/* In SunOS 4 */
int cfree(void *ptr);
/* In glibc or FreeBSD libcompat */
void cfree(void *ptr);
/* In SCO OpenServer */
void cfree(char ptr[.size* .num], unsigned int num, unsigned int size);
/* In Solaris watchmalloc.so.1 */
void cfree(void ptr[.elsize* .nelem], size_t nelem, size_t elsize);
Feature Test Macro Requirements for glibc (see
Since glibc 2.19:
glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
This function should never be used. Use free(3) instead.
Starting with glibc 2.26, it has been removed from glibc.
In glibc, the function cfree() is a synonym for free(3), "added
for compatibility with SunOS".
Other systems have other functions with this name. The
declaration is sometimes in <stdlib.h> and sometimes in
Some SCO and Solaris versions have malloc libraries with a
3-argument cfree(), apparently as an analog to calloc(3).
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 free(3) to free memory
allocated with calloc(3), or do I need cfree()?" Answer: use
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 cfree() (which is a synonym for free(3))
returns 1 on success and 0 on failure. In case of error, errno
is set to EINVAL: the value of ptr was not a pointer to a block
previously allocated by one of the routines in the malloc(3)
For an explanation of the terms used in this section, see
│Interface │ Attribute │ Value │
│cfree() │ Thread safety │ MT-Safe /* In glibc */ │