.TH LIBSIMPLE_VPOSIX_MEMALIGNN 3 libsimple
.SH NAME
libsimple_vposix_memalignn \- allocate memory with custom alignment
.SH SYNOPSIS
.nf
#include <libsimple.h>
inline int libsimple_vposix_memalignn(void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP);
inline void libsimple_envposix_memalignn(int \fIstatus\fP, void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP);
inline void libsimple_evposix_memalignn(void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, va_list \fIap\fP);
inline int libsimple_posix_memalignn(void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */);
inline void libsimple_enposix_memalignn(int \fIstatus\fP, void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */);
inline void libsimple_eposix_memalignn(void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, ..., /* (size_t)0 */);
#ifndef vposix_memalignn
# define vposix_memalignn libsimple_vposix_memalignn
#endif
#ifndef envposix_memalignn
# define envposix_memalignn libsimple_envposix_memalignn
#endif
#ifndef evposix_memalignn
# define evposix_memalignn libsimple_evposix_memalignn
#endif
#ifndef posix_memalignn
# define posix_memalignn libsimple_posix_memalignn
#endif
#ifndef enposix_memalignn
# define enposix_memalignn libsimple_enposix_memalignn
#endif
#ifndef eposix_memalignn
# define eposix_memalignn libsimple_eposix_memalignn
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_posix_memalignn (),
.BR libsimple_enposix_memalignn (),
and
.BR libsimple_eposix_memalignn ()
functions allocate
.I N
uninitialised bytes to the heap and store a
pointer with an alignment of
.I alignment
bytes to the allocated memory in
.IR memptr ,
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 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_memalignn ()
and
.BR libsimple_eposix_memalignn ()
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_enposix_memalignn ()
function is used or
.IR libsimple_default_failure_exit (3)
if the
.BR libsimple_eposix_memalignn ()
function is used.
.PP
The
.BR libsimple_vposix_memalignn (),
.BR libsimple_envposix_memalignn (),
and
.BR libsimple_evposix_memalignn ()
functions are versions of the
.BR libsimple_posix_memalignn (),
.BR libsimple_enposix_memalignn (),
and
.BR libsimple_eposix_memalignn (),
respectively, that use
.B va_list
instead of variadic arguments.
.SH RETURN VALUE
The
.BR libsimple_vposix_memalignn ()
and
.BR libsimple_posix_memalignn ()
functions return 0 upon successful completion;
otherwise an error code is returned to indicate
the error.
.PP
The
.BR libsimple_envposix_memalignn (),
.BR libsimple_evposix_memalignn (),
.BR libsimple_enposix_memalignn (),
and
.BR libsimple_eposix_memalignn ()
functions to not return a value, but
terminated the process on failure.
.SH ERRORS
The
.BR libsimple_vposix_memalignn (),
.BR libsimple_posix_memalignn ()
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_envposix_memalignn (),
.BR libsimple_evposix_memalignn (),
.BR libsimple_enposix_memalignn (),
and
.BR libsimple_eposix_memalignn ()
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_vposix_memalignn (),
.br
.BR libsimple_envposix_memalignn (),
.br
.BR libsimple_evposix_memalignn (),
.br
.BR libsimple_posix_memalignn (),
.br
.BR libsimple_enposix_memalignn (),
.br
.BR libsimple_eposix_memalignn ()
T} Thread safety MT-Safe
T{
.BR libsimple_vposix_memalignn (),
.br
.BR libsimple_envposix_memalignn (),
.br
.BR libsimple_evposix_memalignn (),
.br
.BR libsimple_posix_memalignn (),
.br
.BR libsimple_enposix_memalignn (),
.br
.BR libsimple_eposix_memalignn ()
T} Async-signal safety AS-Safe
T{
.BR libsimple_vposix_memalignn (),
.br
.BR libsimple_envposix_memalignn (),
.br
.BR libsimple_evposix_memalignn (),
.br
.BR libsimple_posix_memalignn (),
.br
.BR libsimple_enposix_memalignn (),
.br
.BR libsimple_eposix_memalignn ()
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_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)
