Handle-with-cache.c Apr 2026

pthread_mutex_unlock(&cache_lock); } A cache without eviction is a memory leak. handle-with-cache.c should implement a policy like LRU (Least Recently Used) or TTL (Time To Live) .

GHashTableIter iter; gpointer key, value; g_hash_table_iter_init(&iter, handle_cache); while (g_hash_table_iter_next(&iter, &key, &value)) { CacheEntry *entry = value; if (entry->ref_count == 0 && (now - entry->last_access) > max_age_seconds) { to_remove = g_list_prepend(to_remove, key); } } handle-with-cache.c

UserProfile* get_user_profile_handle(int user_id) { pthread_mutex_lock(&cache_lock); // Check cache CacheEntry *entry = g_hash_table_lookup(handle_cache, &user_id); if (entry) { // Cache hit entry->ref_count++; entry->last_access = time(NULL); pthread_mutex_unlock(&cache_lock); printf("Cache hit for user %d\n", user_id); return entry->profile; } A "handle" is an opaque pointer or identifier

pthread_mutex_unlock(&cache_lock); return profile; } &value)) { CacheEntry *entry = value

A common optimization is or using a per-key mutex:

The module handle-with-cache.c exemplifies a classic design pattern: the . A "handle" is an opaque pointer or identifier to a resource, and the cache stores recently accessed handles to avoid redundant initialization or I/O operations.