[Patch] - for memory.c

[David Jacobs]

This small patch cleans up two things with the allocate aligned memory routine.  It 
cleans up the for loop eliminating the need for the bit operations inside and making 
it a bit clearer what is happening.  It also reduces the memory allocated from twice 
the rounded up power of two to the rounded up power of two plus the requested size.

Let me know if you like it.

David Jacobs

--- parrot-0.0.3/memory.c Sat Oct 13 14:43:50 2001
+++ parrot/memory.c Sat Dec  8 18:25:34 2001
@@ -47,19 +47,13 @@
     
     /* Okay, we just brute-force things here. Yeah it's stupid, but it
        works */
-    for (i = 1; i < 0xffffff; i <<= 1) {
-        if (size > i) {
-            mask = ~(i*2 - 1);
-            max_to_alloc = i*4;
-        }
-        else {
-            break;
-        }
-    }
+    for (i = 1; size > i; i <<= 1);
+    mask = ~(i - 1);
+    max_to_alloc = i + size;
     
     mem = malloc(max_to_alloc);
     if (((ptrcast_t)mem & mask) < (ptrcast_t)mem) {
-        mem = (void *)(((ptrcast_t)mem & mask) + ~mask + 1);
+        mem = (void *)(((ptrcast_t)mem & mask) + i);
     } 
     return mem;
 }