1 files changed, 59 insertions, 0 deletions
diff --git a/libtrivfs/protid-clean.c b/libtrivfs/protid-clean.c
new file mode 100644
index 00000000..86fbc191
--- /dev/null
+++ b/libtrivfs/protid-clean.c
@@ -0,0 +1,59 @@
+/* 
+   Copyright (C) 1994, 1995, 1996 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. */
+
+#include "priv.h"
+
+/* Clean pointers in a struct trivfs_protid when its last reference vanishes
+   before it's freed.  */
+void
+trivfs_clean_protid (void *arg)
+{
+  struct trivfs_protid *cred = arg;
+  struct trivfs_control *cntl = cred->po->cntl;
+
+  if (trivfs_protid_destroy_hook && cred->realnode != MACH_PORT_NULL)
+    /* Allow the user to clean up; If the realnode field is null, then CRED
+       wasn't initialized to the point of needing user cleanup.  */
+    (*trivfs_protid_destroy_hook) (cred);
+
+  /* If we hold the only reference to the peropen, try to get rid of it. */
+  if (trivfs_peropen_destroy_hook)
+    {
+      if (refcount_deref (&cred->po->refcnt) == 0)
+        {
+          /* Reaquire a reference while we call the hook.  */
+          refcount_ref (&cred->po->refcnt);
+          (*trivfs_peropen_destroy_hook) (cred->po);
+          if (refcount_deref (&cred->po->refcnt) == 0)
+            {
+              ports_port_deref (cntl);
+              free (cred->po);
+            }
+        }
+    }
+  else
+    if (refcount_deref (&cred->po->refcnt) == 0)
+      {
+        ports_port_deref (cntl);
+        free (cred->po);
+      }
+
+  iohelp_free_iouser (cred->user);
+
+  if (cred->realnode != MACH_PORT_NULL)
+    mach_port_deallocate (mach_task_self (), cred->realnode);
+}