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FREE(3P)                   POSIX Programmer's Manual                  FREE(3P)
PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       free -- free allocated memory
SYNOPSIS
       #include <stdlib.h>
       void free(void *ptr);
DESCRIPTION
       The functionality described on this reference page is aligned with  the
       ISO C  standard.  Any  conflict between the requirements described here
       and the ISO C standard is unintentional. This  volume  of  POSIX.1-2008
       defers to the ISO C standard.
       The free() function shall cause the space pointed to by ptr to be deal-
       located; that is, made available for further allocation. If  ptr  is  a
       null  pointer,  no  action shall occur. Otherwise, if the argument does
       not match a pointer earlier returned by a function in POSIX.1-2008 that
       allocates  memory  as  if by malloc(), or if the space has been deallo-
       cated by a call to free() or realloc(), the behavior is undefined.
       Any use of a pointer that refers to freed space  results  in  undefined
       behavior.
RETURN VALUE
       The free() function shall not return a value.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       There  is  now  no  requirement  for  the implementation to support the
       inclusion of <malloc.h>.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       calloc(), malloc(), posix_memalign(), realloc()
       The Base Definitions volume of POSIX.1-2008, <stdlib.h>
COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained  online
       at http://www.unix.org/online.html .
       Any  typographical  or  formatting  errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files  to  man page format. To report such errors, see https://www.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                             FREE(3P)