1 files changed, 40 insertions, 0 deletions
diff --git a/libports/interrupt-operation.c b/libports/interrupt-operation.c
new file mode 100644
index 00000000..1545f788
--- /dev/null
+++ b/libports/interrupt-operation.c
@@ -0,0 +1,40 @@
+/* interrupt_operation
+
+   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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 "ports.h"
+#include "interrupt_S.h"
+
+/* Cause a pending request on this object to immediately return.  The
+   exact semantics are dependent on the specific object.  */
+kern_return_t
+ports_S_interrupt_operation (mach_port_t port,
+			     mach_port_seqno_t seqno)
+{
+  struct port_info *pi = ports_lookup_port (0, port, 0);
+  if (!pi)
+    return EOPNOTSUPP;
+  mutex_lock (&_ports_lock);
+  if (pi->cancel_threshold < seqno)
+    pi->cancel_threshold = seqno;
+  mutex_unlock (&_ports_lock);
+  ports_interrupt_rpcs (pi);
+  ports_port_deref (pi);
+  return 0;
+}