forked from dolphin-emu/dolphin
61 lines
1.1 KiB
C++
61 lines
1.1 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <cstddef>
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#include <utility>
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// STL-look-a-like interface, but name is mixed case to distinguish it clearly from the
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// real STL classes.
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//
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// Not fully featured, no safety checking yet. Add features as needed.
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template <class T, int N>
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class FixedSizeQueue
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{
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public:
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void clear()
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{
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head = 0;
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tail = 0;
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count = 0;
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}
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void push(T t)
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{
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storage[tail] = std::move(t);
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tail++;
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if (tail == N)
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tail = 0;
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count++;
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}
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void pop()
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{
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head++;
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if (head == N)
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head = 0;
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count--;
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}
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T pop_front()
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{
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T& temp = storage[head];
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pop();
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return std::move(temp);
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}
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T& front() { return storage[head]; }
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const T& front() const { return storage[head]; }
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size_t size() const { return count; }
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private:
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std::array<T, N> storage;
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int head = 0;
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int tail = 0;
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// Sacrifice 4 bytes for a simpler implementation. may optimize away in the future.
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int count = 0;
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};
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