31 lines
720 B
C++
31 lines
720 B
C++
#pragma once
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#include <optional>
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template<typename T, size_t N>
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class FIFO {
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private:
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size_t produce = 0;
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size_t consume = 0;
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bool empty = true;
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T storage[N];
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public:
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bool push(T x) {
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if(produce == consume && !empty)
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return false;
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storage[produce] = x;
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produce = (produce + 1) % N;
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empty = false;
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return true;
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}
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std::optional<T> pull() {
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if(empty)
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return std::nullopt;
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T ret = storage[consume];
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consume = (consume + 1) % N;
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if(produce == consume)
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empty = true;
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return ret;
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}
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};
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