hpux man page for alloc

alloc(3)                                                     Library Functions Manual                                                     alloc(3)

NAME
       alloc - allocate memory

SYNTAX
       #include <alloc.h>

       char *alloc(new);

       void alloc_free(x);

       void alloc_re(&x,old,new);

       char *x;
       unsigned int old;
       unsigned int new;

DESCRIPTION
       alloc  allocates  enough  space  from the heap for new bytes of data, adequately aligned for any data type.  new may be 0.  alloc returns a
       pointer to the space.  If space is not available, alloc returns 0, setting errno appropriately.

       alloc_free returns space to the heap.

       alloc_re expands the space allocated to x from old bytes to new bytes.  It allocates new space, copies old bytes from the old space to  the
       new  space,  returns  the  old  space to the heap, and changes x to point to the new space.  It then returns 1.  If space is not available,
       alloc_re returns 0, leaving the old space alone.

SEE ALSO
       sbrk(2), malloc(3), error(3)

                                                                                                                                          alloc(3)