Alexandre Julliard : ntdll: Go back to growing the heap in smaller increments once we start running out of address space .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 5f2300644179869556439dcf4d988285d01cfd20
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=5f2300644179869556439dcf4d...

Author: Alexandre Julliard 
Date:   Tue Jun 30 14:07:18 2009 +0200

ntdll: Go back to growing the heap in smaller increments once we start running out of address space.

---

dlls/ntdll/heap.c |   17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c
index 06490ba..23c0ca2 100644
--- a/dlls/ntdll/heap.c
+++ b/dlls/ntdll/heap.c
@@ -927,11 +927,18 @@ static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, SIZE_T size,
     total_size = size + ROUND_SIZE(sizeof(SUBHEAP)) + sizeof(ARENA_INUSE) + sizeof(ARENA_FREE);
     if (total_size < size) return NULL;  /* overflow */

-    if (!(subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, total_size,
-                                        max( heap->grow_size, total_size ) )))
-        return NULL;
-
-    if (heap->grow_size < 128 * 1024 * 1024) heap->grow_size *= 2;
+    if ((subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, total_size,
+                                       max( heap->grow_size, total_size ) )))
+    {
+        if (heap->grow_size < 128 * 1024 * 1024) heap->grow_size *= 2;
+    }
+    else while (!subheap)  /* shrink the grow size again if we are running out of space */
+    {
+        if (heap->grow_size <= total_size || heap->grow_size <= 4 * 1024 * 1024) return NULL;
+        heap->grow_size /= 2;
+        subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, total_size,
+                                      max( heap->grow_size, total_size ) );
+    }

TRACE("created new sub-heap %p of %08lx bytes for heap %p\n",
           subheap, subheap->size, heap );