71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
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/****************************************************************************
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* fs/shm/shmfs.h
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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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#ifndef __FS_SHM_SHMFS_H
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#define __FS_SHM_SHMFS_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/fs/fs.h>
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern const struct file_operations shmfs_operations;
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct shmfs_object_s
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{
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/* Total number of bytes needed from physical memory. */
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size_t length;
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/* Vector of allocations from physical memory.
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*
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* - In flat and protected builds this is a pointer to the
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* allocated memory.
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*
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* - In kernel build this is start of a malloc'd vector of void pointers
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* and the length of the vector is MM_NPAGES(length).
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*/
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FAR void *paddr;
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/* The struct continues here as malloc'd array of void pointers
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* if CONFIG_BUILD_KERNEL
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*/
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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FAR struct shmfs_object_s *shmfs_alloc_object(size_t length);
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void shmfs_free_object(FAR struct shmfs_object_s *object);
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#endif
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