📦 yjhjstz / mempool

nginx like memory pool

nginx memory pool mode:

where create the memory pool, set the memory pool size is its node size;

• when alloc memory size < node size; alloc it from one of the pool node;

when all the node doesn't have enough memory for alloc, alloc new node;

• when alloc memory size >= node size; alloc large chunk for it, likely using malloc directly;

• free: the memory pool won't release the alloc size < node size block until destroy the pool;

large chunk which size > node size, can be released using mp_free, likely free;

• reuse: mpresetpool can release all the large chunk in the pool,

but don't release all the allocated node, just reset them for reuse;

advantages

• reduce the malloc times to promote performance;

• an reset memory pool can be used for same type work, as web connection;

• using freemempoollist and usedmempoollist to promote mem_pool reuse;

disadvantages

• linear scan to free larger memory