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)