Just a minor new twist on free()

[Paul D. Smith]

In article <7365 at darkstar.ucsc.edu> funkstr at ucscb.ucsc.edu (Larry Hastings) writes:


[] #define smart_free(x) { if (x != NULL) { free(x); x = NULL; } }


It should be pointed out that in ANSI C free(NULL) is defined, and is
legal (any conforming implementation of free() must ignore being
passed a NULL pointer).

So, you could save yourself some execution time (if you have an ANSI
compiler) by writing:

#define smart_free(x) { free(x); x = NULL; }

(you may also want to peruse the seperate thread in this newsgroup on
multi-statement macros and `while(0)' loops, etc.)
--

                                                                paul
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