Simplified distributed block storage with strong consistency, like in Ceph
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#pragma once
#include <stdint.h>
// Hierarchical bitmap allocator
class allocator
uint64_t size;
uint64_t free;
uint64_t last_one_mask;
uint64_t *mask;
allocator(uint64_t blocks);
void set(uint64_t addr, bool value);
uint64_t find_free();
uint64_t get_free_count();