f4609b896f
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because there is some breakage in the git build related to the netrc credentials helper which someone has taken care of in nixpkgs. The stable channel is not used for anything other than git, so this should be fine. Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
63 lines
1.6 KiB
C
63 lines
1.6 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 *pool, size_t initial_size);
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/*
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* Discard all the memory the memory pool is responsible for.
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*/
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void mem_pool_discard(struct mem_pool *pool, int invalidate_memory);
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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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* Allocate memory from the memory pool and copy str into it.
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*/
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char *mem_pool_strdup(struct mem_pool *pool, const char *str);
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char *mem_pool_strndup(struct mem_pool *pool, const char *str, size_t len);
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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 *pool, void *mem);
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#endif
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