Normal file
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@ -0,0 +1,92 @@
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/****************************************************************************
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* libc/fixedmath/tls_getelem.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
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* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
|
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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 <stdint.h>
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#include <assert.h>
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#include <nuttx/arch.h>
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#include <nuttx/tls.h>
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#if defined(CONFIG_TLS) && 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_element
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*
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* Description:
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* Return an the TLS element associated with the 'elem' index
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*
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* Input Parameters:
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* elem - Index of TLS element to return
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*
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* Returned Value:
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* The value of TLS element associated with 'elem'. Errors are not reported.
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* Aero is returned in the event of an error, but zero may also be valid
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* value and returned when there is no error. The only possible error would
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* be if elem >=CONFIG_TLS_NELEM.
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*
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****************************************************************************/
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uintptr_t tls_get_element(int elem)
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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(elem >= 0 && elem < CONFIG_TLS_NELEM);
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if (elem >= 0 && elem < 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[elem];
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}
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return ret;
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}
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#endif /* CONFIG_TLS && CONFIG_TLS_NELEM > 0 */
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88
sched/tls/tls_setelem.c
Normal file
88
sched/tls/tls_setelem.c
Normal file
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@ -0,0 +1,88 @@
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/****************************************************************************
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* libc/fixedmath/tls_setelem.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
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* Author: Gregory Nutt <gnutt@nuttx.org>
|
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*
|
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
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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 <stdint.h>
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#include <assert.h>
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#include <nuttx/arch.h>
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#include <nuttx/tls.h>
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#if defined(CONFIG_TLS) && 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_element
|
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*
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* Description:
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* Set the TLS element associated with the 'elem' index to 'value'
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*
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* Input Parameters:
|
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* elem - Index of TLS element to set
|
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* value - The new value of the TLS element
|
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*
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* Returned Value:
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* None. Errors are not reported. The only possible error would be if
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* elem >=CONFIG_TLS_NELEM.
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*
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****************************************************************************/
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void tls_set_element(int elem, uintptr_t value)
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{
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FAR struct tls_info_s *info;
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DEBUGASSERT(elem >= 0 && elem < CONFIG_TLS_NELEM);
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if (elem >= 0 && elem < 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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|
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info = up_tls_info();
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DEBUGASSERT(info != NULL);
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/* Set the element value int the TLS info. */
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info->tl_elem[elem] = value;
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}
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}
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||||
#endif /* CONFIG_TLS && CONFIG_TLS_NELEM > 0 */
|
||||
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