In C it is not enforced, but if you have a const pointer the compiler will complain if you pass it as an argument to a function expecting a non-const pointer.
-derek On Sat, December 22, 2012 7:14 am, Jethro Beekman wrote: > They're definitely not equivalent. Specifically: > >> If varA is defined as a const gchar *, will the program automatically >> free the >> memory allocated with g_strdup ? > > No. If you use strdup (or malloc, etc.), you need to free the resulting > pointer > afterwards. > > const on a pointer just means that you shouldn't modify the memory that > the > pointer points to. This is more useful when you use string constants. In > C, this > isn't strictly enforced, but in C++ it is. See also > http://publications.gbdirect.co.uk/c_book/chapter8/const_and_volatile.html > . > > Jethro > > On 22-12-12 12:51, Geert Janssens wrote: >> And now a question to show that I never had a formal c/c++ education. >> >> Are the below functions equivalent ? >> >> void funcA () >> { >> gchar *varA = g_strdup ("Test"); >> <do something with a> >> g_free (varA); >> } >> >> and >> >> >> void funcA () >> { >> const gchar *varA = g_strdup ("Test"); >> <do something with a> >> } >> >> I'm mostly wondering if the second function would have a memory leak or >> not. If >> varA is defined as a const gchar *, will the program automatically free >> the >> memory allocated with g_strdup ? >> >> I don't expect so, but I'm seeing mixed uses in GnuCash and want to >> determine >> for once and for all what is the proper way to handle this. >> >> Geert >> _______________________________________________ >> gnucash-devel mailing list >> gnucash-devel@gnucash.org >> https://lists.gnucash.org/mailman/listinfo/gnucash-devel >> > _______________________________________________ > gnucash-devel mailing list > gnucash-devel@gnucash.org > https://lists.gnucash.org/mailman/listinfo/gnucash-devel > -- Derek Atkins 617-623-3745 de...@ihtfp.com www.ihtfp.com Computer and Internet Security Consultant _______________________________________________ gnucash-devel mailing list gnucash-devel@gnucash.org https://lists.gnucash.org/mailman/listinfo/gnucash-devel
