1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* %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_internal_hash(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);
#define erts_hashmap_from_ks_and_vs(P, KS, VS, N) \
erts_hashmap_from_ks_and_vs_extra((P), (KS), (VS), (N), THE_NON_VALUE, THE_NON_VALUE);
Eterm erts_hashmap_from_ks_and_vs_extra(Process *p, Eterm *ks, Eterm *vs, Uint n,
Eterm k, Eterm v);
#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
|
