From 90cec78b40ba0f409d109c2af3a2a9062663d015 Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Wed, 12 Feb 1997 17:23:13 +0000
Subject: (_pager_pagemap_resize):   Return errors.

---
 libpager/pagemap.c | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

(limited to 'libpager')

diff --git a/libpager/pagemap.c b/libpager/pagemap.c
index 2adbcc0e..9fefc63f 100644
--- a/libpager/pagemap.c
+++ b/libpager/pagemap.c
@@ -1,5 +1,5 @@
 /* Pagemap manipulation for pager library
-   Copyright (C) 1994 Free Software Foundation
+   Copyright (C) 1994, 1997 Free Software Foundation
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
@@ -19,21 +19,27 @@
 #include <string.h>
   
 /* Grow the pagemap of pager P as necessary to deal with address OFF */
-void
-_pager_pagemap_resize (struct pager *p,
-		       vm_address_t off)
+error_t
+_pager_pagemap_resize (struct pager *p, vm_address_t off)
 {
-  void *newaddr;
-  int newsize;
+  error_t err = 0;
   
   off /= __vm_page_size;
-  if (p->pagemapsize >= off)
-    return;
-  
-  newsize = round_page (off);
-  vm_allocate (mach_task_self (), (u_int *)&newaddr, newsize, 1);
-  bcopy (p->pagemap, newaddr, p->pagemapsize);
-  vm_deallocate (mach_task_self (), (u_int)p->pagemap, p->pagemapsize);
-  p->pagemap = newaddr;
-  p->pagemapsize = newsize;
+
+  if (p->pagemapsize < off)
+    {
+      void *newaddr;
+      int newsize = round_page (off);
+
+      err = vm_allocate (mach_task_self (), (u_int *)&newaddr, newsize, 1);
+      if (! err)
+	{
+	  bcopy (p->pagemap, newaddr, p->pagemapsize);
+	  vm_deallocate (mach_task_self (), (u_int)p->pagemap, p->pagemapsize);
+	  p->pagemap = newaddr;
+	  p->pagemapsize = newsize;
+	}
+    }
+
+  return err;
 }
-- 
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