zephyr/include/mempool_sys.h

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/*
* Copyright (c) 2020 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_MEMPOOL_SYS_H_
/**
* @defgroup mem_pool_apis Memory Pool APIs
* @ingroup kernel_apis
* @{
*/
/* Note on sizing: the use of a 20 bit field for block means that,
* assuming a reasonable minimum block size of 16 bytes, we're limited
* to 16M of memory managed by a single pool. Long term it would be
* good to move to a variable bit size based on configuration.
*/
struct k_mem_block_id {
u32_t pool : 8;
u32_t level : 4;
u32_t block : 20;
};
struct k_mem_block {
void *data;
struct k_mem_block_id id;
};
/** @} */
struct k_mem_pool {
struct sys_mem_pool_base base;
_wait_q_t wait_q;
};
#define Z_MEM_POOL_DEFINE(name, minsz, maxsz, nmax, align) \
char __aligned(WB_UP(align)) _mpool_buf_##name[WB_UP(maxsz) * nmax \
+ _MPOOL_BITS_SIZE(maxsz, minsz, nmax)]; \
struct sys_mem_pool_lvl \
_mpool_lvls_##name[Z_MPOOL_LVLS(maxsz, minsz)]; \
Z_STRUCT_SECTION_ITERABLE(k_mem_pool, name) = { \
.base = { \
.buf = _mpool_buf_##name, \
.max_sz = WB_UP(maxsz), \
.n_max = nmax, \
.n_levels = Z_MPOOL_LVLS(maxsz, minsz), \
.levels = _mpool_lvls_##name, \
.flags = SYS_MEM_POOL_KERNEL \
} \
}; \
BUILD_ASSERT(WB_UP(maxsz) >= _MPOOL_MINBLK)
#endif /* ZEPHYR_INCLUDE_MEMPOOL_SYS_H_ */