Monty b1d81974b2 Added support to MEM_ROOT for write protected memory ... This is useful for thing like Item_true and Item_false that we allocated and initalize once and want to ensure that nothing can change them Main changes: - Memory protection is achived by allocating memory with mmap() and protect it from write with mprotect() - init_alloc_root(...,MY_ROOT_USE_MPROTECT) will create a memroot that one can later use with protect_root() to turn it read only or turn it back to read-write. All allocations to this memroot is done with mmap() to ensure page alligned allocations. - alloc_root() code was rearranged to combine normal and valgrind code. - init_alloc_root() now changes block size to be power of 2's, to get less memory fragmentation. - Changed MEM_ROOT structure to make it smaller. Also renamed MEM_ROOT m_psi_key to psi_key. - Moved MY_THREAD_SPECIFIC marker in MEM_ROOT from block size (old hack) to flags. - Added global variable my_system_page_size. This is initialized at startup.		2021-07-18 19:59:35 +03:00
..
mysql-test/storage_engine
CMakeLists.txt
ha_myisammrg.cc	Added support to MEM_ROOT for write protected memory	2021-07-18 19:59:35 +03:00
ha_myisammrg.h	Added 'final' to some classes to improve generated code	2020-08-04 17:27:32 +02:00
myrg_close.c
myrg_create.c
myrg_def.h
myrg_delete.c
myrg_extra.c
myrg_info.c
myrg_locking.c
myrg_open.c
myrg_panic.c
myrg_queue.c
myrg_range.c
myrg_records.c
myrg_rfirst.c
myrg_rkey.c
myrg_rlast.c
myrg_rnext.c
myrg_rnext_same.c
myrg_rprev.c
myrg_rrnd.c
myrg_rsame.c
myrg_static.c
myrg_update.c
myrg_write.c