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-rw-r--r--src/ptr_map.cpp175
1 files changed, 94 insertions, 81 deletions
diff --git a/src/ptr_map.cpp b/src/ptr_map.cpp
index 598904906..0a5c1e492 100644
--- a/src/ptr_map.cpp
+++ b/src/ptr_map.cpp
@@ -2,6 +2,13 @@
typedef u32 MapIndex;
+enum {
+ MAP_CACHE_LINE_SIZE_POW = 6,
+ MAP_CACHE_LINE_SIZE = 1<<MAP_CACHE_LINE_SIZE_POW,
+ MAP_CACHE_LINE_MASK = MAP_CACHE_LINE_SIZE-1,
+};
+
+
struct MapFindResult {
MapIndex hash_index;
MapIndex entry_prev;
@@ -21,8 +28,11 @@ struct PtrMapEntry {
template <typename K, typename V>
struct PtrMap {
- Slice<MapIndex> hashes;
- Array<PtrMapEntry<K, V> > entries;
+ MapIndex * hashes;
+ usize hashes_count;
+ PtrMapEntry<K, V> *entries;
+ u32 count;
+ u32 entries_capacity;
};
@@ -78,42 +88,48 @@ gb_internal gbAllocator map_allocator(void) {
template <typename K, typename V>
gb_internal gb_inline void map_init(PtrMap<K, V> *h, isize capacity) {
capacity = next_pow2_isize(capacity);
- slice_init(&h->hashes, map_allocator(), capacity);
- array_init(&h->entries, map_allocator(), 0, capacity);
- for (isize i = 0; i < capacity; i++) {
- h->hashes.data[i] = MAP_SENTINEL;
- }
+ map_reserve(h, capacity);
}
template <typename K, typename V>
gb_internal gb_inline void map_destroy(PtrMap<K, V> *h) {
- if (h->entries.allocator.proc == nullptr) {
- h->entries.allocator = map_allocator();
- }
- slice_free(&h->hashes, h->entries.allocator);
- array_free(&h->entries);
+ gbAllocator a = map_allocator();
+ gb_free(a, h->hashes);
+ gb_free(a, h->entries);
}
template <typename K, typename V>
+gb_internal void map__resize_hashes(PtrMap<K, V> *h, usize count) {
+ h->hashes_count = cast(u32)resize_array_raw(&h->hashes, string_map_allocator(), h->hashes_count, count, MAP_CACHE_LINE_SIZE);
+}
+
+template <typename K, typename V>
+gb_internal void map__reserve_entries(PtrMap<K, V> *h, usize capacity) {
+ h->entries_capacity = cast(u32)resize_array_raw(&h->entries, string_map_allocator(), h->entries_capacity, capacity, MAP_CACHE_LINE_SIZE);
+}
+
+
+template <typename K, typename V>
gb_internal MapIndex map__add_entry(PtrMap<K, V> *h, K key) {
PtrMapEntry<K, V> e = {};
e.key = key;
e.next = MAP_SENTINEL;
- array_add(&h->entries, e);
- return cast(MapIndex)(h->entries.count-1);
+ map__reserve_entries(h, h->count+1);
+ h->entries[h->count++] = e;
+ return cast(MapIndex)(h->count-1);
}
template <typename K, typename V>
gb_internal MapFindResult map__find(PtrMap<K, V> *h, K key) {
MapFindResult fr = {MAP_SENTINEL, MAP_SENTINEL, MAP_SENTINEL};
- if (h->hashes.count == 0) {
+ if (h->hashes_count == 0) {
return fr;
}
u32 hash = ptr_map_hash_key(key);
- fr.hash_index = cast(MapIndex)(hash & (h->hashes.count-1));
- fr.entry_index = h->hashes.data[fr.hash_index];
+ fr.hash_index = cast(MapIndex)(hash & (h->hashes_count-1));
+ fr.entry_index = h->hashes[fr.hash_index];
while (fr.entry_index != MAP_SENTINEL) {
- auto *entry = &h->entries.data[fr.entry_index];
+ auto *entry = &h->entries[fr.entry_index];
if (entry->key == key) {
return fr;
}
@@ -126,41 +142,41 @@ gb_internal MapFindResult map__find(PtrMap<K, V> *h, K key) {
template <typename K, typename V>
gb_internal MapFindResult map__find_from_entry(PtrMap<K, V> *h, PtrMapEntry<K, V> *e) {
MapFindResult fr = {MAP_SENTINEL, MAP_SENTINEL, MAP_SENTINEL};
- if (h->hashes.count == 0) {
+ if (h->hashes_count == 0) {
return fr;
}
u32 hash = ptr_map_hash_key(e->key);
- fr.hash_index = cast(MapIndex)(hash & (h->hashes.count-1));
- fr.entry_index = h->hashes.data[fr.hash_index];
+ fr.hash_index = cast(MapIndex)(hash & (h->hashes_count-1));
+ fr.entry_index = h->hashes[fr.hash_index];
while (fr.entry_index != MAP_SENTINEL) {
- if (&h->entries.data[fr.entry_index] == e) {
+ if (&h->entries[fr.entry_index] == e) {
return fr;
}
fr.entry_prev = fr.entry_index;
- fr.entry_index = h->entries.data[fr.entry_index].next;
+ fr.entry_index = h->entries[fr.entry_index].next;
}
return fr;
}
template <typename K, typename V>
gb_internal b32 map__full(PtrMap<K, V> *h) {
- return 0.75f * h->hashes.count <= h->entries.count;
+ return 0.75f * h->hashes_count <= h->count;
}
template <typename K, typename V>
gb_internal gb_inline void map_grow(PtrMap<K, V> *h) {
- isize new_count = gb_max(h->hashes.count<<1, 16);
+ isize new_count = gb_max(h->hashes_count<<1, 16);
map_rehash(h, new_count);
}
template <typename K, typename V>
gb_internal void map_reset_entries(PtrMap<K, V> *h) {
- for (isize i = 0; i < h->hashes.count; i++) {
- h->hashes.data[i] = MAP_SENTINEL;
+ for (usize i = 0; i < h->hashes_count; i++) {
+ h->hashes[i] = MAP_SENTINEL;
}
- for (isize i = 0; i < h->entries.count; i++) {
+ for (usize i = 0; i < h->count; i++) {
MapFindResult fr;
- PtrMapEntry<K, V> *e = &h->entries.data[i];
+ PtrMapEntry<K, V> *e = &h->entries[i];
e->next = MAP_SENTINEL;
fr = map__find_from_entry(h, e);
if (fr.entry_prev == MAP_SENTINEL) {
@@ -173,14 +189,11 @@ gb_internal void map_reset_entries(PtrMap<K, V> *h) {
template <typename K, typename V>
gb_internal void map_reserve(PtrMap<K, V> *h, isize cap) {
- if (h->entries.allocator.proc == nullptr) {
- h->entries.allocator = map_allocator();
- }
- array_reserve(&h->entries, cap);
- if (h->entries.count*2 < h->hashes.count) {
+ if (h->count*2 < h->hashes_count) {
return;
}
- slice_resize(&h->hashes, h->entries.allocator, cap*2);
+ map__reserve_entries(h, cap);
+ map__resize_hashes(h, cap*2);
map_reset_entries(h);
}
@@ -195,12 +208,12 @@ gb_internal V *map_get(PtrMap<K, V> *h, K key) {
MapIndex hash_index = MAP_SENTINEL;
MapIndex entry_prev = MAP_SENTINEL;
MapIndex entry_index = MAP_SENTINEL;
- if (h->hashes.count != 0) {
+ if (h->hashes_count != 0) {
u32 hash = ptr_map_hash_key(key);
- hash_index = cast(MapIndex)(hash & (h->hashes.count-1));
- entry_index = h->hashes.data[hash_index];
+ hash_index = cast(MapIndex)(hash & (h->hashes_count-1));
+ entry_index = h->hashes[hash_index];
while (entry_index != MAP_SENTINEL) {
- auto *entry = &h->entries.data[entry_index];
+ auto *entry = &h->entries[entry_index];
if (entry->key == key) {
return &entry->value;
}
@@ -213,12 +226,12 @@ gb_internal V *map_get(PtrMap<K, V> *h, K key) {
template <typename K, typename V>
gb_internal V *map_try_get(PtrMap<K, V> *h, K key, MapFindResult *fr_) {
MapFindResult fr = {MAP_SENTINEL, MAP_SENTINEL, MAP_SENTINEL};
- if (h->hashes.count != 0) {
+ if (h->hashes_count != 0) {
u32 hash = ptr_map_hash_key(key);
- fr.hash_index = cast(MapIndex)(hash & (h->hashes.count-1));
- fr.entry_index = h->hashes.data[fr.hash_index];
+ fr.hash_index = cast(MapIndex)(hash & (h->hashes_count-1));
+ fr.entry_index = h->hashes[fr.hash_index];
while (fr.entry_index != MAP_SENTINEL) {
- auto *entry = &h->entries.data[fr.entry_index];
+ auto *entry = &h->entries[fr.entry_index];
if (entry->key == key) {
return &entry->value;
}
@@ -226,7 +239,7 @@ gb_internal V *map_try_get(PtrMap<K, V> *h, K key, MapFindResult *fr_) {
fr.entry_index = entry->next;
}
}
- if (h->hashes.count == 0 || map__full(h)) {
+ if (h->hashes_count == 0 || map__full(h)) {
map_grow(h);
}
if (fr_) *fr_ = fr;
@@ -238,11 +251,11 @@ template <typename K, typename V>
gb_internal void map_set_internal_from_try_get(PtrMap<K, V> *h, K key, V const &value, MapFindResult const &fr) {
MapIndex index = map__add_entry(h, key);
if (fr.entry_prev != MAP_SENTINEL) {
- h->entries.data[fr.entry_prev].next = index;
+ h->entries[fr.entry_prev].next = index;
} else {
- h->hashes.data[fr.hash_index] = index;
+ h->hashes[fr.hash_index] = index;
}
- h->entries.data[index].value = value;
+ h->entries[index].value = value;
}
template <typename K, typename V>
@@ -256,7 +269,7 @@ template <typename K, typename V>
gb_internal void map_set(PtrMap<K, V> *h, K key, V const &value) {
MapIndex index;
MapFindResult fr;
- if (h->hashes.count == 0) {
+ if (h->hashes_count == 0) {
map_grow(h);
}
fr = map__find(h, key);
@@ -265,12 +278,12 @@ gb_internal void map_set(PtrMap<K, V> *h, K key, V const &value) {
} else {
index = map__add_entry(h, key);
if (fr.entry_prev != MAP_SENTINEL) {
- h->entries.data[fr.entry_prev].next = index;
+ h->entries[fr.entry_prev].next = index;
} else {
- h->hashes.data[fr.hash_index] = index;
+ h->hashes[fr.hash_index] = index;
}
}
- h->entries.data[index].value = value;
+ h->entries[index].value = value;
if (map__full(h)) {
map_grow(h);
@@ -282,7 +295,7 @@ template <typename K, typename V>
gb_internal bool map_set_if_not_previously_exists(PtrMap<K, V> *h, K key, V const &value) {
MapIndex index;
MapFindResult fr;
- if (h->hashes.count == 0) {
+ if (h->hashes_count == 0) {
map_grow(h);
}
fr = map__find(h, key);
@@ -291,12 +304,12 @@ gb_internal bool map_set_if_not_previously_exists(PtrMap<K, V> *h, K key, V cons
} else {
index = map__add_entry(h, key);
if (fr.entry_prev != MAP_SENTINEL) {
- h->entries.data[fr.entry_prev].next = index;
+ h->entries[fr.entry_prev].next = index;
} else {
- h->hashes.data[fr.hash_index] = index;
+ h->hashes[fr.hash_index] = index;
}
}
- h->entries.data[index].value = value;
+ h->entries[index].value = value;
if (map__full(h)) {
map_grow(h);
@@ -309,22 +322,22 @@ template <typename K, typename V>
gb_internal void map__erase(PtrMap<K, V> *h, MapFindResult const &fr) {
MapFindResult last;
if (fr.entry_prev == MAP_SENTINEL) {
- h->hashes.data[fr.hash_index] = h->entries.data[fr.entry_index].next;
+ h->hashes[fr.hash_index] = h->entries[fr.entry_index].next;
} else {
- h->entries.data[fr.entry_prev].next = h->entries.data[fr.entry_index].next;
+ h->entries[fr.entry_prev].next = h->entries[fr.entry_index].next;
}
- if (fr.entry_index == h->entries.count-1) {
- array_pop(&h->entries);
+ if (fr.entry_index == h->count-1) {
+ h->count--;
return;
}
- h->entries.data[fr.entry_index] = h->entries.data[h->entries.count-1];
- array_pop(&h->entries);
+ h->entries[fr.entry_index] = h->entries[h->count-1];
+ h->count--;
- last = map__find(h, h->entries.data[fr.entry_index].key);
+ last = map__find(h, h->entries[fr.entry_index].key);
if (last.entry_prev != MAP_SENTINEL) {
- h->entries.data[last.entry_prev].next = fr.entry_index;
+ h->entries[last.entry_prev].next = fr.entry_index;
} else {
- h->hashes.data[last.hash_index] = fr.entry_index;
+ h->hashes[last.hash_index] = fr.entry_index;
}
}
@@ -338,9 +351,9 @@ gb_internal void map_remove(PtrMap<K, V> *h, K key) {
template <typename K, typename V>
gb_internal gb_inline void map_clear(PtrMap<K, V> *h) {
- array_clear(&h->entries);
- for (isize i = 0; i < h->hashes.count; i++) {
- h->hashes.data[i] = MAP_SENTINEL;
+ h->count = 0;
+ for (usize i = 0; i < h->hashes_count; i++) {
+ h->hashes[i] = MAP_SENTINEL;
}
}
@@ -352,17 +365,17 @@ gb_internal PtrMapEntry<K, V> *multi_map_find_first(PtrMap<K, V> *h, K key) {
if (i == MAP_SENTINEL) {
return nullptr;
}
- return &h->entries.data[i];
+ return &h->entries[i];
}
template <typename K, typename V>
gb_internal PtrMapEntry<K, V> *multi_map_find_next(PtrMap<K, V> *h, PtrMapEntry<K, V> *e) {
MapIndex i = e->next;
while (i != MAP_SENTINEL) {
- if (h->entries.data[i].key == e->key) {
- return &h->entries.data[i];
+ if (h->entries[i].key == e->key) {
+ return &h->entries[i];
}
- i = h->entries.data[i].next;
+ i = h->entries[i].next;
}
return nullptr;
}
@@ -380,7 +393,7 @@ gb_internal isize multi_map_count(PtrMap<K, V> *h, K key) {
template <typename K, typename V>
gb_internal void multi_map_get_all(PtrMap<K, V> *h, K key, V *items) {
- isize i = 0;
+ usize i = 0;
PtrMapEntry<K, V> *e = multi_map_find_first(h, key);
while (e != nullptr) {
items[i++] = e->value;
@@ -392,19 +405,19 @@ template <typename K, typename V>
gb_internal void multi_map_insert(PtrMap<K, V> *h, K key, V const &value) {
MapFindResult fr;
MapIndex i;
- if (h->hashes.count == 0) {
+ if (h->hashes_count == 0) {
map_grow(h);
}
// Make
fr = map__find(h, key);
i = map__add_entry(h, key);
if (fr.entry_prev == MAP_SENTINEL) {
- h->hashes.data[fr.hash_index] = i;
+ h->hashes[fr.hash_index] = i;
} else {
- h->entries.data[fr.entry_prev].next = i;
+ h->entries[fr.entry_prev].next = i;
}
- h->entries.data[i].next = fr.entry_index;
- h->entries.data[i].value = value;
+ h->entries[i].next = fr.entry_index;
+ h->entries[i].value = value;
// Grow if needed
if (map__full(h)) {
map_grow(h);
@@ -430,20 +443,20 @@ gb_internal void multi_map_remove_all(PtrMap<K, V> *h, K key) {
template <typename K, typename V>
gb_internal PtrMapEntry<K, V> *begin(PtrMap<K, V> &m) {
- return m.entries.data;
+ return m.entries;
}
template <typename K, typename V>
gb_internal PtrMapEntry<K, V> const *begin(PtrMap<K, V> const &m) {
- return m.entries.data;
+ return m.entries;
}
template <typename K, typename V>
gb_internal PtrMapEntry<K, V> *end(PtrMap<K, V> &m) {
- return m.entries.data + m.entries.count;
+ return m.entries + m.count;
}
template <typename K, typename V>
gb_internal PtrMapEntry<K, V> const *end(PtrMap<K, V> const &m) {
- return m.entries.data + m.entries.count;
+ return m.entries + m.count;
}
generated by cgit v1.2.3 (git 2.39.1) at 2026-02-15 08:29:12 +0000