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28f540f4 RM |
1 | /* |
2 | * Mach Operating System | |
3 | * Copyright (c) 1991,1990,1989, 1995 Carnegie Mellon University | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission to use, copy, modify and distribute this software and its | |
7 | * documentation is hereby granted, provided that both the copyright | |
8 | * notice and this permission notice appear in all copies of the | |
9 | * software, derivative works or modified versions, and any portions | |
10 | * thereof, and that both notices appear in supporting documentation. | |
11 | * | |
12 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
13 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
14 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
15 | * | |
16 | * Carnegie Mellon requests users of this software to return to | |
17 | * | |
18 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
19 | * School of Computer Science | |
20 | * Carnegie Mellon University | |
21 | * Pittsburgh PA 15213-3890 | |
22 | * | |
23 | * any improvements or extensions that they make and grant Carnegie Mellon | |
24 | * the rights to redistribute these changes. | |
25 | */ | |
26 | #include <mach/port.h> | |
27 | #include <mach/message.h> | |
28 | ||
29 | mach_msg_return_t | |
30 | __mach_msg (mach_msg_header_t *msg, | |
31 | mach_msg_option_t option, | |
32 | mach_msg_size_t send_size, | |
33 | mach_msg_size_t rcv_size, | |
34 | mach_port_t rcv_name, | |
35 | mach_msg_timeout_t timeout, | |
36 | mach_port_t notify) | |
37 | { | |
38 | mach_msg_return_t ret; | |
39 | ||
40 | /* Consider the following cases: | |
41 | 1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED | |
42 | plus special bits). | |
43 | 2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options. | |
44 | 3. RPC calls with interruptions in one/both halves. | |
45 | */ | |
46 | ||
47 | ret = __mach_msg_trap (msg, option, send_size, | |
48 | rcv_size, rcv_name, timeout, notify); | |
49 | if (ret == MACH_MSG_SUCCESS) | |
50 | return MACH_MSG_SUCCESS; | |
51 | ||
52 | if (!(option & MACH_SEND_INTERRUPT)) | |
53 | while (ret == MACH_SEND_INTERRUPTED) | |
54 | ret = __mach_msg_trap (msg, option, send_size, | |
55 | rcv_size, rcv_name, timeout, notify); | |
56 | ||
57 | if (!(option & MACH_RCV_INTERRUPT)) | |
58 | while (ret == MACH_RCV_INTERRUPTED) | |
59 | ret = __mach_msg_trap (msg, option & ~MACH_SEND_MSG, | |
60 | 0, rcv_size, rcv_name, timeout, notify); | |
61 | ||
62 | return ret; | |
63 | } | |
64 | weak_alias (__mach_msg, mach_msg) | |
65 | ||
66 | mach_msg_return_t | |
67 | __mach_msg_send (mach_msg_header_t *msg) | |
68 | { | |
69 | return __mach_msg (msg, MACH_SEND_MSG, | |
70 | msg->msgh_size, 0, MACH_PORT_NULL, | |
71 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
72 | } | |
73 | weak_alias (__mach_msg_send, mach_msg_send) | |
74 | ||
75 | mach_msg_return_t | |
76 | __mach_msg_receive (mach_msg_header_t *msg) | |
77 | { | |
78 | return __mach_msg (msg, MACH_RCV_MSG, | |
79 | 0, msg->msgh_size, msg->msgh_local_port, | |
80 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
81 | } | |
82 | weak_alias (__mach_msg_receive, mach_msg_receive) |