use TBB scalable allocator and stl allocator together

[fenglai]

Hello there. I have a matrix class who use the stl vector to manage its
memory(UInt is typedef of size_t):
class Mtrx {

protected:

UInt row; ///< row dimension
UInt col; ///< column dimension
UInt ld; ///< leading dimension
vector<Double> array; ///< used to hold the memory for data
}
This matrix is designed for normal use.

On the other hand, my code is also running heavy calculation in multi-threading
environment, in which I use TBB to do parallelization. Inside the thread I
designed the local matrix, which means the matrix is local to a single thread:
class Mtrx {

protected:

UInt row; ///< row dimension
UInt col; ///< column dimension
UInt ld; ///< leading dimension
vector<Double,tbb::scalable_allocator<Double> > array;
}

However, the two different classes are only different with each other on the allocator. I am thinking, that a elegant way should be merging them together.
Do you have any ideas to do that?

Thanks a lot!

[MiiNiPaa]

Make class templated and add allocator as template parameter with default value.