Handle-with-cache.c ((full)) < 2026 Edition >

typedef struct cache_handle cache_handle_t;

int handle_read_zero_copy(cache_handle_t *h, void **out_ptr, size_t count, off_t offset) // Instead of copying data to user buffer, return a pointer directly into the cache cache_entry_t *entry = cache_find_or_load(h, offset, count); if (!entry) return -ENOMEM; *out_ptr = entry->data + (offset % h->internal_cache->block_size); entry->refcount++; // Pin the entry handle-with-cache.c

: Often a hash table or a linked list that maps resource paths (keys) to their data (values). typedef struct cache_handle cache_handle_t

cache_t;

pthread_mutex_unlock(&cache_lock);

static UserProfile* load_user_profile_from_disk(int user_id) // Simulate expensive I/O printf("Loading user %d from disk...\n", user_id); sleep(1); // Pretend this is slow UserProfile *profile = malloc(sizeof(UserProfile)); profile->user_id = user_id; profile->name = malloc(32); profile->email = malloc(64); sprintf(profile->name, "User_%d", user_id); sprintf(profile->email, "user%d@example.com", user_id); return profile; int handle_read_zero_copy(cache_handle_t *h