Section: Linux Programmer's Manual (3)
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cfree - free allocated memory
/* In SunOS 4 */
int cfree(void *ptr);
/* In glibc or FreeBSD libcompat */
void cfree(void *ptr);
/* In SCO OpenServer */
void cfree(char *ptr, unsigned num, unsigned size);
/* In Solaris watchmalloc.so.1 */
void cfree(void *ptr, size_t nelem, size_t elsize);
Feature Test Macro Requirements for glibc (see
_BSD_SOURCE || _SVID_SOURCE
This function should never be used.
In glibc, the function
is a synonym for
"added for compatibility with SunOS".
Other systems have other functions with this name.
The declaration is sometimes in
and sometimes in
Some SCO and Solaris versions have malloc libraries with a 3-argument
apparently as an analog to
If you need it while porting something, add
#define cfree(p, n, s) free((p))
to your file.
A frequently asked question is "Can I use
to free memory allocated with
or do I need
An SCO manual writes: "The cfree routine is provided for compliance
to the iBCSe2 standard and simply calls free.
The num and size
arguments to cfree are not used."
The SunOS version of
(which is a synonym for
returns 1 on success and 0 on failure.
In case of error,
is set to
the value of
was not a pointer to a block previously allocated by
one of the routines in the
The 3-argument version of
as used by SCO conforms to the iBCSe2 standard:
Intel386 Binary Compatibility Specification, Edition 2.
This page is part of release 3.74 of the Linux
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
- 1-arg cfree
- 3-arg cfree
- RETURN VALUE
- CONFORMING TO
- SEE ALSO