1 #ifndef JEMALLOC_INTERNAL_BASE_STRUCTS_H 2 #define JEMALLOC_INTERNAL_BASE_STRUCTS_H 3 4 #include "jemalloc/internal/jemalloc_internal_types.h" 5 #include "jemalloc/internal/mutex.h" 6 #include "jemalloc/internal/sc.h" 7 8 /* Embedded at the beginning of every block of base-managed virtual memory. */ 9 struct base_block_s { 10 /* Total size of block's virtual memory mapping. */ 11 size_t size; 12 13 /* Next block in list of base's blocks. */ 14 base_block_t *next; 15 16 /* Tracks unused trailing space. */ 17 extent_t extent; 18 }; 19 20 struct base_s { 21 /* Associated arena's index within the arenas array. */ 22 unsigned ind; 23 24 /* 25 * User-configurable extent hook functions. Points to an 26 * extent_hooks_t. 27 */ 28 atomic_p_t extent_hooks; 29 30 /* Protects base_alloc() and base_stats_get() operations. */ 31 malloc_mutex_t mtx; 32 33 /* Using THP when true (metadata_thp auto mode). */ 34 bool auto_thp_switched; 35 /* 36 * Most recent size class in the series of increasingly large base 37 * extents. Logarithmic spacing between subsequent allocations ensures 38 * that the total number of distinct mappings remains small. 39 */ 40 pszind_t pind_last; 41 42 /* Serial number generation state. */ 43 size_t extent_sn_next; 44 45 /* Chain of all blocks associated with base. */ 46 base_block_t *blocks; 47 48 /* Heap of extents that track unused trailing space within blocks. */ 49 extent_heap_t avail[SC_NSIZES]; 50 51 /* Stats, only maintained if config_stats. */ 52 size_t allocated; 53 size_t resident; 54 size_t mapped; 55 /* Number of THP regions touched. */ 56 size_t n_thp; 57 }; 58 59 #endif /* JEMALLOC_INTERNAL_BASE_STRUCTS_H */ 60