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[Discuss-gnuradio] Avoid double memory initilization in PMT unified vect

From: Stefan Brüns
Subject: [Discuss-gnuradio] Avoid double memory initilization in PMT unified vectors
Date: Tue, 07 Oct 2008 19:26:08 +0200
User-agent: KMail/1.9.9


in PMT, there is code like:

pmt_u8vector::pmt_u8vector(size_t k, uint8_t fill)
  : d_v(k)
  for (size_t i = 0; i < k; i++)
    d_v[i] = fill;

As std::vector initializes the memory by itself when called with an size 
argument in the constructor, the memory is initialized twice.

A faster version with the same result is:

pmt_u8vector::pmt_u8vector(size_t k, uint8_t fill)
  : d_v(k, fill)

Same is true for the other data types.

Another question:
Why are the classes for the different types written "by hand", and not using 
templates, eg:

template <typename T>
class pmt_uniform_vector
typedef pmt_uniform_vector< uint8_t > pmt_u8vector;


Stefan Brüns  /  Bergstraße 21  /  52062 Aachen
mailto:lurch at gmx.li  http://www.kawo1.rwth-aachen.de/~lurchi/
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