74aeb5d0c5
includes following parts: add support of sparc in arch/Kconfig add support of sparc in boards/Kconfig add sparc dir in arch, add sparc dir in boards add support of sparc in libs/libc/machine modify all the coding style problem about saprc
115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/****************************************************************************
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* arch/sparc/src/common/up_releasestack.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 <sched.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/kmalloc.h>
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#include "up_internal.h"
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_release_stack
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*
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* Description:
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* A task has been stopped. Free all stack related resources retained in
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* the defunct TCB.
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*
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* Input Parameters:
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* - dtcb: The TCB containing information about the stack to be released
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* - ttype: The thread type. This may be one of following (defined in
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* include/nuttx/sched.h):
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*
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* TCB_FLAG_TTYPE_TASK Normal user task
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* TCB_FLAG_TTYPE_PTHREAD User pthread
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* TCB_FLAG_TTYPE_KERNEL Kernel thread
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*
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* This thread type is normally available in the flags field of the TCB,
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* however, there are certain error recovery contexts where the TCB may
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* not be fully initialized when up_release_stack is called.
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*
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* If CONFIG_BUILD_KERNEL is defined, then this thread type may affect
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* how the stack is freed. For example, kernel thread stacks may have
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* been allocated from protected kernel memory. Stacks for user tasks
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* and threads must have come from memory that is accessible to user
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* code.
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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 up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
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{
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/* Is there a stack allocated? */
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if (dtcb->stack_alloc_ptr)
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{
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#if defined(CONFIG_BUILD_KERNEL) && defined(CONFIG_MM_KERNEL_HEAP)
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/* Use the kernel allocator if this is a kernel thread */
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if (ttype == TCB_FLAG_TTYPE_KERNEL)
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{
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if (kmm_heapmember(dtcb->stack_alloc_ptr))
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{
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kmm_free(dtcb->stack_alloc_ptr);
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}
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}
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else
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#endif
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{
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/* Use the user-space allocator if this is a task or pthread */
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if (umm_heapmember(dtcb->stack_alloc_ptr))
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{
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kmm_free(dtcb->stack_alloc_ptr);
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}
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}
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/* Mark the stack freed */
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dtcb->stack_alloc_ptr = NULL;
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}
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/* The size of the allocated stack is now zero */
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dtcb->adj_stack_size = 0;
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}
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