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- #ifndef MEM_POOL_H
- #define MEM_POOL_H
-
- struct mp_block {
- struct mp_block *next_block;
- char *next_free;
- char *end;
- uintmax_t space[FLEX_ARRAY]; /* more */
- };
-
- struct mem_pool {
- struct mp_block *mp_block;
-
- /*
- * The amount of available memory to grow the pool by.
- * This size does not include the overhead for the mp_block.
- */
- size_t block_alloc;
-
- /* The total amount of memory allocated by the pool. */
- size_t pool_alloc;
- };
-
- /*
- * Initialize mem_pool with specified initial size.
- */
- void mem_pool_init(struct mem_pool **mem_pool, size_t initial_size);
-
- /*
- * Discard a memory pool and free all the memory it is responsible for.
- */
- void mem_pool_discard(struct mem_pool *mem_pool, int invalidate_memory);
-
- /*
- * Alloc memory from the mem_pool.
- */
- void *mem_pool_alloc(struct mem_pool *pool, size_t len);
-
- /*
- * Allocate and zero memory from the memory pool.
- */
- void *mem_pool_calloc(struct mem_pool *pool, size_t count, size_t size);
-
- /*
- * Move the memory associated with the 'src' pool to the 'dst' pool. The 'src'
- * pool will be empty and not contain any memory. It still needs to be free'd
- * with a call to `mem_pool_discard`.
- */
- void mem_pool_combine(struct mem_pool *dst, struct mem_pool *src);
-
- /*
- * Check if a memory pointed at by 'mem' is part of the range of
- * memory managed by the specified mem_pool.
- */
- int mem_pool_contains(struct mem_pool *mem_pool, void *mem);
-
- #endif
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