[igt-dev] [PATCH i-g-t v30 03/39] lib/igt_map: Adopt Mesa hash table
Zbigniew Kempczyński
zbigniew.kempczynski at intel.com
Fri Apr 2 09:38:08 UTC 2021
From: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
The _search function has been changed to return a pointer to
the stored data instead of the entry struct. The _search_entry function,
which acts as the original search has been added. Additionally _remove function
has an optional delete_function param, to make it more usable.
For more information, see:
http://cgit.freedesktop.org/~anholt/hash_table/tree/README
Signed-off-by: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
Cc: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Jason Ekstrand <jason at jlekstrand.net>
---
.../igt-gpu-tools/igt-gpu-tools-docs.xml | 1 +
lib/Makefile.sources | 2 +
lib/igt_map.c | 502 ++++++++++++++++++
lib/igt_map.h | 174 ++++++
lib/meson.build | 1 +
5 files changed, 680 insertions(+)
create mode 100644 lib/igt_map.c
create mode 100644 lib/igt_map.h
diff --git a/docs/reference/igt-gpu-tools/igt-gpu-tools-docs.xml b/docs/reference/igt-gpu-tools/igt-gpu-tools-docs.xml
index 9c9aa8f1d..bf5ac5428 100644
--- a/docs/reference/igt-gpu-tools/igt-gpu-tools-docs.xml
+++ b/docs/reference/igt-gpu-tools/igt-gpu-tools-docs.xml
@@ -33,6 +33,7 @@
<xi:include href="xml/igt_kmod.xml"/>
<xi:include href="xml/igt_kms.xml"/>
<xi:include href="xml/igt_list.xml"/>
+ <xi:include href="xml/igt_map.xml"/>
<xi:include href="xml/igt_pm.xml"/>
<xi:include href="xml/igt_primes.xml"/>
<xi:include href="xml/igt_rand.xml"/>
diff --git a/lib/Makefile.sources b/lib/Makefile.sources
index 4f6389f8a..84fd7b49c 100644
--- a/lib/Makefile.sources
+++ b/lib/Makefile.sources
@@ -48,6 +48,8 @@ lib_source_list = \
igt_infoframe.h \
igt_list.c \
igt_list.h \
+ igt_map.c \
+ igt_map.h \
igt_matrix.c \
igt_matrix.h \
igt_params.c \
diff --git a/lib/igt_map.c b/lib/igt_map.c
new file mode 100644
index 000000000..da8713a18
--- /dev/null
+++ b/lib/igt_map.c
@@ -0,0 +1,502 @@
+/*
+ * Copyright © 2009, 2021 Intel Corporation
+ * Copyright © 1988-2004 Keith Packard and Bart Massey.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the names of the authors
+ * or their institutions shall not be used in advertising or
+ * otherwise to promote the sale, use or other dealings in this
+ * Software without prior written authorization from the
+ * authors.
+ *
+ * Authors:
+ * Eric Anholt <eric at anholt.net>
+ * Keith Packard <keithp at keithp.com>
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+
+#include "igt_map.h"
+
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+
+/*
+ * From Knuth -- a good choice for hash/rehash values is p, p-2 where
+ * p and p-2 are both prime. These tables are sized to have an extra 10%
+ * free to avoid exponential performance degradation as the hash table fills
+ */
+
+static const uint32_t deleted_key_value;
+static const void *deleted_key = &deleted_key_value;
+
+static const struct {
+ uint32_t max_entries, size, rehash;
+} hash_sizes[] = {
+ { 2, 5, 3 },
+ { 4, 7, 5 },
+ { 8, 13, 11 },
+ { 16, 19, 17 },
+ { 32, 43, 41 },
+ { 64, 73, 71 },
+ { 128, 151, 149 },
+ { 256, 283, 281 },
+ { 512, 571, 569 },
+ { 1024, 1153, 1151 },
+ { 2048, 2269, 2267 },
+ { 4096, 4519, 4517 },
+ { 8192, 9013, 9011 },
+ { 16384, 18043, 18041 },
+ { 32768, 36109, 36107 },
+ { 65536, 72091, 72089 },
+ { 131072, 144409, 144407 },
+ { 262144, 288361, 288359 },
+ { 524288, 576883, 576881 },
+ { 1048576, 1153459, 1153457 },
+ { 2097152, 2307163, 2307161 },
+ { 4194304, 4613893, 4613891 },
+ { 8388608, 9227641, 9227639 },
+ { 16777216, 18455029, 18455027 },
+ { 33554432, 36911011, 36911009 },
+ { 67108864, 73819861, 73819859 },
+ { 134217728, 147639589, 147639587 },
+ { 268435456, 295279081, 295279079 },
+ { 536870912, 590559793, 590559791 },
+ { 1073741824, 1181116273, 1181116271},
+ { 2147483648ul, 2362232233ul, 2362232231ul}
+};
+
+static int
+entry_is_free(const struct igt_map_entry *entry)
+{
+ return entry->key == NULL;
+}
+
+static int
+entry_is_deleted(const struct igt_map_entry *entry)
+{
+ return entry->key == deleted_key;
+}
+
+static int
+entry_is_present(const struct igt_map_entry *entry)
+{
+ return entry->key != NULL && entry->key != deleted_key;
+}
+
+/**
+ * igt_map_create:
+ * @hash_function: function that maps key to 32b hash
+ * @key_equals_function: function that compares given hashes
+ *
+ * Function creates a map and initializes it with given @hash_function and
+ * @key_equals_function.
+ *
+ * Returns: pointer to just created map
+ */
+struct igt_map *
+igt_map_create(uint32_t (*hash_function)(const void *key),
+ int (*key_equals_function)(const void *a, const void *b))
+{
+ struct igt_map *map;
+
+ map = malloc(sizeof(*map));
+ if (map == NULL)
+ return NULL;
+
+ map->size_index = 0;
+ map->size = hash_sizes[map->size_index].size;
+ map->rehash = hash_sizes[map->size_index].rehash;
+ map->max_entries = hash_sizes[map->size_index].max_entries;
+ map->hash_function = hash_function;
+ map->key_equals_function = key_equals_function;
+ map->table = calloc(map->size, sizeof(*map->table));
+ map->entries = 0;
+ map->deleted_entries = 0;
+
+ if (map->table == NULL) {
+ free(map);
+ return NULL;
+ }
+
+ return map;
+}
+
+/**
+ * igt_map_destroy:
+ * @map: igt_map pointer
+ * @delete_function: function that frees data in igt_map_entry
+ *
+ * Frees the given hash table. If @delete_function is passed, it gets called
+ * on each entry present before freeing.
+ */
+void
+igt_map_destroy(struct igt_map *map,
+ void (*delete_function)(struct igt_map_entry *entry))
+{
+ if (!map)
+ return;
+
+ if (delete_function) {
+ struct igt_map_entry *entry;
+
+ igt_map_foreach(map, entry) {
+ delete_function(entry);
+ }
+ }
+ free(map->table);
+ free(map);
+}
+
+/**
+ * igt_map_search:
+ * @map: igt_map pointer
+ * @key: pointer to searched key
+ *
+ * Finds a map entry's data with the given @key.
+ *
+ * Returns: data pointer if the entry was found, %NULL otherwise.
+ * Note that it may be modified by the user.
+ */
+void *
+igt_map_search(struct igt_map *map, const void *key)
+{
+ uint32_t hash = map->hash_function(key);
+ struct igt_map_entry *entry;
+
+ entry = igt_map_search_pre_hashed(map, hash, key);
+ return entry ? entry->data : NULL;
+}
+
+/**
+ * igt_map_search_entry:
+ * @map: igt_map pointer
+ * @key: pointer to searched key
+ *
+ * Finds a map entry with the given @key.
+ *
+ * Returns: map entry or %NULL if no entry is found.
+ * Note that the data pointer may be modified by the user.
+ */
+struct igt_map_entry *
+igt_map_search_entry(struct igt_map *map, const void *key)
+{
+ uint32_t hash = map->hash_function(key);
+
+ return igt_map_search_pre_hashed(map, hash, key);
+}
+
+/**
+ * igt_map_search_pre_hashed:
+ * @map: igt_map pointer
+ * @hash: hash of @key
+ * @key: pointer to searched key
+ *
+ * Finds a map entry with the given @key and @hash of that key.
+ *
+ * Returns: map entry or %NULL if no entry is found.
+ * Note that the data pointer may be modified by the user.
+ */
+struct igt_map_entry *
+igt_map_search_pre_hashed(struct igt_map *map, uint32_t hash,
+ const void *key)
+{
+ uint32_t start_hash_address = hash % map->size;
+ uint32_t hash_address = start_hash_address;
+
+ do {
+ uint32_t double_hash;
+
+ struct igt_map_entry *entry = map->table + hash_address;
+
+ if (entry_is_free(entry)) {
+ return NULL;
+ } else if (entry_is_present(entry) && entry->hash == hash) {
+ if (map->key_equals_function(key, entry->key)) {
+ return entry;
+ }
+ }
+
+ double_hash = 1 + hash % map->rehash;
+
+ hash_address = (hash_address + double_hash) % map->size;
+ } while (hash_address != start_hash_address);
+
+ return NULL;
+}
+
+static void
+igt_map_rehash(struct igt_map *map, int new_size_index)
+{
+ struct igt_map old_map;
+ struct igt_map_entry *table, *entry;
+
+ if (new_size_index >= ARRAY_SIZE(hash_sizes))
+ return;
+
+ table = calloc(hash_sizes[new_size_index].size, sizeof(*map->table));
+ if (table == NULL)
+ return;
+
+ old_map = *map;
+
+ map->table = table;
+ map->size_index = new_size_index;
+ map->size = hash_sizes[map->size_index].size;
+ map->rehash = hash_sizes[map->size_index].rehash;
+ map->max_entries = hash_sizes[map->size_index].max_entries;
+ map->entries = 0;
+ map->deleted_entries = 0;
+
+ igt_map_foreach(&old_map, entry) {
+ igt_map_insert_pre_hashed(map, entry->hash,
+ entry->key, entry->data);
+ }
+
+ free(old_map.table);
+}
+
+/**
+ * igt_map_insert:
+ * @map: igt_map pointer
+ * @data: data to be store
+ * @key: pointer to searched key
+ *
+ * Inserts the @data indexed by given @key into the map. If the @map already
+ * contains an entry with the @key, it will be replaced. To avoid memory leaks,
+ * perform a search before inserting.
+ *
+ * Note that insertion may rearrange the table on a resize or rehash,
+ * so previously found hash entries are no longer valid after this function.
+ *
+ * Returns: pointer to just inserted entry
+ */
+struct igt_map_entry *
+igt_map_insert(struct igt_map *map, const void *key, void *data)
+{
+ uint32_t hash = map->hash_function(key);
+
+ /* Make sure nobody tries to add one of the magic values as a
+ * key. If you need to do so, either do so in a wrapper, or
+ * store keys with the magic values separately in the struct
+ * igt_map.
+ */
+ assert(key != NULL);
+
+ return igt_map_insert_pre_hashed(map, hash, key, data);
+}
+
+/**
+ * igt_map_insert_pre_hashed:
+ * @map: igt_map pointer
+ * @hash: hash of @key
+ * @data: data to be store
+ * @key: pointer to searched key
+ *
+ * Inserts the @data indexed by given @key and @hash of that @key into the map.
+ * If the @map already contains an entry with the @key, it will be replaced.
+ * To avoid memory leaks, perform a search before inserting.
+ *
+ * Note that insertion may rearrange the table on a resize or rehash,
+ * so previously found hash entries are no longer valid after this function.
+ *
+ * Returns: pointer to just inserted entry
+ */
+struct igt_map_entry *
+igt_map_insert_pre_hashed(struct igt_map *map, uint32_t hash,
+ const void *key, void *data)
+{
+ uint32_t start_hash_address, hash_address;
+ struct igt_map_entry *available_entry = NULL;
+
+ if (map->entries >= map->max_entries) {
+ igt_map_rehash(map, map->size_index + 1);
+ } else if (map->deleted_entries + map->entries >= map->max_entries) {
+ igt_map_rehash(map, map->size_index);
+ }
+
+ start_hash_address = hash % map->size;
+ hash_address = start_hash_address;
+ do {
+ struct igt_map_entry *entry = map->table + hash_address;
+ uint32_t double_hash;
+
+ if (!entry_is_present(entry)) {
+ /* Stash the first available entry we find */
+ if (available_entry == NULL)
+ available_entry = entry;
+ if (entry_is_free(entry))
+ break;
+ }
+
+ /* Implement replacement when another insert happens
+ * with a matching key. This is a relatively common
+ * feature of hash tables, with the alternative
+ * generally being "insert the new value as well, and
+ * return it first when the key is searched for".
+ *
+ * Note that the hash table doesn't have a delete
+ * callback. If freeing of old data pointers is
+ * required to avoid memory leaks, perform a search
+ * before inserting.
+ */
+ if (!entry_is_deleted(entry) &&
+ entry->hash == hash &&
+ map->key_equals_function(key, entry->key)) {
+ entry->key = key;
+ entry->data = data;
+ return entry;
+ }
+
+
+ double_hash = 1 + hash % map->rehash;
+
+ hash_address = (hash_address + double_hash) % map->size;
+ } while (hash_address != start_hash_address);
+
+ if (available_entry) {
+ if (entry_is_deleted(available_entry))
+ map->deleted_entries--;
+ available_entry->hash = hash;
+ available_entry->key = key;
+ available_entry->data = data;
+ map->entries++;
+ return available_entry;
+ }
+
+ /* We could hit here if a required resize failed. An unchecked-malloc
+ * application could ignore this result.
+ */
+ return NULL;
+}
+
+/**
+ * igt_map_remove:
+ * @map: igt_map pointer
+ * @key: pointer to searched key
+ * @delete_function: function that frees data in igt_map_entry
+ *
+ * Function searches for an entry with a given @key, and removes it from
+ * the map. If @delete_function is passed, it will be called on removed entry.
+ *
+ * If the caller has previously found a struct igt_map_entry pointer,
+ * (from calling igt_map_search() or remembering it from igt_map_insert()),
+ * then igt_map_remove_entry() can be called instead to avoid an extra search.
+ */
+void
+igt_map_remove(struct igt_map *map, const void *key,
+ void (*delete_function)(struct igt_map_entry *entry))
+{
+ struct igt_map_entry *entry;
+
+ entry = igt_map_search_entry(map, key);
+ if (delete_function)
+ delete_function(entry);
+
+ igt_map_remove_entry(map, entry);
+}
+
+/**
+ * igt_map_remove_entry:
+ * @map: igt_map pointer
+ * @entry: pointer to map entry
+ *
+ * Function deletes the given hash entry.
+ *
+ * Note that deletion doesn't otherwise modify the table, so an iteration over
+ * the map deleting entries is safe.
+ */
+void
+igt_map_remove_entry(struct igt_map *map, struct igt_map_entry *entry)
+{
+ if (!entry)
+ return;
+
+ entry->key = deleted_key;
+ map->entries--;
+ map->deleted_entries++;
+}
+
+/**
+ * igt_map_next_entry:
+ * @map: igt_map pointer
+ * @entry: pointer to map entry, %NULL for the first map entry
+ *
+ * This function is an iterator over the hash table.
+ * Note that an iteration over the table is O(table_size) not O(entries).
+ *
+ * Returns: pointer to the next entry
+ */
+struct igt_map_entry *
+igt_map_next_entry(struct igt_map *map, struct igt_map_entry *entry)
+{
+ if (entry == NULL)
+ entry = map->table;
+ else
+ entry = entry + 1;
+
+ for (; entry != map->table + map->size; entry++) {
+ if (entry_is_present(entry)) {
+ return entry;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * igt_map_random_entry:
+ * @map: igt_map pointer
+ * @predicate: filtering entries function
+ *
+ * Functions returns random entry from the map. This may be useful in
+ * implementing random replacement (as opposed to just removing everything)
+ * in caches based on this hash table implementation. @predicate may be used to
+ * filter entries, or may be set to %NULL for no filtering.
+ *
+ * Returns: pointer to the randomly chosen map entry
+ */
+struct igt_map_entry *
+igt_map_random_entry(struct igt_map *map,
+ int (*predicate)(struct igt_map_entry *entry))
+{
+ struct igt_map_entry *entry;
+ uint32_t i = random() % map->size;
+
+ if (map->entries == 0)
+ return NULL;
+
+ for (entry = map->table + i; entry != map->table + map->size; entry++) {
+ if (entry_is_present(entry) &&
+ (!predicate || predicate(entry))) {
+ return entry;
+ }
+ }
+
+ for (entry = map->table; entry != map->table + i; entry++) {
+ if (entry_is_present(entry) &&
+ (!predicate || predicate(entry))) {
+ return entry;
+ }
+ }
+
+ return NULL;
+}
diff --git a/lib/igt_map.h b/lib/igt_map.h
new file mode 100644
index 000000000..cadcd6e35
--- /dev/null
+++ b/lib/igt_map.h
@@ -0,0 +1,174 @@
+/*
+ * Copyright © 2009,2021 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Eric Anholt <eric at anholt.net>
+ *
+ */
+
+#ifndef IGT_MAP_H
+#define IGT_MAP_H
+
+#include <inttypes.h>
+
+/**
+ * SECTION:igt_map
+ * @short_description: a linear-reprobing hashmap implementation
+ * @title: IGT Map
+ * @include: igt_map.h
+ *
+ * Implements an open-addressing, linear-reprobing hash table.
+ *
+ * For more information, see:
+ * http://cgit.freedesktop.org/~anholt/hash_table/tree/README
+ *
+ * Example usage:
+ *
+ *|[<!-- language="C" -->
+ * #define GOLDEN_RATIO_PRIME_32 0x9e370001UL
+ *
+ * static inline uint32_t hash_identifier(const void *val)
+ * {
+ * uint32_t hash = *(uint32_t *) val;
+ *
+ * hash = hash * GOLDEN_RATIO_PRIME_32;
+ * return hash;
+ * }
+ *
+ * static int equal_identifiers(const void *a, const void *b)
+ * {
+ * uint32_t *key1 = (uint32_t *) a, *key2 = (uint32_t *) b;
+ *
+ * return *key1 == *key2;
+ * }
+ *
+ * static void free_func(struct igt_map_entry *entry)
+ * {
+ * free(entry->data);
+ * }
+ *
+ * struct igt_map *map;
+ *
+ * struct record {
+ * int foo;
+ * uint32_t unique_identifier;
+ * };
+ *
+ * struct record *r1, r2, *record;
+ * struct igt_map_entry *entry;
+ *
+ * r1 = malloc(sizeof(struct record));
+ * map = igt_map_create(hash_identifier, equal_identifiers);
+ * igt_map_insert(map, &r1->unique_identifier, r1);
+ * igt_map_insert(map, &r2.unique_identifier, &r2);
+ *
+ * igt_map_foreach(map, entry) {
+ * record = entry->data;
+ * printf("key: %u, foo: %d\n", *(uint32_t *) entry->key, record->foo);
+ * }
+ *
+ * record = igt_map_search(map, &r1->unique_identifier);
+ * entry = igt_map_search_entry(map, &r2.unique_identifier);
+ *
+ * igt_map_remove(map, &r1->unique_identifier, free_func);
+ * igt_map_remove_entry(map, entry);
+ *
+ * igt_map_destroy(map, NULL);
+ * ]|
+ */
+
+struct igt_map_entry {
+ uint32_t hash;
+ const void *key;
+ void *data;
+};
+
+struct igt_map {
+ struct igt_map_entry *table;
+ uint32_t (*hash_function)(const void *key);
+ int (*key_equals_function)(const void *a, const void *b);
+ uint32_t size;
+ uint32_t rehash;
+ uint32_t max_entries;
+ uint32_t size_index;
+ uint32_t entries;
+ uint32_t deleted_entries;
+};
+
+struct igt_map *
+igt_map_create(uint32_t (*hash_function)(const void *key),
+ int (*key_equals_function)(const void *a, const void *b));
+void
+igt_map_destroy(struct igt_map *map,
+ void (*delete_function)(struct igt_map_entry *entry));
+
+struct igt_map_entry *
+igt_map_insert(struct igt_map *map, const void *key, void *data);
+
+void *
+igt_map_search(struct igt_map *map, const void *key);
+
+struct igt_map_entry *
+igt_map_search_entry(struct igt_map *map, const void *key);
+
+void
+igt_map_remove(struct igt_map *map, const void *key,
+ void (*delete_function)(struct igt_map_entry *entry));
+
+void
+igt_map_remove_entry(struct igt_map *map, struct igt_map_entry *entry);
+
+struct igt_map_entry *
+igt_map_next_entry(struct igt_map *map, struct igt_map_entry *entry);
+
+struct igt_map_entry *
+igt_map_random_entry(struct igt_map *map,
+ int (*predicate)(struct igt_map_entry *entry));
+/**
+ * igt_map_foreach
+ * @map: igt_map pointer
+ * @entry: igt_map_entry pointer
+ *
+ * Macro is a loop, which iterates through each map entry. Inside a
+ * loop block current element is accessible by the @entry pointer.
+ *
+ * This foreach function is safe against deletion (which just replaces
+ * an entry's data with the deleted marker), but not against insertion
+ * (which may rehash the table, making entry a dangling pointer).
+ */
+#define igt_map_foreach(map, entry) \
+ for (entry = igt_map_next_entry(map, NULL); \
+ entry != NULL; \
+ entry = igt_map_next_entry(map, entry))
+
+/* Alternate interfaces to reduce repeated calls to hash function. */
+struct igt_map_entry *
+igt_map_search_pre_hashed(struct igt_map *map,
+ uint32_t hash,
+ const void *key);
+
+struct igt_map_entry *
+igt_map_insert_pre_hashed(struct igt_map *map,
+ uint32_t hash,
+ const void *key, void *data);
+
+#endif
diff --git a/lib/meson.build b/lib/meson.build
index 672b42062..7254faeac 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -61,6 +61,7 @@ lib_sources = [
'igt_core.c',
'igt_draw.c',
'igt_list.c',
+ 'igt_map.c',
'igt_pm.c',
'igt_dummyload.c',
'uwildmat/uwildmat.c',
--
2.26.0
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