Initial revision

1 files changed, 54 insertions, 0 deletions

diff --git a/libpager/chg-compl.c b/libpager/chg-compl.c
new file mode 100644
index 00000000..877a6f4d
--- /dev/null
+++ b/libpager/chg-compl.c
@@ -0,0 +1,54 @@
+/* Completion of memory_object_change_attributes
+   Copyright (C) 1994 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
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* The kernel calls this (as described in <mach/memory_object.defs>)
+   when a memory_object_change_attributes call has completed.  Read this
+   in combination with pager-attr.c.  */
+kern_return_t
+_pager_seqnos_memory_object_change_completed (mach_port_t obj,
+				       mach_port_seqno_t seq,
+				       boolean_t maycache,
+				       memory_object_copy_strategy_t strat)
+{
+  struct pager *p;
+  struct attribute_request *ar;
+  int wakeup;
+  
+
+  if (!(p = ports_check_port_type (obj, pager_port_type)))
+    {
+      printf ("Bad change completed\n");
+      return EOPNOTSUPP;
+    }
+  
+  mutex_lock (&p->interlock);
+  _pager_wait_for_seqno (p, seq);
+
+  for (ar = p->attribute_requests; ar; ar = ar->next)
+    if (ar->may_cache == maycache && ar->copy_strategy == strat
+	&& !--ar->attrs_pending)
+      break;
+  
+  if (ar)
+    condition_broadcast (&p->wakeup);
+  
+  _pager_release_seqno (p);
+  mutex_unlock (&p->interlock);
+  return 0;
+}
+
+