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