.TH LIBSIMPLE_VALIGNED_ALLOCZN 3 libsimple
.SH NAME
libsimple_valigned_alloczn \- allocate optionally initialised memory with custom alignment

.SH SYNOPSIS
.nf
#include <libsimple.h>

void *libsimple_valigned_alloczn(int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP);
void *libsimple_envaligned_alloczn(int \fIstatus\fP, int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP);
inline void *libsimple_evaligned_alloczn(int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP);
inline void *libsimple_aligned_alloczn(int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */);
inline void *libsimple_enaligned_alloczn(int \fIstatus\fP, int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */);
inline void *libsimple_ealigned_alloczn(int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */);

#ifndef valigned_alloczn
# define valigned_alloczn libsimple_valigned_alloczn
#endif
#ifndef envaligned_alloczn
# define envaligned_alloczn libsimple_envaligned_alloczn
#endif
#ifndef evaligned_alloczn
# define evaligned_alloczn libsimple_evaligned_alloczn
#endif
#ifndef aligned_alloczn
# define aligned_alloczn libsimple_aligned_alloczn
#endif
#ifndef enaligned_alloczn
# define enaligned_alloczn libsimple_enaligned_alloczn
#endif
#ifndef ealigned_alloczn
# define ealigned_alloczn libsimple_ealigned_alloczn
#endif
.fi
.PP
Link with
.IR \-lsimple .

.SH DESCRIPTION
The
.BR libsimple_aligned_alloczn (),
.BR libsimple_enaligned_alloczn (),
and
.BR libsimple_ealigned_alloczn ()
functions allocate
.I N
bytes to the heap and return a pointer with an
alignment of
.I alignment
bytes to the allocated memory, where
.I N
is the product of
.I n
and all following arguments (which should have the type
.BR size_t )
up to the first 0;
.I n
must not be 0. The memory will be initialised
with zeroes if
.I clear
is a non-zero value. The function
.BR free (3)
shall be called with the returned pointer as
input when the allocated memory is no longer needed.
.PP
The
.BR libsimple_enaligned_alloczn ()
and
.BR libsimple_ealigned_alloczn ()
functions will terminate the process if the memory
cannot be allocated, by calling the
.BR libsimple_enprintf ()
and
.BR libsimple_eprintf ()
functions, respectively.
On failure, the process's exit value will be
.I status
if the
.BR libsimple_enaligned_alloczn ()
function is used or
.IR libsimple_default_failure_exit (3)
if the
.BR libsimple_ealigned_alloczn ()
function is used.
.PP
The
.BR libsimple_valigned_alloczn (),
.BR libsimple_envaligned_alloczn (),
and
.BR libsimple_evaligned_alloczn ()
functions are versions of the
.BR libsimple_aligned_alloczn (),
.BR libsimple_enaligned_alloczn (),
and
.BR libsimple_ealigned_alloczn (),
respectively, that use
.B va_list
instead of variadic arguments.

.SH RETURN VALUE
The
.BR libsimple_valigned_alloczn (),
.BR libsimple_envaligned_alloczn (),
.BR libsimple_evaligned_alloczn (),
.BR libsimple_aligned_alloczn (),
.BR libsimple_enaligned_alloczn (),
and
.BR libsimple_ealigned_alloczn ()
functions return a pointer to the allocated memory
upon success completion; otherwise the
.BR libsimple_valigned_alloczn ()
and
.BR libsimple_aligned_alloczn ()
functions return
.B NULL
and set
.I errno
it indicate the error, and the
.BR libsimple_envaligned_alloczn (),
.BR libsimple_evaligned_alloczn (),
.BR libsimple_enaligned_alloczn (),
and
.BR libsimple_ealigned_alloczn ()
functions terminated the process.

.SH ERRORS
The
.BR libsimple_valigned_alloczn (),
.BR libsimple_aligned_alloczn ()
function will fail if:
.TP
.B EINVAL
.I n
is 0.
.TP
.B EINVAL
.I n
is not a multiple of
.IR alignment .
.TP
.B EINVAL
.I alignment
is not a power of two.
.TP
.B ENOMEM
Enough memory could not be allocated.
.PP
The
.BR libsimple_envaligned_alloczn (),
.BR libsimple_evaligned_alloczn (),
.BR libsimple_enaligned_alloczn (),
and
.BR libsimple_ealigned_alloczn ()
functions will terminate the process on failure.

.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface	Attribute	Value
T{
.BR libsimple_valigned_alloczn (),
.br
.BR libsimple_envaligned_alloczn (),
.br
.BR libsimple_evaligned_alloczn (),
.br
.BR libsimple_aligned_alloczn (),
.br
.BR libsimple_enaligned_alloczn (),
.br
.BR libsimple_ealigned_alloczn ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_valigned_alloczn (),
.br
.BR libsimple_envaligned_alloczn (),
.br
.BR libsimple_evaligned_alloczn (),
.br
.BR libsimple_aligned_alloczn (),
.br
.BR libsimple_enaligned_alloczn (),
.br
.BR libsimple_ealigned_alloczn ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_valigned_alloczn (),
.br
.BR libsimple_envaligned_alloczn (),
.br
.BR libsimple_evaligned_alloczn (),
.br
.BR libsimple_aligned_alloczn (),
.br
.BR libsimple_enaligned_alloczn (),
.br
.BR libsimple_ealigned_alloczn ()
T}	Async-cancel safety	AC-Safe
.TE

.SH EXAMPLES
None.

.SH APPLICATION USAGE
None.

.SH RATIONALE
None.

.SH FUTURE DIRECTIONS
None.

.SH NOTES
None.

.SH HISTORY
libsimple 1.1

.SH BUGS
None.

.SH SEE ALSO
.BR libsimple_enmalloc (3),
.BR libsimple_mallocz (3),
.BR libsimple_vmallocn (3),
.BR libsimple_vmalloczn (3),
.BR libsimple_encalloc (3),
.BR libsimple_vcallocn (3),
.BR libsimple_enrealloc (3),
.BR libsimple_reallocarray (3),
.BR libsimple_vreallocn (3),
.BR libsimple_reallocf (3),
.BR libsimple_reallocarrayf (3),
.BR libsimple_vreallocfn (3),
.BR libsimple_aligned_realloc (3),
.BR libsimple_aligned_reallocarray (3),
.BR libsimple_aligned_vreallocn (3),
.BR libsimple_aligned_reallocf (3),
.BR libsimple_aligned_reallocarrayf (3),
.BR libsimple_aligned_vreallocfn (3),
.BR libsimple_memalign (3),
.BR libsimple_memalignz (3),
.BR libsimple_vmemalignn (3),
.BR libsimple_vmemalignzn (3),
.BR libsimple_enposix_memalign (3),
.BR libsimple_posix_memalignz (3),
.BR libsimple_vposix_memalignn (3),
.BR libsimple_vposix_memalignzn (3),
.BR libsimple_enaligned_alloc (3),
.BR libsimple_aligned_allocz (3),
.BR libsimple_valigned_allocn (3),
.BR libsimple_pvalloc (3),
.BR libsimple_pvallocz (3),
.BR libsimple_vpvallocn (3),
.BR libsimple_vpvalloczn (3),
.BR libsimple_valloc (3),
.BR libsimple_vallocz (3),
.BR libsimple_vvallocn (3),
.BR libsimple_vvalloczn (3),
.BR libsimple_vmemalloc (3),
.BR libsimple_varrayalloc (3),
.BR aligned_alloc (3)