free(3) - NetBSD Manual Pages

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FREE(3)                   NetBSD Programmer's Manual                   FREE(3)


NAME

     free - free up memory allocated with malloc, calloc or realloc


SYNOPSIS

     #include <stdlib.h>

     void
     free(void *ptr);


DESCRIPTION

     The free() function causes the space pointed to by ptr to be deallocated,
     that is, made available for further allocation.  If ptr is a null point-
     er, no action occurs.  Otherwise, if the argument does not match a point-
     er earlier returned by the calloc,  malloc,  or realloc function, or if
     the space has been deallocated by a call to free() or realloc,  general
     havoc may occur.


RETURN VALUES

     The free() function returns no value.


SEE ALSO

     calloc(3),  malloc(3),  realloc(3)


STANDARDS

     The free() function conforms to ANSI X3.159-1989 (``ANSI C'').

4.4BSD                           June 29, 1991                               1