X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FArena.c;h=76ac23cf88d3e81c65e2208627fefc4c48cb2946;hb=45252b35151fc55aa19fb6770df5ed8267639083;hp=ba6774b39308850592fc1b674fc86eff2516ee4e;hpb=7457757f193b28b5fe8fee01edbed012c2fda897;p=ghc-hetmet.git

diff --git a/ghc/rts/Arena.c b/ghc/rts/Arena.c
index ba6774b..76ac23c 100644
--- a/ghc/rts/Arena.c
+++ b/ghc/rts/Arena.c
@@ -1,5 +1,4 @@
 /* -----------------------------------------------------------------------------
-   $Id: Arena.c,v 1.2 2002/07/17 09:21:49 simonmar Exp $ 
    (c) The University of Glasgow 2001
 
    Arena allocation.  Arenas provide fast memory allocation at the
@@ -53,6 +52,13 @@ newArena( void )
     return arena;
 }
 
+// The minimum alignment of an allocated block.
+#define MIN_ALIGN 8
+
+/* 'n' is assumed to be a power of 2 */
+#define ROUNDUP(x,n)  (((x)+((n)-1))&(~((n)-1)))
+#define B_TO_W(x)     ((x) / sizeof(W_))
+
 // Allocate some memory in an arena
 void  *
 arenaAlloc( Arena *arena, size_t size )
@@ -62,8 +68,11 @@ arenaAlloc( Arena *arena, size_t size )
     nat req_blocks;
     bdescr *bd;
 
-    // round up to word size...
-    size_w = (size + sizeof(W_) - 1) / sizeof(W_);
+    // round up to nearest alignment chunk.
+    size = ROUNDUP(size,MIN_ALIGN);
+
+    // size of allocated block in words.
+    size_w = B_TO_W(size);
 
     if ( arena->free + size_w < arena->lim ) {
 	// enough room in the current block...
@@ -72,7 +81,7 @@ arenaAlloc( Arena *arena, size_t size )
 	return p;
     } else {
 	// allocate a fresh block...
-	req_blocks =  (lnat)BLOCK_ROUND_UP(size_w*sizeof(W_)) / BLOCK_SIZE;
+	req_blocks =  (lnat)BLOCK_ROUND_UP(size) / BLOCK_SIZE;
 	bd = allocGroup(req_blocks);
 	arena_blocks += req_blocks;
 
@@ -100,7 +109,7 @@ arenaFree( Arena *arena )
 	ASSERT(arena_blocks >= 0);
 	freeGroup(bd);
     }
-    free(arena);
+    stgFree(arena);
 }
 
 unsigned long