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author | Björn-Egil Dahlberg <egil@erlang.org> | 2015-02-24 14:17:51 +0100 |
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committer | Björn-Egil Dahlberg <egil@erlang.org> | 2015-03-12 19:15:27 +0100 |
commit | 1d2c8a4280e0eb5d7182986862f20045bc3ed6f8 (patch) | |
tree | a6cfccab5544c57fc32daa5a0cf9ae6101fd39b0 /erts/emulator/beam | |
parent | 8c9341288af6b66f0fd5caf229c87af29c59e711 (diff) | |
download | otp-1d2c8a4280e0eb5d7182986862f20045bc3ed6f8.tar.gz otp-1d2c8a4280e0eb5d7182986862f20045bc3ed6f8.tar.bz2 otp-1d2c8a4280e0eb5d7182986862f20045bc3ed6f8.zip |
erts: Refactor maps:update/3 and maps:put/3
Diffstat (limited to 'erts/emulator/beam')
-rw-r--r-- | erts/emulator/beam/erl_map.c | 368 |
1 files changed, 206 insertions, 162 deletions
diff --git a/erts/emulator/beam/erl_map.c b/erts/emulator/beam/erl_map.c index 3e1092bfbe..8c44f45125 100644 --- a/erts/emulator/beam/erl_map.c +++ b/erts/emulator/beam/erl_map.c @@ -486,122 +486,11 @@ BIF_RETTYPE maps_new_0(BIF_ALIST_0) { BIF_RET(make_map(mp)); } -/* maps:put/3 - */ - -Eterm erts_maps_put(Process *p, Eterm key, Eterm value, Eterm map) { - Sint n,i; - Sint c = 0; - Eterm* hp, *shp; - Eterm *ks,*vs, res, tup; - map_t *mp = (map_t*)map_val(map); - - n = map_get_size(mp); - - if (n == 0) { - hp = HAlloc(p, MAP_HEADER_SIZE + 1 + 2); - tup = make_tuple(hp); - *hp++ = make_arityval(1); - *hp++ = key; - res = make_map(hp); - *hp++ = MAP_HEADER; - *hp++ = 1; - *hp++ = tup; - *hp++ = value; - - return res; - } - - ks = map_get_keys(mp); - vs = map_get_values(mp); - - /* only allocate for values, - * assume key-tuple will be intact - */ - - hp = HAlloc(p, MAP_HEADER_SIZE + n); - shp = hp; /* save hp, used if optimistic update fails */ - res = make_map(hp); - *hp++ = MAP_HEADER; - *hp++ = n; - *hp++ = mp->keys; - - if (is_immed(key)) { - for( i = 0; i < n; i ++) { - if (ks[i] == key) { - *hp++ = value; - vs++; - c = 1; - } else { - *hp++ = *vs++; - } - } - } else { - for( i = 0; i < n; i ++) { - if (EQ(ks[i], key)) { - *hp++ = value; - vs++; - c = 1; - } else { - *hp++ = *vs++; - } - } - } - - if (c) - return res; - - /* need to make a new tuple, - * use old hp since it needs to be recreated anyway. - */ - tup = make_tuple(shp); - *shp++ = make_arityval(n+1); - - hp = HAlloc(p, 3 + n + 1); - res = make_map(hp); - *hp++ = MAP_HEADER; - *hp++ = n + 1; - *hp++ = tup; - - ks = map_get_keys(mp); - vs = map_get_values(mp); - - ASSERT(n >= 0); - - /* copy map in order */ - while (n && ((c = CMP_TERM(*ks, key)) < 0)) { - *shp++ = *ks++; - *hp++ = *vs++; - n--; - } - - *shp++ = key; - *hp++ = value; - - ASSERT(n >= 0); - - while(n--) { - *shp++ = *ks++; - *hp++ = *vs++; - } - /* we have one word remaining - * this will work out fine once we get the size word - * in the header. - */ - *shp = make_pos_bignum_header(0); - return res; -} +/* maps:put/3 */ BIF_RETTYPE maps_put_3(BIF_ALIST_3) { - if (is_map(BIF_ARG_3)) { + if (is_map(BIF_ARG_3) || is_hashmap(BIF_ARG_3)) { BIF_RET(erts_maps_put(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3)); - } else if (is_hashmap(BIF_ARG_3)) { - Uint32 hx = hashmap_make_hash(BIF_ARG_1); - Eterm map; - - map = hashmap_insert(BIF_P, hx, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, 0); - ASSERT(is_hashmap(map)); - BIF_RET(map); } BIF_ERROR(BIF_P, BADARG); } @@ -694,82 +583,237 @@ BIF_RETTYPE maps_remove_2(BIF_ALIST_2) { BIF_ERROR(BIF_P, BADARG); } -/* maps:update/3 - */ - int erts_maps_update(Process *p, Eterm key, Eterm value, Eterm map, Eterm *res) { - Sint n,i; - Eterm* hp,*shp; - Eterm *ks,*vs; - map_t *mp = (map_t*)map_val(map); + Uint32 hx; + if (is_map(map)) { + Sint n,i; + Eterm* hp,*shp; + Eterm *ks,*vs; + map_t *mp = (map_t*)map_val(map); + + if ((n = map_get_size(mp)) == 0) { + return 0; + } + + ks = map_get_keys(mp); + vs = map_get_values(mp); + + /* only allocate for values, + * assume key-tuple will be intact + */ + + hp = HAlloc(p, MAP_HEADER_SIZE + n); + shp = hp; + *hp++ = MAP_HEADER; + *hp++ = n; + *hp++ = mp->keys; + + if (is_immed(key)) { + for( i = 0; i < n; i ++) { + if (ks[i] == key) { + goto found_key; + } else { + *hp++ = *vs++; + } + } + } else { + for( i = 0; i < n; i ++) { + if (EQ(ks[i], key)) { + goto found_key; + } else { + *hp++ = *vs++; + } + } + } - if ((n = map_get_size(mp)) == 0) { + HRelease(p, shp + MAP_HEADER_SIZE + n, shp); return 0; + +found_key: + *hp++ = value; + vs++; + if (++i < n) + sys_memcpy(hp, vs, (n - i)*sizeof(Eterm)); + *res = make_map(shp); + return 1; } - ks = map_get_keys(mp); - vs = map_get_values(mp); + ASSERT(is_hashmap(map)); + hx = hashmap_make_hash(key); + *res = hashmap_insert(p, hx, key, value, map, 1); + if (is_value(*res)) + return 1; - /* only allocate for values, - * assume key-tuple will be intact - */ + return 0; +} - hp = HAlloc(p, MAP_HEADER_SIZE + n); - shp = hp; - *hp++ = MAP_HEADER; - *hp++ = n; - *hp++ = mp->keys; +Eterm erts_maps_put(Process *p, Eterm key, Eterm value, Eterm map) { + Uint32 hx; + Eterm res; + if (is_map(map)) { + Sint n,i; + Sint c = 0; + Eterm* hp, *shp; + Eterm *ks, *vs, tup; + map_t *mp = (map_t*)map_val(map); - if (is_immed(key)) { - for( i = 0; i < n; i ++) { - if (ks[i] == key) { - goto found_key; - } else { - *hp++ = *vs++; + n = map_get_size(mp); + + if (n == 0) { + hp = HAlloc(p, MAP_HEADER_SIZE + 1 + 2); + tup = make_tuple(hp); + *hp++ = make_arityval(1); + *hp++ = key; + res = make_map(hp); + *hp++ = MAP_HEADER; + *hp++ = 1; + *hp++ = tup; + *hp++ = value; + + return res; + } + + ks = map_get_keys(mp); + vs = map_get_values(mp); + + /* only allocate for values, + * assume key-tuple will be intact + */ + + hp = HAlloc(p, MAP_HEADER_SIZE + n); + shp = hp; /* save hp, used if optimistic update fails */ + res = make_map(hp); + *hp++ = MAP_HEADER; + *hp++ = n; + *hp++ = mp->keys; + + if (is_immed(key)) { + for( i = 0; i < n; i ++) { + if (ks[i] == key) { + *hp++ = value; + vs++; + c = 1; + } else { + *hp++ = *vs++; + } + } + } else { + for( i = 0; i < n; i ++) { + if (EQ(ks[i], key)) { + *hp++ = value; + vs++; + c = 1; + } else { + *hp++ = *vs++; + } } } - } else { - for( i = 0; i < n; i ++) { - if (EQ(ks[i], key)) { - goto found_key; - } else { - *hp++ = *vs++; + + if (c) + return res; + + /* the map will grow */ + + if (n >= MAP_SMALL_MAP_LIMIT) { + hxnode_t *hxns; + Uint32 sw, hx; + Eterm tmp[2]; + + HRelease(p, shp + MAP_HEADER_SIZE + n, shp); + hp = HAlloc(p, (2 * (n + 1))); + ks = map_get_keys(mp); + vs = map_get_values(mp); + + /* create tmp hx values and leaf ptrs */ + hxns = (hxnode_t *)erts_alloc(ERTS_ALC_T_TMP, (n + 1) * sizeof(hxnode_t)); + + for (i = 0; i < n; i++) { + hx = hashmap_restore_hash(tmp,0,ks[i]); + swizzle32(sw,hx); + hxns[i].hx = sw; + hxns[i].val = CONS(hp, ks[i], vs[i]); hp += 2; + hxns[i].skip = 1; + hxns[i].i = i; } + + hx = hashmap_restore_hash(tmp,0,key); + swizzle32(sw,hx); + hxns[i].hx = sw; + hxns[i].val = CONS(hp, key, value); hp += 2; + hxns[i].skip = 1; + hxns[i].i = n; + + res = hashmap_from_unsorted_array(p, hxns, n + 1); + + erts_free(ERTS_ALC_T_TMP, (void *) hxns); + ERTS_VERIFY_UNUSED_TEMP_ALLOC(p); + + return res; + } + + /* still a small map. need to make a new tuple, + * use old hp since it needs to be recreated anyway. */ + + tup = make_tuple(shp); + *shp++ = make_arityval(n+1); + + hp = HAlloc(p, 3 + n + 1); + res = make_map(hp); + *hp++ = MAP_HEADER; + *hp++ = n + 1; + *hp++ = tup; + + ks = map_get_keys(mp); + vs = map_get_values(mp); + + ASSERT(n >= 0); + + /* copy map in order */ + while (n && ((c = CMP_TERM(*ks, key)) < 0)) { + *shp++ = *ks++; + *hp++ = *vs++; + n--; } + + *shp++ = key; + *hp++ = value; + + ASSERT(n >= 0); + + while(n--) { + *shp++ = *ks++; + *hp++ = *vs++; + } + /* we have one word remaining + * this will work out fine once we get the size word + * in the header. + */ + *shp = make_pos_bignum_header(0); + return res; } + ASSERT(is_hashmap(map)); - HRelease(p, shp + MAP_HEADER_SIZE + n, shp); - return 0; + hx = hashmap_make_hash(key); + res = hashmap_insert(p, hx, key, value, map, 0); + ASSERT(is_hashmap(res)); -found_key: - *hp++ = value; - vs++; - if (++i < n) - sys_memcpy(hp, vs, (n - i)*sizeof(Eterm)); - *res = make_map(shp); - return 1; + return res; } +/* maps:update/3 */ + BIF_RETTYPE maps_update_3(BIF_ALIST_3) { - if (is_map(BIF_ARG_3)) { + if (is_map(BIF_ARG_3) || is_hashmap(BIF_ARG_3)) { Eterm res; if (erts_maps_update(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, &res)) { BIF_RET(res); } - } else if (is_hashmap(BIF_ARG_3)) { - Uint32 hx = hashmap_make_hash(BIF_ARG_1); - Eterm map; - - map = hashmap_insert(BIF_P, hx, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, 1); - if (is_value(map)) - BIF_RET(map); } BIF_ERROR(BIF_P, BADARG); } -/* maps:values/1 - */ +/* maps:values/1 */ BIF_RETTYPE maps_values_1(BIF_ALIST_1) { if (is_map(BIF_ARG_1)) { |