From:	Eric Rudd <rudd AT cyberoptics DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Another aspect of free() ?
Date:	10 Jan 1997 15:36:57 GMT
Organization:	CyberOptics Corp
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Message-ID:	<5b5nmq$i4c@hagar.cyberoptics.com>
References:	<199701090726 DOT KAA00800 AT marstu DOT mari DOT su> <32D4B22D DOT 54F9 AT post DOT comstar DOT ru>
NNTP-Posting-Host:	rudd.cyberoptics.com
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

According to the ANSI/ISO C specification, sub-clause 7.10.3.2,

"The _free_ function causes the space pointed to by _ptr_ to be 
deallocated, that is, made available for further allocation.  If 
_ptr_ is a null pointer, no action occurs."

Thus, if the compiler implementation conforms to the C standard, 
it is acceptable to pass it a null pointer.

-Eric Rudd
rudd AT cyberoptics DOT com

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