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408 lines
13 KiB
C
408 lines
13 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2022 The Apache Software Foundation (ASF)
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* SPDX-FileContributor: 2019-2022 Espressif Systems (Shanghai) CO LTD
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*/
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the 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,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* 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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* @addtogroup OSKernel
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* @{
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* @defgroup OSMempool Memory Pools
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* @{
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*/
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#ifndef _OS_MEMPOOL_H_
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#define _OS_MEMPOOL_H_
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#include <stdbool.h>
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#include "os/os.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* A memory block structure. This simply contains a pointer to the free list
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* chain and is only used when the block is on the free list. When the block
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* has been removed from the free list the entire memory block is usable by the
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* caller.
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*/
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struct os_memblock {
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SLIST_ENTRY(os_memblock) mb_next;
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};
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/* XXX: Change this structure so that we keep the first address in the pool? */
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/* XXX: add memory debug structure and associated code */
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/* XXX: Change how I coded the SLIST_HEAD here. It should be named:
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SLIST_HEAD(,os_memblock) mp_head; */
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/**
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* Memory pool
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*/
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struct os_mempool {
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/** Size of the memory blocks, in bytes. */
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uint32_t mp_block_size;
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/** The number of memory blocks. */
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uint16_t mp_num_blocks;
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/** The number of free blocks left */
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uint16_t mp_num_free;
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/** The lowest number of free blocks seen */
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uint16_t mp_min_free;
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/** Bitmap of OS_MEMPOOL_F_[...] values. */
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uint8_t mp_flags;
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/** Address of memory buffer used by pool */
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uint32_t mp_membuf_addr;
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STAILQ_ENTRY(os_mempool) mp_list;
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SLIST_HEAD(,os_memblock);
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/** Name for memory block */
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const char *name;
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};
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/**
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* Indicates an extended mempool. Address can be safely cast to
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* (struct os_mempool_ext *).
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*/
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#define OS_MEMPOOL_F_EXT 0x01
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struct os_mempool_ext;
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/**
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* Block put callback function. If configured, this callback gets executed
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* whenever a block is freed to the corresponding extended mempool. Note: The
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* os_memblock_put() function calls this callback instead of freeing the block
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* itself. Therefore, it is the callback's responsibility to free the block
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* via a call to os_memblock_put_from_cb().
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*
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* @param ome The extended mempool that a block is being
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* freed back to.
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* @param data The block being freed.
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* @param arg Optional argument configured along with the
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* callback.
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*
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* @return Indicates whether the block was successfully
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* freed. A non-zero value should only be
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* returned if the block was not successfully
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* released back to its pool.
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*/
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typedef os_error_t os_mempool_put_fn(struct os_mempool_ext *ome, void *data,
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void *arg);
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struct os_mempool_ext {
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struct os_mempool mpe_mp;
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/* Callback that is executed immediately when a block is freed. */
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os_mempool_put_fn *mpe_put_cb;
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void *mpe_put_arg;
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};
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#define OS_MEMPOOL_INFO_NAME_LEN (32)
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/**
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* Information describing a memory pool, used to return OS information
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* to the management layer.
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*/
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struct os_mempool_info {
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/** Size of the memory blocks in the pool */
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int omi_block_size;
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/** Number of memory blocks in the pool */
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int omi_num_blocks;
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/** Number of free memory blocks */
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int omi_num_free;
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/** Minimum number of free memory blocks ever */
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int omi_min_free;
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/** Name of the memory pool */
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char omi_name[OS_MEMPOOL_INFO_NAME_LEN];
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};
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/**
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* Get information about the next system memory pool.
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*
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* @param mempool The current memory pool, or NULL if starting iteration.
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* @param info A pointer to the structure to return memory pool information
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* into.
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*
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* @return The next memory pool in the list to get information about, or NULL
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* when at the last memory pool.
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*/
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struct os_mempool *os_mempool_info_get_next(struct os_mempool *,
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struct os_mempool_info *);
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#if (OS_ALIGNMENT == 4)
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typedef uint32_t os_membuf_t;
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#elif (OS_ALIGNMENT == 8)
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typedef uint64_t os_membuf_t;
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#elif (OS_ALIGNMENT == 16)
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typedef __uint128_t os_membuf_t;
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#else
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#error "Unhandled `OS_ALIGNMENT` for `os_membuf_t`"
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#endif /* OS_ALIGNMENT == * */
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#define OS_MEMPOOL_SIZE(n,blksize) ((((blksize) + ((OS_ALIGNMENT)-1)) / (OS_ALIGNMENT)) * (n))
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/** Calculates the number of bytes required to initialize a memory pool. */
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#define OS_MEMPOOL_BYTES(n,blksize) \
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(sizeof (os_membuf_t) * OS_MEMPOOL_SIZE((n), (blksize)))
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#if SOC_ESP_NIMBLE_CONTROLLER
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/**
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* Initialize a memory pool.
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*
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* @param mp Pointer to a pointer to a mempool
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* @param blocks The number of blocks in the pool
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* @param blocks_size The size of the block, in bytes.
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* @param membuf Pointer to memory to contain blocks.
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* @param name Name of the pool.
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*
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* @return os_error_t
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*/
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os_error_t r_os_mempool_init(struct os_mempool *mp, uint16_t blocks,
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uint32_t block_size, void *membuf, const char *name);
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#define os_mempool_init r_os_mempool_init
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/**
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* Initializes an extended memory pool. Extended attributes (e.g., callbacks)
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* are not specified when this function is called; they are assigned manually
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* after initialization.
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*
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* @param mpe The extended memory pool to initialize.
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* @param blocks The number of blocks in the pool.
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* @param block_size The size of each block, in bytes.
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* @param membuf Pointer to memory to contain blocks.
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* @param name Name of the pool.
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*
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* @return os_error_t
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*/
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os_error_t r_os_mempool_ext_init(struct os_mempool_ext *mpe, uint16_t blocks,
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uint32_t block_size, void *membuf, const char *name);
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#define os_mempool_ext_init r_os_mempool_ext_init
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/**
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* Removes the specified mempool from the list of initialized mempools.
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*
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* @param mp The mempool to unregister.
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*
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* @return 0 on success;
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* OS_INVALID_PARM if the mempool is not
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* registered.
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*/
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os_error_t r_os_mempool_unregister(struct os_mempool *mp);
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#define os_mempool_unregister r_os_mempool_unregister
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/**
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* Clears a memory pool.
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*
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* @param mp The mempool to clear.
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*
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* @return os_error_t
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*/
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os_error_t r_os_mempool_clear(struct os_mempool *mp);
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#define os_mempool_clear r_os_mempool_clear
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/**
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* Performs an integrity check of the specified mempool. This function
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* attempts to detect memory corruption in the specified memory pool.
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*
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* @param mp The mempool to check.
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*
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* @return true if the memory pool passes the integrity
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* check;
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* false if the memory pool is corrupt.
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*/
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bool r_os_mempool_is_sane(const struct os_mempool *mp);
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#define os_mempool_is_sane r_os_mempool_is_sane
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/**
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* Checks if a memory block was allocated from the specified mempool.
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*
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* @param mp The mempool to check as parent.
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* @param block_addr The memory block to check as child.
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*
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* @return 0 if the block does not belong to the mempool;
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* 1 if the block does belong to the mempool.
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*/
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int r_os_memblock_from(const struct os_mempool *mp, const void *block_addr);
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#define os_memblock_from r_os_memblock_from
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/**
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* Get a memory block from a memory pool
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*
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* @param mp Pointer to the memory pool
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*
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* @return void* Pointer to block if available; NULL otherwise
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*/
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void *r_os_memblock_get(struct os_mempool *mp);
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#define os_memblock_get r_os_memblock_get
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/**
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* Puts the memory block back into the pool, ignoring the put callback, if any.
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* This function should only be called from a put callback to free a block
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* without causing infinite recursion.
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*
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* @param mp Pointer to memory pool
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* @param block_addr Pointer to memory block
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*
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* @return os_error_t
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*/
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os_error_t r_os_memblock_put_from_cb(struct os_mempool *mp, void *block_addr);
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#define os_memblock_put_from_cb r_os_memblock_put_from_cb
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/**
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* Puts the memory block back into the pool
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*
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* @param mp Pointer to memory pool
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* @param block_addr Pointer to memory block
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*
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* @return os_error_t
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*/
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os_error_t r_os_memblock_put(struct os_mempool *mp, void *block_addr);
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#define os_memblock_put r_os_memblock_put
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#else
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/**
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* Initialize a memory pool.
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*
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* @param mp Pointer to a pointer to a mempool
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* @param blocks The number of blocks in the pool
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* @param blocks_size The size of the block, in bytes.
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* @param membuf Pointer to memory to contain blocks.
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* @param name Name of the pool.
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*
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* @return os_error_t
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*/
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os_error_t os_mempool_init(struct os_mempool *mp, uint16_t blocks,
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uint32_t block_size, void *membuf, const char *name);
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/**
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* Initializes an extended memory pool. Extended attributes (e.g., callbacks)
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* are not specified when this function is called; they are assigned manually
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* after initialization.
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*
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* @param mpe The extended memory pool to initialize.
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* @param blocks The number of blocks in the pool.
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* @param block_size The size of each block, in bytes.
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* @param membuf Pointer to memory to contain blocks.
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* @param name Name of the pool.
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*
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* @return os_error_t
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*/
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os_error_t os_mempool_ext_init(struct os_mempool_ext *mpe, uint16_t blocks,
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uint32_t block_size, void *membuf, const char *name);
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/**
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* Removes the specified mempool from the list of initialized mempools.
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*
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* @param mp The mempool to unregister.
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*
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* @return 0 on success;
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* OS_INVALID_PARM if the mempool is not
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* registered.
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*/
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os_error_t os_mempool_unregister(struct os_mempool *mp);
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/**
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* Clears a memory pool.
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*
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* @param mp The mempool to clear.
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*
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* @return os_error_t
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*/
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os_error_t os_mempool_clear(struct os_mempool *mp);
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/**
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* Clears an extended memory pool.
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*
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* @param mpe The extended memory pool to clear.
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*
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* @return os_error_t
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*/
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os_error_t os_mempool_ext_clear(struct os_mempool_ext *mpe);
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/**
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* Performs an integrity check of the specified mempool. This function
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* attempts to detect memory corruption in the specified memory pool.
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*
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* @param mp The mempool to check.
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*
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* @return true if the memory pool passes the integrity
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* check;
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* false if the memory pool is corrupt.
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*/
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bool os_mempool_is_sane(const struct os_mempool *mp);
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/**
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* Checks if a memory block was allocated from the specified mempool.
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*
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* @param mp The mempool to check as parent.
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* @param block_addr The memory block to check as child.
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*
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* @return 0 if the block does not belong to the mempool;
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* 1 if the block does belong to the mempool.
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*/
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int os_memblock_from(const struct os_mempool *mp, const void *block_addr);
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/**
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* Get a memory block from a memory pool
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*
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* @param mp Pointer to the memory pool
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*
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* @return void* Pointer to block if available; NULL otherwise
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*/
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void *os_memblock_get(struct os_mempool *mp);
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/**
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* Puts the memory block back into the pool, ignoring the put callback, if any.
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* This function should only be called from a put callback to free a block
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* without causing infinite recursion.
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*
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* @param mp Pointer to memory pool
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* @param block_addr Pointer to memory block
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*
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* @return os_error_t
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*/
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os_error_t os_memblock_put_from_cb(struct os_mempool *mp, void *block_addr);
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/**
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* Puts the memory block back into the pool
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*
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* @param mp Pointer to memory pool
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* @param block_addr Pointer to memory block
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*
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* @return os_error_t
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*/
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os_error_t os_memblock_put(struct os_mempool *mp, void *block_addr);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _OS_MEMPOOL_H_ */
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/**
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* @} OSMempool
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* @} OSKernel
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*/
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