forked from dolphin-emu/dolphin
76 lines
1.2 KiB
C++
76 lines
1.2 KiB
C++
// Copyright 2013 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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#ifndef _FIXED_SIZE_QUEUE_H_
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#define _FIXED_SIZE_QUEUE_H_
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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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// Not fully featured, no safety checking yet. Add features as needed.
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// TODO: "inline" storage?
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template <class T, int N>
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class FixedSizeQueue
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{
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T *storage;
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int head;
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int tail;
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int count; // sacrifice 4 bytes for a simpler implementation. may optimize away in the future.
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// Make copy constructor private for now.
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FixedSizeQueue(FixedSizeQueue &other) { }
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public:
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FixedSizeQueue()
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{
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storage = new T[N];
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clear();
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}
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~FixedSizeQueue()
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{
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delete [] storage;
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}
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void clear() {
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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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storage[tail] = 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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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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const T &temp = storage[head];
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pop();
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return 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 {
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return count;
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}
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};
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#endif // _FIXED_SIZE_QUEUE_H_
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