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CFREE(3) Linux Programmer's Manual CFREE(3)


     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 */
     void cfree(void *ptr, size_t nelem, size_t elsize);
 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
         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 version 2.26, it has been removed from glibc.
 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 allo-
     cated 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
     |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.




     This  page  is  part of release 4.16 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
                                2017-09-15                          CFREE(3)
/data/webs/external/dokuwiki/data/pages/man/cfree.txt · Last modified: 2019/05/17 09:47 by

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