Deprecate lnat, and use StgWord instead

lnat was originally "long unsigned int" but we were using it when we
wanted a 64-bit type on a 64-bit machine.  This broke on Windows x64,
where long == int == 32 bits.  Using types of unspecified size is bad,
but what we really wanted was a type with N bits on an N-bit machine.
StgWord is exactly that.

lnat was mentioned in some APIs that clients might be using
(e.g. StackOverflowHook()), so we leave it defined but with a comment
to say that it's deprecated.

1 files changed, 1 insertions, 1 deletions

diff --git a/rts/Arena.c b/rts/Arena.c
index 653eb69706..361c6c41be 100644
--- a/rts/Arena.c
+++ b/rts/Arena.c
@@ -80,7 +80,7 @@ arenaAlloc( Arena *arena, size_t size )
 	return p;
     } else {
 	// allocate a fresh block...
-	req_blocks =  (lnat)BLOCK_ROUND_UP(size) / BLOCK_SIZE;
+	req_blocks =  (W_)BLOCK_ROUND_UP(size) / BLOCK_SIZE;
 	bd = allocGroup_lock(req_blocks);
 	arena_blocks += req_blocks;