.TH LIBSIMPLE_PVALLOCZ 3 2018-11-03 libsimple
.SH NAME
libsimple_pvallocz \- allocate optionally initialised memory with page size alignment
.SH SYNOPSIS
.nf
#include <libsimple.h>

static inline void *libsimple_pvallocz(int \fIclear\fP, size_t \fIn\fP);
static inline void *libsimple_enpvallocz(int \fIstatus\fP, int \fIclear\fP, size_t \fIn\fP);
static inline void *libsimple_epvallocz(int \fIclear\fP, size_t \fIn\fP);

#ifndef pvallocz
# define pvallocz libsimple_pvallocz
#endif
#ifndef enpvallocz
# define enpvallocz libsimple_enpvallocz
#endif
#ifndef epvallocz
# define epvallocz libsimple_epvallocz
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_pvallocz (),
.BR libsimple_enpvallocz (),
and
.BR libsimple_epvallocz ()
functions allocate
.I n
bytes, rounded up to the next multiple of the page size,
to the heap and return a pointer with an alignment of
the page size to the allocated memory. 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_enpvallocz ()
and
.BR libsimple_epvallocz ()
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_enpvallocz ()
function is used or
.IR libsimple_default_failure_exit (3)
if the
.BR libsimple_epvallocz ()
function is used.
.PP
The
.BR libsimple_enpvallocz ()
and
.BR libsimple_epvallocz ()
functions behaviour is unspecified if
.I n
is 0.
.SH RETURN VALUE
The
.BR libsimple_pvallocz (),
.BR libsimple_enpvallocz (),
and
.BR libsimple_epvallocz ()
functions return a pointer to the allocated memory
upon success completion; otherwise the
.BR libsimple_pvallocz ()
function return
.B NULL
and set
.I errno
it indicate the error, and the
.BR libsimple_enpvallocz ()
and
.BR libsimple_epvallocz ()
functions terminated the process.
.SH ERRORS
The
.BR libsimple_pvallocz ()
function will fail if:
.TP
.B EINVAL
.I n
is 0.
.TP
.B ENOMEM
Enough memory could not be allocated.
.PP
The
.BR libsimple_enpvallocz ()
and
.BR libsimple_epvallocz ()
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_pvallocz (),
.br
.BR libsimple_enpvallocz (),
.br
.BR libsimple_epvallocz ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_pvallocz (),
.br
.BR libsimple_enpvallocz (),
.br
.BR libsimple_epvallocz ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_pvallocz (),
.br
.BR libsimple_enpvallocz (),
.br
.BR libsimple_epvallocz ()
T}	Async-cancel safety	AC-Safe
.TE
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
The GNU implementation of
.BR pvalloc (3)
is \(dqMT-Unsafe init\(dq.
.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_vreallocn (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_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)