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+'\" et
+.TH POSIX_MEMALIGN "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+
+.SH NAME
+posix_memalign
+\(em aligned memory allocation
+(\fBADVANCED REALTIME\fP)
+.SH SYNOPSIS
+.LP
+.nf
+#include <stdlib.h>
+.P
+int posix_memalign(void **\fImemptr\fP, size_t \fIalignment\fP, size_t \fIsize\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIposix_memalign\fR()
+function shall allocate
+.IR size
+bytes aligned on a boundary specified by
+.IR alignment ,
+and shall return a pointer to the allocated memory in
+.IR memptr .
+The value of
+.IR alignment
+shall be a power of two multiple of
+.IR sizeof (\c
+.BR "void *" ).
+.P
+Upon successful completion, the value pointed to by
+.IR memptr
+shall be a multiple of
+.IR alignment .
+.P
+If the size of the space requested is 0, the behavior is
+implementation-defined; the value returned in
+.IR memptr
+shall be either a null pointer or a unique pointer.
+.P
+The
+\fIfree\fR()
+function shall deallocate memory that has previously been allocated by
+\fIposix_memalign\fR().
+.SH "RETURN VALUE"
+Upon successful completion,
+\fIposix_memalign\fR()
+shall return zero; otherwise, an error number shall be returned to
+indicate the error.
+.SH ERRORS
+The
+\fIposix_memalign\fR()
+function shall fail if:
+.TP
+.BR EINVAL
+The value of the alignment parameter is not a power of two multiple of
+.IR sizeof (\c
+.BR "void *" ).
+.TP
+.BR ENOMEM
+There is insufficient memory available with the requested alignment.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+The
+\fIposix_memalign\fR()
+function is part of the Advisory Information option and need not be
+provided on all implementations.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIfree\fR\^(\|)",
+.IR "\fImalloc\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<stdlib.h>\fP"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, Copyright (C) 2013 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.unix.org/online.html .
+
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .