103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2018 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#ifndef ZEPHYR_INCLUDE_MISC_MEMPOOL_H_
|
|
#define ZEPHYR_INCLUDE_MISC_MEMPOOL_H_
|
|
|
|
#include <kernel.h>
|
|
#include <misc/mempool_base.h>
|
|
|
|
struct sys_mem_pool {
|
|
struct sys_mem_pool_base base;
|
|
struct k_mutex *mutex;
|
|
};
|
|
|
|
struct sys_mem_pool_block {
|
|
struct sys_mem_pool *pool;
|
|
u32_t level : 4;
|
|
u32_t block : 28;
|
|
};
|
|
|
|
/**
|
|
* @brief Statically define system memory pool
|
|
*
|
|
* The memory pool's buffer contains @a n_max blocks that are @a max_size bytes
|
|
* long. The memory pool allows blocks to be repeatedly partitioned into
|
|
* quarters, down to blocks of @a min_size bytes long. The buffer is aligned
|
|
* to a @a align -byte boundary.
|
|
*
|
|
* If the pool is to be accessed outside the module where it is defined, it
|
|
* can be declared via
|
|
*
|
|
* @code extern struct sys_mem_pool <name>; @endcode
|
|
*
|
|
* This pool will not be in an initialized state. You will still need to
|
|
* run sys_mem_pool_init() on it before using any other APIs.
|
|
*
|
|
* @param name Name of the memory pool.
|
|
* @param kmutex Pointer to an initialized k_mutex object, used for
|
|
* synchronization, declared with K_MUTEX_DEFINE().
|
|
* @param minsz Size of the smallest blocks in the pool (in bytes).
|
|
* @param maxsz Size of the largest blocks in the pool (in bytes).
|
|
* @param nmax Number of maximum sized blocks in the pool.
|
|
* @param align Alignment of the pool's buffer (power of 2).
|
|
* @param section Destination binary section for pool data
|
|
*/
|
|
#define SYS_MEM_POOL_DEFINE(name, kmutex, minsz, maxsz, nmax, align, section) \
|
|
char __aligned(align) _GENERIC_SECTION(section) \
|
|
_mpool_buf_##name[_ALIGN4(maxsz * nmax) \
|
|
+ _MPOOL_BITS_SIZE(maxsz, minsz, nmax)]; \
|
|
struct sys_mem_pool_lvl _GENERIC_SECTION(section) \
|
|
_mpool_lvls_##name[_MPOOL_LVLS(maxsz, minsz)]; \
|
|
_GENERIC_SECTION(section) struct sys_mem_pool name = { \
|
|
.base = { \
|
|
.buf = _mpool_buf_##name, \
|
|
.max_sz = maxsz, \
|
|
.n_max = nmax, \
|
|
.n_levels = _MPOOL_LVLS(maxsz, minsz), \
|
|
.levels = _mpool_lvls_##name, \
|
|
.flags = SYS_MEM_POOL_USER \
|
|
}, \
|
|
.mutex = kmutex, \
|
|
}
|
|
|
|
/**
|
|
* @brief Initialize a memory pool
|
|
*
|
|
* This is intended to complete initialization of memory pools that have been
|
|
* declared with SYS_MEM_POOL_DEFINE().
|
|
*
|
|
* @param p Memory pool to initialize
|
|
*/
|
|
static inline void sys_mem_pool_init(struct sys_mem_pool *p)
|
|
{
|
|
_sys_mem_pool_base_init(&p->base);
|
|
}
|
|
|
|
/**
|
|
* @brief Allocate a block of memory
|
|
*
|
|
* Allocate a chunk of memory from a memory pool. This cannot be called from
|
|
* interrupt context.
|
|
*
|
|
* @param p Address of the memory pool
|
|
* @param size Requested size of the memory block
|
|
* @return A pointer to the requested memory, or NULL if none is available
|
|
*/
|
|
void *sys_mem_pool_alloc(struct sys_mem_pool *p, size_t size);
|
|
|
|
/**
|
|
* @brief Free memory allocated from a memory pool
|
|
*
|
|
* Free memory previously allocated by sys_mem_pool_alloc().
|
|
* It is safe to pass NULL to this function, in which case it is a no-op.
|
|
*
|
|
* @param ptr Pointer to previously allocated memory
|
|
*/
|
|
void sys_mem_pool_free(void *ptr);
|
|
|
|
#endif
|