35 lines
722 B
C
35 lines
722 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <commonlib/helpers.h>
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#include <commonlib/mem_pool.h>
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void *mem_pool_alloc(struct mem_pool *mp, size_t sz)
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{
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void *p;
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/* Make all allocations be at least 8 byte aligned. */
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sz = ALIGN_UP(sz, 8);
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/* Determine if any space available. */
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if ((mp->size - mp->free_offset) < sz)
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return NULL;
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p = &mp->buf[mp->free_offset];
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mp->free_offset += sz;
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mp->last_alloc = p;
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return p;
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}
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void mem_pool_free(struct mem_pool *mp, void *p)
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{
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/* Determine if p was the most recent allocation. */
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if (p == NULL || mp->last_alloc != p)
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return;
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mp->free_offset = mp->last_alloc - mp->buf;
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/* No way to track allocation before this one. */
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mp->last_alloc = NULL;
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}
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