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

    NAME
           calloc,  malloc, free, realloc - Allocate and free dynamic
           memory

    SYNOPSIS
           #include <stdlib.h>

           void *calloc(size_t nmemb, size_t size);
           void *malloc(size_t size);
           void free(void *ptr);
           void *realloc(void *ptr, size_t size);

    DESCRIPTION
           calloc() allocates memory for an array of  nmemb  elements
           of  size bytes each and returns a pointer to the allocated
           memory.  The memory is set to zero.

           malloc() allocates size bytes and returns a pointer to the
           allocated memory.  The memory is not cleared.

           free()  frees  the  memory  space pointed to by ptr, which
           must have been returned by a previous  call  to  malloc(),
           calloc()  or  realloc().   If ptr is NULL, no operation is
           performed.

           realloc() changes the size of the memory block pointed  to
           by  ptr  to size bytes.  The contents will be unchanged to
           the minimum of the old an new sizes; newly allocated  mem-
           ory  will  be  uninitialized.  If ptr is NULL, the call is
           equivalent to malloc(size); if size is equal to zero,  the
           call  is  equivalent to free(ptr).  Unless ptr is NULL, it
           must have been returned by an earlier  call  to  malloc(),
           calloc() or realloc().

    RETURN VALUES
           For calloc() and malloc(), the value returned is a pointer
           to the allocated memory, which is suitably aligned for any
           kind of variable, or NULL if the request fails.

           free() returns no value.

           realloc() returns a pointer to the newly allocated memory,
           which is suitably aligned for any kind of variable and may
           be  different from ptr, or NULL if the request fails or if
           size was equal to 0.   If  realloc()  fails  the  original
           block is left untouched - it is not freed or moved.

    CONFORMS TO
           ANSI - C

### SEE ALSO

brk,

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    GNU                       April 4, 1993                         1

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