Give align the same barrier requirement as malloc

Adds a barrier at exit requirement to shmem_align (same as
shmem_malloc).  Also, change explicit requirement for a call to
shmem_barrier_all to the less restrictive "semantic equivalence".

Signed-off-by: David Ozog <[email protected]>

content/shmem_malloc.tex

@@ -43,11 +43,12 @@
     \CONST{NULL} pointer, the block to which it points is freed. If the space cannot
     be allocated, the block to which \VAR{ptr} points is unchanged.
 
-    The \FUNC{shmem\_malloc}, \FUNC{shmem\_free}, and \FUNC{shmem\_realloc} routines
+    The \FUNC{shmem\_malloc}, \FUNC{shmem\_align}, \FUNC{shmem\_free}, and \FUNC{shmem\_realloc} routines
     are provided  so that multiple \ac{PE}s in a program can allocate symmetric,
     remotely accessible memory blocks.  These memory blocks can then be used with
     \openshmem communication routines.  Each of these routines include at least one
-    call to \FUNC{shmem\_barrier\_all}: \FUNC{shmem\_malloc} calls a
+    call to a procedure that is semantically equivalent to \FUNC{shmem\_barrier\_all}:
+    \FUNC{shmem\_malloc} and \FUNC{shmem\_align} call a
     barrier on exit; \FUNC{shmem\_free} calls a barrier on entry; and
     \FUNC{shmem\_realloc} may call barriers on both entry and exit, depending on
     whether an existing allocation is modified and whether new memory is allocated.