cfree - free allocated memory
#include <stdlib.h>
/* 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
feature_test_macros(7)):
cfree():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
This function should never be used. Use
free(3) instead. Starting with
version 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
<malloc.h>.
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
free(3).
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) family.
The
cfree() function was removed from glibc in version 2.26.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| cfree () |
Thread safety |
MT-Safe /* In glibc */ |
The 3-argument version of
cfree() as used by SCO conforms to the iBCSe2
standard: Intel386 Binary Compatibility Specification, Edition 2.
malloc(3)