Initial checkin.

1 files changed, 56 insertions, 0 deletions

diff --git a/empty.c b/empty.c
new file mode 100644
index 0000000..3adc8fa
--- /dev/null
+++ b/empty.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2014 Justus Winter <4winter@informatik.uni-hamburg.de>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define _GNU_SOURCE
+#include <hurd.h>
+#include <error.h>
+#include <mach.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static mach_msg_header_t send_buffer = {
+  .msgh_bits = MACH_MSGH_BITS_REMOTE(MACH_MSG_TYPE_MAKE_SEND),
+};
+
+error_t
+send_empty (mach_port_t server)
+{
+  send_buffer.msgh_remote_port = server;
+
+  return mach_msg (&send_buffer,
+		   MACH_SEND_MSG|MACH_MSG_OPTION_NONE,
+		   sizeof (send_buffer),
+		   0,
+		   MACH_PORT_NULL,
+		   MACH_MSG_TIMEOUT_NONE,
+		   MACH_PORT_NULL);
+}
+
+static mach_msg_header_t receive_buffer = {
+  .msgh_size = sizeof (receive_buffer),
+};
+
+error_t
+receive_empty (mach_port_t port)
+{
+  return mach_msg (&receive_buffer,
+		   MACH_RCV_MSG|MACH_MSG_OPTION_NONE,
+		   0,
+		   sizeof (receive_buffer),
+		   port,
+		   MACH_MSG_TIMEOUT_NONE,
+		   MACH_PORT_NULL);
+}