entered into RCS
authorroland <roland>
Sat, 19 Oct 1991 01:15:40 +0000 (01:15 +0000)
committerroland <roland>
Sat, 19 Oct 1991 01:15:40 +0000 (01:15 +0000)
mach/msg.c [new file with mode: 0644]

diff --git a/mach/msg.c b/mach/msg.c
new file mode 100644 (file)
index 0000000..350ee27
--- /dev/null
@@ -0,0 +1,79 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+#include <mach/port.h>
+#include <mach/message.h>
+
+mach_msg_return_t
+__mach_msg (mach_msg_header_t *msg,
+           mach_msg_option_t option,
+           mach_msg_size_t send_size,
+           mach_msg_size_t rcv_size,
+           mach_port_t rcv_name,
+           mach_msg_timeout_t timeout,
+           mach_port_t notify)
+{
+  mach_msg_return_t ret;
+  
+  /* Consider the following cases:
+     1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED
+     plus special bits).
+     2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options.
+     3. RPC calls with interruptions in one/both halves.
+     */
+  
+  ret = __mach_msg_trap (msg, option, send_size,
+                        rcv_size, rcv_name, timeout, notify);
+  if (ret == MACH_MSG_SUCCESS)
+    return MACH_MSG_SUCCESS;
+  
+  if (!(option & MACH_SEND_INTERRUPT))
+    while (ret == MACH_SEND_INTERRUPTED)
+      ret = __mach_msg_trap (msg, option, send_size,
+                            rcv_size, rcv_name, timeout, notify);
+  
+  if (!(option & MACH_RCV_INTERRUPT))
+    while (ret == MACH_RCV_INTERRUPTED)
+      ret = __mach_msg_trap (msg, option & ~MACH_SEND_MSG,
+                            0, rcv_size, rcv_name, timeout, notify);
+  
+  return ret;
+}
+
+mach_msg_return_t
+__mach_msg_send        (mach_msg_header_t *msg)
+{
+  return __mach_msg (msg, MACH_SEND_MSG,
+                    msg->msgh_size, 0, MACH_PORT_NULL,
+                    MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+}
+
+mach_msg_return_t
+__mach_msg_receive (mach_msg_header_t *msg)
+{
+  return __mach_msg (msg, MACH_RCV_MSG,
+                    0, msg->msgh_size, msg->msgh_local_port,
+                    MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+}