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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <cassert>
#include <cstddef>
namespace vespalib::datastore::test {
/*
* Class representing expected buffer stats in unit tests.
*/
struct BufferStats
{
// elements
size_t _used;
size_t _hold;
size_t _dead;
// bytes
size_t _extra_used;
size_t _extra_hold;
BufferStats() : _used(0), _hold(0), _dead(0), _extra_used(0), _extra_hold(0) {}
BufferStats &used(size_t val) { _used += val; return *this; }
BufferStats &hold(size_t val) { _hold += val; return *this; }
BufferStats &dead(size_t val) { _dead += val; return *this; }
BufferStats &extra_used(size_t val) { _extra_used += val; return *this; }
BufferStats &extra_hold(size_t val) { _extra_hold += val; return *this; }
BufferStats &hold_to_dead(size_t val) {
dec_hold(val);
_dead += val;
return *this;
}
BufferStats &dec_used(size_t val) {
assert(_used >= val);
_used -= val;
return *this;
}
BufferStats &dec_hold(size_t val) {
assert(_hold >= val);
_hold -= val;
return *this;
}
BufferStats &dec_extra(size_t val) {
assert(_extra_used >= val);
assert(_extra_hold >= val);
_extra_used -= val;
_extra_hold -= val;
return *this;
}
};
}
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