posix_memalign.3: Document aligned_alloc().

diff --git a/lib/libc/stdlib/Makefile.inc b/lib/libc/stdlib/Makefile.inc
index a014174..3752d23 100644 (file)
--- a/lib/libc/stdlib/Makefile.inc
+++ b/lib/libc/stdlib/Makefile.inc
@@ -47,6 +47,7 @@ MLINKS+=hcreate.3 hdestroy.3 hcreate.3 hsearch.3
 MLINKS+=insque.3 remque.3
 MLINKS+=lsearch.3 lfind.3
 MLINKS+=malloc.3 calloc.3 malloc.3 free.3 malloc.3 realloc.3 malloc.3 reallocf.3
+MLINKS+=posix_memalign.3 aligned_alloc.3
 MLINKS+=ptsname.3 grantpt.3 ptsname.3 unlockpt.3
 MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3 qsort.3 qsort_r.3
 MLINKS+=radixsort.3 sradixsort.3

diff --git a/lib/libc/stdlib/posix_memalign.3 b/lib/libc/stdlib/posix_memalign.3
index 5fff120..050e358 100644 (file)
--- a/lib/libc/stdlib/posix_memalign.3
+++ b/lib/libc/stdlib/posix_memalign.3
@@ -25,11 +25,12 @@
 .\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 .\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd May 2, 2009
+.Dd August 9, 2012
 .Dt POSIX_MEMALIGN 3
 .Os
 .Sh NAME
-.Nm posix_memalign
+.Nm posix_memalign ,
+.Nm aligned_alloc
 .Nd aligned memory allocation
 .Sh LIBRARY
 .Lb libc
@@ -37,6 +38,8 @@
 .In stdlib.h
 .Ft int
 .Fn posix_memalign "void **ptr" "size_t alignment" "size_t size"
+.Ft void *
+.Fn aligned_alloc "size_t alignment" "size_t size"
 .Sh DESCRIPTION
 The
 .Fn posix_memalign
@@ -59,6 +62,16 @@ can be used as an argument in subsequent calls to
 .Xr reallocf 3 ,
 and
 .Xr free 3 .
+.Pp
+The
+.Fn aligned_alloc
+function is the same as
+.Fn posix_memalign ,
+but it takes just
+.Fa alignment
+and
+.Fa size
+and the allocation pointer is returned.
 .Sh IMPLEMENTATION NOTES
 The
 .Fn posix_memalign
@@ -77,10 +90,19 @@ well-fitted results when the requests are reasonable.
 The
 .Fn posix_memalign
 function returns the value 0 if successful; otherwise it returns an error value.
+The
+.Fn aligned_alloc
+returns a pointer to the allocated memory if successful; otherwise a
+.Dv NULL
+pointer is returned and
+.Va errno
+is set.
 .Sh ERRORS
 The
 .Fn posix_memalign
-function will fail if:
+and
+.Fn aligned_alloc
+functions will fail if:
 .Bl -tag -width Er
 .It Bq Er EINVAL
 The
@@ -101,3 +123,7 @@ The
 .Fn posix_memalign
 function conforms to
 .St -p1003.1-2008 .
+.\"The
+.\".Fn aligned_alloc
+.\"function conforms to
+.\".St -isoC-2011 .