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SDL_HashTable is now optionally thread-safe

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Fixes https://github.com/libsdl-org/SDL/issues/11635
This commit is contained in:
Sam Lantinga
2024-12-12 11:51:27 -08:00
parent e0cee83a3a
commit 61511c48a4
12 changed files with 175 additions and 181 deletions
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17
src/SDL_hashtable.h
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@@ -34,19 +34,36 @@ extern SDL_HashTable *SDL_CreateHashTable(void *data,
SDL_HashTable_HashFn hashfn,
SDL_HashTable_KeyMatchFn keymatchfn,
SDL_HashTable_NukeFn nukefn,
bool threadsafe,
bool stackable);
// This function is thread-safe if the hashtable was created with threadsafe = true
extern void SDL_EmptyHashTable(SDL_HashTable *table);
// This function is not thread-safe.
extern void SDL_DestroyHashTable(SDL_HashTable *table);
// This function is thread-safe if the hashtable was created with threadsafe = true
extern bool SDL_InsertIntoHashTable(SDL_HashTable *table, const void *key, const void *value);
// This function is thread-safe if the hashtable was created with threadsafe = true
extern bool SDL_RemoveFromHashTable(SDL_HashTable *table, const void *key);
// This function is thread-safe if the hashtable was created with threadsafe = true
extern bool SDL_FindInHashTable(const SDL_HashTable *table, const void *key, const void **_value);
// This function is thread-safe if the hashtable was created with threadsafe = true
extern bool SDL_HashTableEmpty(SDL_HashTable *table);
extern void SDL_LockHashTable(SDL_HashTable *table, bool for_writing);
extern void SDL_UnlockHashTable(SDL_HashTable *table);
// iterate all values for a specific key. This only makes sense if the hash is stackable. If not-stackable, just use SDL_FindInHashTable().
// This function is not thread-safe, you should use SDL_LockHashTable() if necessary
extern bool SDL_IterateHashTableKey(const SDL_HashTable *table, const void *key, const void **_value, void **iter);
// iterate all key/value pairs in a hash (stackable hashes can have duplicate keys with multiple values).
// This function is not thread-safe, you should use SDL_LockHashTable() if necessary
extern bool SDL_IterateHashTable(const SDL_HashTable *table, const void **_key, const void **_value, void **iter);
extern Uint32 SDL_HashPointer(const void *key, void *unused);