| #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 *pool, size_t initial_size); |
| |
| /* |
| * Discard all the memory the memory pool is responsible for. |
| */ |
| void mem_pool_discard(struct mem_pool *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); |
| |
| /* |
| * Allocate memory from the memory pool and copy str into it. |
| */ |
| char *mem_pool_strdup(struct mem_pool *pool, const char *str); |
| char *mem_pool_strndup(struct mem_pool *pool, const char *str, size_t len); |
| |
| /* |
| * 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 *pool, void *mem); |
| |
| #endif |