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Improve performance of the compiler hash table types and unify behaviour

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This commit is contained in:
gingerBill
2021-11-05 12:42:19 +00:00
parent 0010e882a7
commit 439fc86740
3 changed files with 155 additions and 120 deletions
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104
src/string_map.cpp
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@@ -1,10 +1,16 @@
// NOTE(bill): This util stuff is the same for every `Map`
typedef isize StringMapIndex;
struct StringMapFindResult {
isize hash_index;
isize entry_prev;
isize entry_index;
StringMapIndex hash_index;
StringMapIndex entry_prev;
StringMapIndex entry_index;
};
enum : StringMapIndex { STRING_MAP_SENTINEL = ~(StringMapIndex)0 };
struct StringHashKey {
u64 hash;
String string;
@@ -65,6 +71,7 @@ template <typename T> void string_map_remove (StringMap<T> *h, StringH
template <typename T> void string_map_clear (StringMap<T> *h);
template <typename T> void string_map_grow (StringMap<T> *h);
template <typename T> void string_map_rehash (StringMap<T> *h, isize new_count);
template <typename T> void string_map_reserve (StringMap<T> *h, isize cap);
template <typename T>
gb_inline void string_map_init(StringMap<T> *h, gbAllocator a, isize capacity) {
@@ -72,7 +79,7 @@ gb_inline void string_map_init(StringMap<T> *h, gbAllocator a, isize capacity) {
slice_init(&h->hashes, a, capacity);
array_init(&h->entries, a, 0, capacity);
for (isize i = 0; i < capacity; i++) {
h->hashes.data[i] = -1;
h->hashes.data[i] = STRING_MAP_SENTINEL;
}
}
@@ -86,18 +93,18 @@ template <typename T>
gb_internal isize string_map__add_entry(StringMap<T> *h, StringHashKey const &key) {
StringMapEntry<T> e = {};
e.key = key;
e.next = -1;
e.next = STRING_MAP_SENTINEL;
array_add(&h->entries, e);
return h->entries.count-1;
}
template <typename T>
gb_internal StringMapFindResult string_map__find(StringMap<T> *h, StringHashKey const &key) {
StringMapFindResult fr = {-1, -1, -1};
StringMapFindResult fr = {STRING_MAP_SENTINEL, STRING_MAP_SENTINEL, STRING_MAP_SENTINEL};
if (h->hashes.count != 0) {
fr.hash_index = key.hash & (h->hashes.count-1);
fr.entry_index = h->hashes.data[fr.hash_index];
while (fr.entry_index >= 0) {
while (fr.entry_index != STRING_MAP_SENTINEL) {
if (string_hash_key_equal(h->entries.data[fr.entry_index].key, key)) {
return fr;
}
@@ -110,11 +117,11 @@ gb_internal StringMapFindResult string_map__find(StringMap<T> *h, StringHashKey
template <typename T>
gb_internal StringMapFindResult string_map__find_from_entry(StringMap<T> *h, StringMapEntry<T> *e) {
StringMapFindResult fr = {-1, -1, -1};
StringMapFindResult fr = {STRING_MAP_SENTINEL, STRING_MAP_SENTINEL, STRING_MAP_SENTINEL};
if (h->hashes.count != 0) {
fr.hash_index = e->key.hash & (h->hashes.count-1);
fr.entry_index = h->hashes.data[fr.hash_index];
while (fr.entry_index >= 0) {
while (fr.entry_index != STRING_MAP_SENTINEL) {
if (&h->entries.data[fr.entry_index] == e) {
return fr;
}
@@ -136,45 +143,46 @@ gb_inline void string_map_grow(StringMap<T> *h) {
string_map_rehash(h, new_count);
}
template <typename T>
void string_map_reset_entries(StringMap<T> *h) {
isize i;
for (i = 0; i < h->hashes.count; i++) {
h->hashes.data[i] = STRING_MAP_SENTINEL;
}
for (i = 0; i < h->entries.count; i++) {
StringMapFindResult fr;
StringMapEntry<T> *e = &h->entries.data[i];
e->next = STRING_MAP_SENTINEL;
fr = string_map__find_from_entry(h, e);
if (fr.entry_prev == STRING_MAP_SENTINEL) {
h->hashes[fr.hash_index] = i;
} else {
h->entries[fr.entry_prev].next = i;
}
}
}
template <typename T>
void string_map_reserve(StringMap<T> *h, isize cap) {
array_reserve(&h->entries, cap);
if (h->entries.count*2 < h->hashes.count) {
return;
}
slice_resize(&h->hashes, h->entries.allocator, cap*2);
string_map_reset_entries(h);
}
template <typename T>
void string_map_rehash(StringMap<T> *h, isize new_count) {
isize i, j;
StringMap<T> nh = {};
new_count = next_pow2_isize(new_count);
nh.hashes = h->hashes;
nh.entries.allocator = h->entries.allocator;
slice_resize(&nh.hashes, h->entries.allocator, new_count);
for (i = 0; i < new_count; i++) {
nh.hashes.data[i] = -1;
}
array_reserve(&nh.entries, ARRAY_GROW_FORMULA(h->entries.count));
for (i = 0; i < h->entries.count; i++) {
StringMapEntry<T> *e = &h->entries.data[i];
StringMapFindResult fr;
if (nh.hashes.count == 0) {
string_map_grow(&nh);
}
fr = string_map__find(&nh, e->key);
j = string_map__add_entry(&nh, e->key);
if (fr.entry_prev < 0) {
nh.hashes.data[fr.hash_index] = j;
} else {
nh.entries.data[fr.entry_prev].next = j;
}
nh.entries.data[j].next = fr.entry_index;
nh.entries.data[j].value = e->value;
if (string_map__full(&nh)) {
string_map_grow(&nh);
}
}
array_free(&h->entries);
*h = nh;
string_map_reserve(h, new_count);
}
template <typename T>
T *string_map_get(StringMap<T> *h, StringHashKey const &key) {
isize index = string_map__find(h, key).entry_index;
if (index >= 0) {
if (index != STRING_MAP_SENTINEL) {
return &h->entries.data[index].value;
}
return nullptr;
@@ -193,7 +201,7 @@ gb_inline T *string_map_get(StringMap<T> *h, char const *key) {
template <typename T>
T &string_map_must_get(StringMap<T> *h, StringHashKey const &key) {
isize index = string_map__find(h, key).entry_index;
GB_ASSERT(index >= 0);
GB_ASSERT(index != STRING_MAP_SENTINEL);
return h->entries.data[index].value;
}
@@ -215,11 +223,11 @@ void string_map_set(StringMap<T> *h, StringHashKey const &key, T const &value) {
string_map_grow(h);
}
fr = string_map__find(h, key);
if (fr.entry_index >= 0) {
if (fr.entry_index != STRING_MAP_SENTINEL) {
index = fr.entry_index;
} else {
index = string_map__add_entry(h, key);
if (fr.entry_prev >= 0) {
if (fr.entry_prev != STRING_MAP_SENTINEL) {
h->entries.data[fr.entry_prev].next = index;
} else {
h->hashes.data[fr.hash_index] = index;
@@ -246,7 +254,7 @@ gb_inline void string_map_set(StringMap<T> *h, char const *key, T const &value)
template <typename T>
void string_map__erase(StringMap<T> *h, StringMapFindResult const &fr) {
StringMapFindResult last;
if (fr.entry_prev < 0) {
if (fr.entry_prev == STRING_MAP_SENTINEL) {
h->hashes.data[fr.hash_index] = h->entries.data[fr.entry_index].next;
} else {
h->entries.data[fr.entry_prev].next = h->entries.data[fr.entry_index].next;
@@ -257,7 +265,7 @@ void string_map__erase(StringMap<T> *h, StringMapFindResult const &fr) {
}
h->entries.data[fr.entry_index] = h->entries.data[h->entries.count-1];
last = string_map__find(h, h->entries.data[fr.entry_index].key);
if (last.entry_prev >= 0) {
if (last.entry_prev != STRING_MAP_SENTINEL) {
h->entries.data[last.entry_prev].next = fr.entry_index;
} else {
h->hashes.data[last.hash_index] = fr.entry_index;
@@ -267,7 +275,7 @@ void string_map__erase(StringMap<T> *h, StringMapFindResult const &fr) {
template <typename T>
void string_map_remove(StringMap<T> *h, StringHashKey const &key) {
StringMapFindResult fr = string_map__find(h, key);
if (fr.entry_index >= 0) {
if (fr.entry_index != STRING_MAP_SENTINEL) {
string_map__erase(h, fr);
}
}
@@ -276,7 +284,7 @@ template <typename T>
gb_inline void string_map_clear(StringMap<T> *h) {
array_clear(&h->entries);
for (isize i = 0; i < h->hashes.count; i++) {
h->hashes.data[i] = -1;
h->hashes.data[i] = STRING_MAP_SENTINEL;
}
}