LibFifo.hpp

//------------------------------------------------------------------------------
//This file is part of milkLib. 
//See license.txt for the full license governing this code.
//------------------------------------------------------------------------------

#ifndef LIB_FIFO_HPP_
#define LIB_FIFO_HPP_

template<class T, int N>
class LibFifo {
public:
    LibFifo();
    ~LibFifo();

    bool give(T& item);
    bool take(T& item);

private:
    T mArray[N];

    int mCurrentCount;
    int mIdxIn;
    int mIdxOut;
};

template<class T, int N>
LibFifo<T, N>::LibFifo() {
    mCurrentCount = 0;
    mIdxIn = 0;
    mIdxOut = 0;
}

template<class T, int N>
LibFifo<T, N>::~LibFifo() {

}

template<class T, int N>
bool LibFifo<T, N>::give(T& item) {
    if (mCurrentCount >= N) {
        return false;
    }
    mArray[mIdxIn++] = item;
    if (mIdxIn >= N) {
        mIdxIn = 0;
    }
    mCurrentCount++;
    return true;
}

template<class T, int N>
bool LibFifo<T, N>::take(T& item) {
    if (mCurrentCount <= 0) {
        return false;
    }
    item = mArray[mIdxOut++];
    if (mIdxOut >= N) {
        mIdxOut = 0;
    }
    mCurrentCount--;
    return true;
}

#endif /* LIB_FIFO_HPP_ */