.TH LIBSIMPLE_POSIX_MEMALIGNZ 3 libsimple
.SH NAME
libsimple_posix_memalignz \- allocate optionally initialised memory with custom alignment

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

inline int libsimple_posix_memalignz(void **\fImemptr\fP, int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP);
void libsimple_enposix_memalignz(int \fIstatus\fP, void **\fImemptr\fP, int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP);
inline void libsimple_eposix_memalignz(void **\fImemptr\fP, int \fIclear\fP, size_t \fIalignment\fP, size_t \fIn\fP);

#ifndef posix_memalignz
# define posix_memalignz libsimple_posix_memalignz
#endif
#ifndef enposix_memalignz
# define enposix_memalignz libsimple_enposix_memalignz
#endif
#ifndef eposix_memalignz
# define eposix_memalignz libsimple_eposix_memalignz
#endif
.fi
.PP
Link with
.IR \-lsimple .

.SH DESCRIPTION
The
.BR libsimple_posix_memalignz (),
.BR libsimple_enposix_memalignz (),
and
.BR libsimple_eposix_memalignz ()
functions allocate
.I n
bytes to the heap and store a pointer with an
alignment of
.I alignment
bytes to the allocated memory in
.IR memptr .
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 pointer stored in
.I memptr
as input when the allocated memory is no longer needed.
.I *memptr
remains unmodified on failure.
.PP
The
.BR libsimple_enposix_memalignz ()
and
.BR libsimple_eposix_memalignz ()
functions will terminate the process if the memory
cannot be allocated of if the user tries to allocate
0 bytes, 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_enposix_memalignz ()
function is used or
.IR libsimple_default_failure_exit (3)
if the
.BR libsimple_eposix_memalignz ()
function is used.
.PP
The
.BR libsimple_enposix_memalignz ()
and
.BR libsimple_eposix_memalignz ()
functions behaviour is unspecified if
.I n
is 0.

.SH RETURN VALUE
The
.BR libsimple_posix_memalignz ()
function returns 0 upon successful completion;
otherwise an error code is returned to indicate
the error.
.PP
The
.BR libsimple_enposix_memalignz ()
and
.BR libsimple_eposix_memalignz ()
functions do not return a value, but
terminated the process on failure.

.SH ERRORS
The
.BR libsimple_posix_memalignz ()
function will fail if:
.TP
.B EINVAL
.I n
is 0.
.TP
.B EINVAL
.I alignment
is not a power of two.
.TP
.B EINVAL
.I alignment
is not a multiple of
.IR "sizeof(void *)" .
.TP
.B ENOMEM
Enough memory could not be allocated.
.PP
The
.BR libsimple_enposix_memalignz ()
and
.BR libsimple_eposix_memalignz ()
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_posix_memalignz (),
.br
.BR libsimple_enposix_memalignz (),
.br
.BR libsimple_eposix_memalignz ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_posix_memalignz (),
.br
.BR libsimple_enposix_memalignz (),
.br
.BR libsimple_eposix_memalignz ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_posix_memalignz (),
.br
.BR libsimple_enposix_memalignz (),
.br
.BR libsimple_eposix_memalignz ()
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_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_valigned_alloczn (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 posix_memalign (3)