Sometimes it's very entertaining to browse through the source code. For
example, I ran across the following idiom this morning, and it made me
chuckle:
if(m_pHeaderSL)
{
DELETEP(m_pHeaderSL);
m_pHeaderSL = NULL;
}
Why did I find this funny? Well, take a look at the definition of the
DELETEP macro in the following file:
abi/src/af/util/xp/ut_types.h
It reads:
#define DELETEP(p) do { if (p) { delete(p); (p)=NULL; } } while (0)
In short, the whole reason we created those macros was to ensure that all
delete, free, etc. calls did all of the nice null-sanity work you'd usually
want. Thus instead of typing the risky:
delete m_pHeaderSL;
or the verbose-but-safer:
if(m_pHeaderSL)
{
delete m_pHeaderSL;
m_pHeaderSL = NULL;
}
you could just type:
DELETEP(m_pHeaderSL);
and be done with it!
bottom line
-----------
We have convenience macros to wrap all of the following calls for pointers:
free it
delete it
vector delete it
delete and replace it
ref-count it
deref-count it
If you're not sure how to use them, ask!
Paul
motto -- a little macro goes a long, long way
