git/mem-pool.h, branch v2.26.1

block alloc: add validations around cache_entry lifecyle

2018-07-03T17:58:27Z

Add an option (controlled by an environment variable) perform extra validations on mem_pool allocated cache entries. When set: 1) Invalidate cache_entry memory when discarding cache_entry. 2) When discarding index_state struct, verify that all cache_entries were allocated from expected mem_pool. 3) When discarding mem_pools, invalidate mem_pool memory. This should provide extra checks that mem_pools and their allocated cache_entries are being used as expected. Signed-off-by: Jameson Miller Signed-off-by: Junio C Hamano

mem-pool: fill out functionality

2018-07-03T17:58:27Z

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 Signed-off-by: Junio C Hamano

mem-pool: add life cycle management functions

2018-07-03T17:58:27Z

Add initialization and discard functions to mem_pool type. As the memory allocated by mem_pool can now be freed, we also track the large allocations. If the there are existing mp_blocks in the mem_poo's linked list of mp_blocksl, then the mp_block for a large allocation is inserted behind the head block. This is because only the head mp_block is considered when searching for availble space. This results in the following desirable properties: 1) The mp_block allocated for the large request will not be included not included in the search for available in future requests, the large mp_block is sized for the specific request and does not contain any spare space. 2) The head mp_block will not bumped from considation for future memory requests just because a request for a large chunk of memory came in. These changes are in preparation for a future commit that will utilize creating and discarding memory pool. Signed-off-by: Jameson Miller Signed-off-by: Junio C Hamano

mem-pool: move reusable parts of memory pool into its own file

2018-04-12T02:55:20Z

This moves the reusable parts of the memory pool logic used by fast-import.c into its own file for use by other components. Signed-off-by: Jameson Miller Signed-off-by: Junio C Hamano