.TH LIBSIMPLE_ALIGNED_REALLOCARRAY 3 2018-11-29 libsimple
.SH NAME
libsimple_aligned_reallocarray \- reallocate memory and customise alignment
.SH SYNOPSIS
.nf
#include <libsimple.h>

static inline void *libsimple_aligned_reallocarray(void *\fIptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, size_t \fIm\fP);
void *libsimple_enaligned_reallocarray(int \fIstatus\fP, void *\fIptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, size_t \fIm\fP);
static inline void *libsimple_ealigned_reallocarray(void *\fIptr\fP, size_t \fIalignment\fP, size_t \fIn\fP, size_t \fIm\fP);

#ifndef aligned_reallocarray
# define aligned_reallocarray libsimple_aligned_reallocarray
#endif
#ifndef enaligned_reallocarray
# define enaligned_reallocarray libsimple_enaligned_reallocarray
#endif
#ifndef ealigned_reallocarray
# define ealigned_reallocarray libsimple_ealigned_reallocarray
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_aligned_reallocarray (),
.BR libsimple_enaligned_reallocarray (),
and
.BR libsimple_ealigned_reallocarray ()
functions reallocate memory allocated on
the heap and return the older pointer or a new
pointer with the alignment of
.I alignment
to the allocated memory of 
.I n*m
bytes. The behaviour is unspecified if
.I n
or
.I m
is 0. The returned pointer will contain the
same content as
.IR ptr ,
but truncated to
.I n*m
bytes if it is smaller or with the new bytes
unitialised if it is larger. If a new pointer
is returned, rather than
.IR ptr ,
.I ptr
is deallocated;
.I ptr
is not deallocated on failure. 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_reallocarray ()
and
.BR libsimple_ealigned_reallocarray ()
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_reallocarray ()
function is used or
.IR libsimple_default_failure_exit (3)
if the
.BR libsimple_ealigned_reallocarray ()
function is used.
.SH RETURN VALUE
The
.BR libsimple_aligned_reallocarray (),
.BR libsimple_enaligned_reallocarray (),
and
.BR libsimple_ealigned_reallocarray ()
functions return a pointer to the allocated memory
upon success completion; otherwise the
.BR libsimple_aligned_reallocarray ()
function returns
.B NULL
and set
.I errno
it indicate the error, and the
.BR libsimple_enaligned_reallocarray ()
and
.BR libsimple_ealigned_reallocarray ()
functions terminated the process.
.SH ERRORS
The
.BR libsimple_aligned_reallocarray ()
function will fail for the reasons specified for the
.BR realloc (3)
function, and if:
.TP
.B EINVAL
.I alignment
is an invalid alignment (usually it needs to be an power of 2).
.TP
.B ENOSYS
The function is not implemented. The function requires
non-standard libc functions, and is therefore not supported
for all libc implementations.

The function is implemented if and only if the macro
.B LIBSIMPLE_HAVE_ALIGNED_REALLOC
is defined by the library.
.PP
The
.BR libsimple_enaligned_reallocarray ()
and
.BR libsimple_ealigned_reallocarray ()
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_aligned_reallocarray (),
.br
.BR libsimple_enaligned_reallocarray (),
.br
.BR libsimple_ealigned_reallocarray ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_aligned_reallocarray (),
.br
.BR libsimple_enaligned_reallocarray (),
.br
.BR libsimple_ealigned_reallocarray ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_aligned_reallocarray (),
.br
.BR libsimple_enaligned_reallocarray (),
.br
.BR libsimple_ealigned_reallocarray ()
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 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_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_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 malloc (3)