0e58301d81
Add functions for:
- combining two memory pools
- determining if a memory address is within the range managed by a
memory pool
These functions will be used by future commits.
Signed-off-by: Jameson Miller <jamill@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
#ifndef MEM_POOL_H
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#define MEM_POOL_H
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struct mp_block {
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struct mp_block *next_block;
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char *next_free;
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char *end;
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uintmax_t space[FLEX_ARRAY]; /* more */
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};
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struct mem_pool {
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struct mp_block *mp_block;
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/*
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* The amount of available memory to grow the pool by.
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* This size does not include the overhead for the mp_block.
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*/
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size_t block_alloc;
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/* The total amount of memory allocated by the pool. */
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size_t pool_alloc;
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};
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/*
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* Initialize mem_pool with specified initial size.
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*/
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void mem_pool_init(struct mem_pool **mem_pool, size_t initial_size);
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/*
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* Discard a memory pool and free all the memory it is responsible for.
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*/
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void mem_pool_discard(struct mem_pool *mem_pool);
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/*
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* Alloc memory from the mem_pool.
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*/
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void *mem_pool_alloc(struct mem_pool *pool, size_t len);
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/*
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* Allocate and zero memory from the memory pool.
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*/
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void *mem_pool_calloc(struct mem_pool *pool, size_t count, size_t size);
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/*
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* Move the memory associated with the 'src' pool to the 'dst' pool. The 'src'
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* pool will be empty and not contain any memory. It still needs to be free'd
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* with a call to `mem_pool_discard`.
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*/
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void mem_pool_combine(struct mem_pool *dst, struct mem_pool *src);
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/*
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* Check if a memory pointed at by 'mem' is part of the range of
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* memory managed by the specified mem_pool.
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*/
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int mem_pool_contains(struct mem_pool *mem_pool, void *mem);
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#endif
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