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cfree(3)


NAME

   cfree - free allocated memory

SYNOPSIS

   #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

DESCRIPTION

   This function should never be used.  Use free(3) instead.

   1-arg cfree
   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>.

   3-arg cfree
   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."

RETURN VALUE

   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.

ATTRIBUTES

   For  an  explanation  of  the  terms  used   in   this   section,   see
   attributes(7).

   
   Interface  Attribute      Value                  
   
   cfree()    Thread safety  MT-Safe /* In glibc */

CONFORMING TO

   The 3-argument version of cfree() as used by SCO conforms to the iBCSe2
   standard: Intel386 Binary Compatibility Specification, Edition 2.

SEE ALSO

   malloc(3)

COLOPHON

   This page is part of release 4.09 of the Linux  man-pages  project.   A
   description  of  the project, information about reporting bugs, and the
   latest    version    of    this    page,    can     be     found     at
   https://www.kernel.org/doc/man-pages/.

                              2016-03-15                          CFREE(3)



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