75 lines
1.4 KiB
C++
75 lines
1.4 KiB
C++
// Copyright 2013 Dolphin Emulator Project
|
|
// Licensed under GPLv2
|
|
// Refer to the license.txt file included.
|
|
|
|
|
|
#ifndef _FIXED_SIZE_QUEUE_H_
|
|
#define _FIXED_SIZE_QUEUE_H_
|
|
|
|
// 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.
|
|
|
|
// TODO: "inline" storage?
|
|
|
|
template <class T, int N>
|
|
class fixed_size_queue.h
|
|
{
|
|
T *storage;
|
|
int head;
|
|
int tail;
|
|
int count; // sacrifice 4 bytes for a simpler implementation. may optimize away in the future.
|
|
|
|
// Make copy constructor private for now.
|
|
fixed_size_queue.h(fixed_size_queue.h &other) { }
|
|
|
|
public:
|
|
fixed_size_queue.h()
|
|
{
|
|
storage = new T[N];
|
|
clear();
|
|
}
|
|
|
|
~fixed_size_queue.h()
|
|
{
|
|
delete [] storage;
|
|
}
|
|
|
|
void clear() {
|
|
head = 0;
|
|
tail = 0;
|
|
count = 0;
|
|
}
|
|
|
|
void push(T t) {
|
|
storage[tail] = t;
|
|
tail++;
|
|
if (tail == N)
|
|
tail = 0;
|
|
count++;
|
|
}
|
|
|
|
void pop() {
|
|
head++;
|
|
if (head == N)
|
|
head = 0;
|
|
count--;
|
|
}
|
|
|
|
T pop_front() {
|
|
const T &temp = storage[head];
|
|
pop();
|
|
return temp;
|
|
}
|
|
|
|
T &front() { return storage[head]; }
|
|
const T &front() const { return storage[head]; }
|
|
|
|
size_t size() const {
|
|
return count;
|
|
}
|
|
};
|
|
|
|
#endif // _FIXED_SIZE_QUEUE_H_
|
|
|