/* * %CopyrightBegin% * * Copyright Ericsson AB 2014. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in * compliance with the License. You should have received a copy of the * Erlang Public License along with this software. If not, it can be * retrieved online at http://www.erlang.org/. * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. * * %CopyrightEnd% */ #ifndef __ERL_MAP_H__ #define __ERL_MAP_H__ #include "sys.h" /* instrinsic wrappers */ #if defined(__GNUC__) #define hashmap_clz(x) ((Uint32) __builtin_clz((unsigned int)(x))) #define hashmap_bitcount(x) ((Uint32) __builtin_popcount((unsigned int) (x))) #else Uint32 hashmap_clz(Uint32 x); Uint32 hashmap_bitcount(Uint32 x); #endif /* MAP */ typedef struct map_s { Eterm thing_word; Uint size; Eterm keys; /* tuple */ } map_t; /* map node * * ----------- * Eterm THING * Uint size * Eterm Keys -> {K1, K2, K3, ..., Kn} where n = size * ---- * Eterm V1 * ... * Eterm Vn, where n = size * ----------- */ /* the head-node is a bitmap or array with an untagged size */ #define hashmap_size(x) (((hashmap_head_t*) hashmap_val(x))->size) #define hashmap_size_rel(RTERM, BASE) hashmap_size(rterm2wterm(RTERM, BASE)) #define hashmap_make_hash(Key) make_hash2(Key) #define hashmap_restore_hash(Heap,Lvl,Key) \ (((Lvl) < 8) ? hashmap_make_hash(Key) >> (4*(Lvl)) : hashmap_make_hash(CONS(Heap, make_small((Lvl)>>3), (Key))) >> (4*((Lvl) & 7))) #define hashmap_shift_hash(Heap,Hx,Lvl,Key) \ (((++(Lvl)) & 7) ? (Hx) >> 4 : hashmap_make_hash(CONS(Heap, make_small((Lvl)>>3), Key))) /* erl_term.h stuff */ #define make_map(x) make_boxed((Eterm*)(x)) #define make_map_rel(x, BASE) make_boxed_rel((Eterm*)(x),(BASE)) #define is_map(x) (is_boxed((x)) && is_map_header(*boxed_val((x)))) #define is_map_rel(RTERM,BASE) is_map(rterm2wterm(RTERM,BASE)) #define is_not_map(x) (!is_map((x))) #define is_map_header(x) (((x) & (_TAG_HEADER_MASK)) == _TAG_HEADER_MAP) #define header_is_map(x) ((((x) & (_HEADER_SUBTAG_MASK)) == MAP_SUBTAG)) #define map_val(x) (_unchecked_boxed_val((x))) #define map_val_rel(RTERM, BASE) map_val(rterm2wterm(RTERM, BASE)) #define map_get_values(x) (((Eterm *)(x)) + 3) #define map_get_keys(x) (((Eterm *)tuple_val(((map_t *)(x))->keys)) + 1) #define map_get_size(x) (((map_t*)(x))->size) #define MAP_SMALL_MAP_LIMIT (32) #define MAP_HEADER _make_header(1,_TAG_HEADER_MAP) #define MAP_HEADER_SIZE (sizeof(map_t) / sizeof(Eterm)) struct ErtsWStack_; struct ErtsEStack_; Eterm erts_maps_put(Process *p, Eterm key, Eterm value, Eterm map); int erts_maps_update(Process *p, Eterm key, Eterm value, Eterm map, Eterm *res); int erts_maps_remove(Process *p, Eterm key, Eterm map, Eterm *res); Eterm erts_hashmap_insert(Process *p, Uint32 hx, Eterm key, Eterm value, Eterm node, int is_update); int erts_hashmap_insert_down(Uint32 hx, Eterm key, Eterm node, Uint *sz, Uint *upsz, struct ErtsEStack_ *sp, int is_update); Eterm erts_hashmap_insert_up(Eterm *hp, Eterm key, Eterm value, Uint *upsz, struct ErtsEStack_ *sp); int erts_validate_and_sort_map(map_t* map); void hashmap_iterator_init(struct ErtsWStack_* s, Eterm node); Eterm* hashmap_iterator_next(struct ErtsWStack_* s); int hashmap_key_hash_cmp(Eterm* ap, Eterm* bp); Eterm erts_hashmap_from_array(Process *p, Eterm *leafs, Uint n); const Eterm *erts_hashmap_get(Uint32 hx, Eterm key, Eterm map); #if HALFWORD_HEAP const Eterm * erts_maps_get_rel(Eterm key, Eterm map, Eterm *map_base); # define erts_maps_get(A, B) erts_maps_get_rel(A, B, NULL) #else const Eterm * erts_maps_get(Eterm key, Eterm map); # define erts_maps_get_rel(A, B, B_BASE) erts_maps_get(A, B) #endif /* hamt nodes v2.0 * * node :: leaf | array | bitmap * head */ typedef struct hashmap_head_s { Eterm thing_word; Uint size; Eterm items[1]; } hashmap_head_t; /* thing_word tagscheme * Need two bits for map subtags * * Original HEADER representation: * * aaaaaaaaaaaaaaaa aaaaaaaaaatttt00 arity:26, tag:4 * * For maps we have: * * vvvvvvvvvvvvvvvv aaaaaaaamm111100 val:16, arity:8, mtype:2 * * unsure about trailing zeros * * map-tag: * 00 - flat map tag (non-hamt) -> val:16 = #items * 01 - map-node bitmap tag -> val:16 = bitmap * 10 - map-head (array-node) -> val:16 = 0xffff * 11 - map-head (bitmap-node) -> val:16 = bitmap */ /* erl_map.h stuff */ #define is_hashmap_header_head(x) ((MAP_HEADER_TYPE(x) & (0x2))) #define MAKE_MAP_HEADER(Type,Arity,Val) \ (_make_header(((((Uint16)(Val)) << MAP_HEADER_ARITY_SZ) | (Arity)) << MAP_HEADER_TAG_SZ | (Type) , _TAG_HEADER_HASHMAP)) #define MAP_HEADER_HAMT_HEAD_ARRAY \ MAKE_MAP_HEADER(MAP_HEADER_TAG_HAMT_HEAD_ARRAY,0x1,0xffff) #define MAP_HEADER_HAMT_HEAD_BITMAP(Bmp) \ MAKE_MAP_HEADER(MAP_HEADER_TAG_HAMT_HEAD_BITMAP,0x1,Bmp) #define MAP_HEADER_HAMT_NODE_ARRAY \ make_arityval(16) #define MAP_HEADER_HAMT_NODE_BITMAP(Bmp) \ MAKE_MAP_HEADER(MAP_HEADER_TAG_HAMT_NODE_BITMAP,0x0,Bmp) #define HAMT_HEAD_EMPTY_SZ (2) #define HAMT_NODE_ARRAY_SZ (17) #define HAMT_HEAD_ARRAY_SZ (18) #define HAMT_NODE_BITMAP_SZ(n) (1 + n) #define HAMT_HEAD_BITMAP_SZ(n) (2 + n) #define _HEADER_MAP_SUBTAG_MASK (0xfc) /* 2 bits maps tag + 4 bits subtag + 2 ignore bits */ /* SUBTAG_NODE_ARRAY is in fact a tuple with 16 elements */ #define HAMT_SUBTAG_NODE_ARRAY (((16 << _HEADER_ARITY_OFFS) | ARITYVAL_SUBTAG) & _HEADER_MAP_SUBTAG_MASK) #define HAMT_SUBTAG_NODE_BITMAP ((MAP_HEADER_TAG_HAMT_NODE_BITMAP << _HEADER_ARITY_OFFS) | HASHMAP_SUBTAG) #define HAMT_SUBTAG_HEAD_ARRAY ((MAP_HEADER_TAG_HAMT_HEAD_ARRAY << _HEADER_ARITY_OFFS) | HASHMAP_SUBTAG) #define HAMT_SUBTAG_HEAD_BITMAP ((MAP_HEADER_TAG_HAMT_HEAD_BITMAP << _HEADER_ARITY_OFFS) | HASHMAP_SUBTAG) #define hashmap_index(hash) (((Uint32)hash) & 0xf) #endif