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-rw-r--r--mach/msg.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/mach/msg.c b/mach/msg.c
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+++ b/mach/msg.c
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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989, 1995 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;
+}
+weak_alias (__mach_msg, mach_msg)
+
+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);
+}
+weak_alias (__mach_msg_send, mach_msg_send)
+
+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);
+}
+weak_alias (__mach_msg_receive, mach_msg_receive)