registry.h

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#pragma once
 
#include "defines.h"
#include "identifiers/khandle.h"
 
typedef enum kregistry_entry_change_type {
    // The block of memory was changed/replaced.
    K_REGISTRY_CHANGE_TYPE_BLOCK_CHANGED,
    // The block of memory/the entry was destroyed.
    K_REGISTRY_CHANGE_TYPE_DESTROYED
} kregistry_entry_change_type;
 
typedef void (*PFN_on_registry_entry_updated)(void* sender, void* block, u64 size, kregistry_entry_change_type change_type);
 
typedef struct kregistry_entry_listener_callback {
    void* listener;
    PFN_on_registry_entry_updated callback;
} kregistry_entry_listener_callback;
 
typedef struct kregistry_entry {
    u64 uniqueid;
    u64 block_size;
    void* block;
    i32 reference_count;
    b8 auto_release;
 
    // darray
    kregistry_entry_listener_callback* callbacks;
} kregistry_entry;
 
typedef struct k_registry {
    // darray
    kregistry_entry* entries;
} kregistry;
 
KAPI void kregistry_create(kregistry* out_registry);
 
KAPI void kregistry_destroy(kregistry* registry);
 
KAPI khandle kregistry_add_entry(kregistry* registry, const void* block, u64 size, b8 auto_release);
 
KAPI b8 kregistry_entry_set(kregistry* registry, khandle entry_handle, const void* block, u64 size, void* sender);
 
KAPI b8 kregistry_entry_update_callback_for_listener(kregistry* registry, khandle entry_handle, void* listener, PFN_on_registry_entry_updated updated_callback);
 
KAPI void* kregistry_entry_acquire(kregistry* registry, khandle entry_handle, void* listener, PFN_on_registry_entry_updated updated_callback);
 
KAPI void kregistry_entry_release(kregistry* registry, khandle entry_handle, void* listener);