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Linux 2.6 - man page for calloc (linux section 3posix)

CALLOC(P)			    POSIX Programmer's Manual				CALLOC(P)

NAME
       calloc - a memory allocator

SYNOPSIS
       #include <stdlib.h>

       void *calloc(size_t nelem, size_t elsize);

DESCRIPTION
       The  calloc()  function shall allocate unused space for an array of nelem elements each of
       whose size in bytes is elsize. The space shall be initialized to all bits 0.

       The order and contiguity of storage allocated by successive calls to calloc() is  unspeci-
       fied. The pointer returned if the allocation succeeds shall be suitably aligned so that it
       may be assigned to a pointer to any type of object and then used to access such an  object
       or an array of such objects in the space allocated (until the space is explicitly freed or
       reallocated). Each such allocation shall yield a pointer to an object  disjoint	from  any
       other  object.  The pointer returned shall point to the start (lowest byte address) of the
       allocated space. If the space cannot be allocated, a null pointer shall	be  returned.  If
       the  size  of  the space requested is 0, the behavior is implementation-defined: the value
       returned shall be either a null pointer or a unique pointer.

RETURN VALUE
       Upon successful completion with both nelem and elsize non-zero, calloc()  shall	return	a
       pointer to the allocated space. If either nelem or elsize is 0, then either a null pointer
       or a unique pointer value that can be successfully passed to  free()  shall  be	returned.
       Otherwise, it shall return a null pointer    and set errno to indicate the error.

ERRORS
       The calloc() function shall fail if:

       ENOMEM Insufficient memory is available.

       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
       free()  ,  malloc()  ,  realloc()  ,  the Base Definitions volume of IEEE Std 1003.1-2001,
       <stdlib.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					CALLOC(P)


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