]>
Commit | Line | Data |
---|---|---|
3a2832a0 | 1 | /* |
28f540f4 RM |
2 | * Mach Operating System |
3 | * Copyright (c) 1991,1990,1989, 1995 Carnegie Mellon University | |
4 | * All Rights Reserved. | |
3a2832a0 | 5 | * |
28f540f4 RM |
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. | |
3a2832a0 | 11 | * |
28f540f4 RM |
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. | |
3a2832a0 | 15 | * |
28f540f4 | 16 | * Carnegie Mellon requests users of this software to return to |
3a2832a0 | 17 | * |
28f540f4 RM |
18 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
19 | * School of Computer Science | |
20 | * Carnegie Mellon University | |
21 | * Pittsburgh PA 15213-3890 | |
3a2832a0 | 22 | * |
28f540f4 RM |
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> | |
7a646a93 | 28 | #include <mach.h> |
28f540f4 | 29 | |
3a2832a0 RM |
30 | #ifdef MACH_MSG_OVERWRITE |
31 | /* In variants with this feature, the actual system call is | |
32 | __mach_msg_overwrite_trap. */ | |
33 | mach_msg_return_t | |
34 | __mach_msg_trap (mach_msg_header_t *msg, | |
35 | mach_msg_option_t option, | |
36 | mach_msg_size_t send_size, | |
37 | mach_msg_size_t rcv_size, | |
38 | mach_port_t rcv_name, | |
39 | mach_msg_timeout_t timeout, | |
40 | mach_port_t notify) | |
41 | { | |
42 | return __mach_msg_overwrite_trap (msg, option, send_size, | |
43 | rcv_size, rcv_name, timeout, notify, | |
44 | MACH_MSG_NULL, 0); | |
45 | } | |
46 | weak_alias (__mach_msg_trap, mach_msg_trap) | |
47 | ||
48 | /* See comments below in __mach_msg. */ | |
49 | mach_msg_return_t | |
50 | __mach_msg_overwrite (mach_msg_header_t *msg, | |
51 | mach_msg_option_t option, | |
52 | mach_msg_size_t send_size, | |
53 | mach_msg_size_t rcv_size, | |
54 | mach_port_t rcv_name, | |
55 | mach_msg_timeout_t timeout, | |
56 | mach_port_t notify, | |
57 | mach_msg_header_t *rcv_msg, | |
58 | mach_msg_size_t rcv_msg_size) | |
59 | ||
60 | { | |
61 | mach_msg_return_t ret; | |
62 | ||
63 | /* Consider the following cases: | |
64 | 1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED | |
65 | plus special bits). | |
66 | 2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options. | |
67 | 3. RPC calls with interruptions in one/both halves. | |
68 | */ | |
69 | ||
70 | ret = __mach_msg_overwrite_trap (msg, option, send_size, | |
71 | rcv_size, rcv_name, timeout, notify, | |
72 | rcv_msg, rcv_msg_size); | |
73 | if (ret == MACH_MSG_SUCCESS) | |
74 | return MACH_MSG_SUCCESS; | |
75 | ||
76 | if (!(option & MACH_SEND_INTERRUPT)) | |
77 | while (ret == MACH_SEND_INTERRUPTED) | |
78 | ret = __mach_msg_overwrite_trap (msg, option, send_size, | |
79 | rcv_size, rcv_name, timeout, notify, | |
80 | rcv_msg, rcv_msg_size); | |
81 | ||
82 | if (!(option & MACH_RCV_INTERRUPT)) | |
83 | while (ret == MACH_RCV_INTERRUPTED) | |
84 | ret = __mach_msg_overwrite_trap (msg, option & ~MACH_SEND_MSG, | |
85 | 0, rcv_size, rcv_name, timeout, notify, | |
86 | rcv_msg, rcv_msg_size); | |
87 | ||
88 | return ret; | |
89 | } | |
90 | weak_alias (__mach_msg_overwrite, mach_msg_overwrite) | |
91 | #endif | |
92 | ||
28f540f4 RM |
93 | mach_msg_return_t |
94 | __mach_msg (mach_msg_header_t *msg, | |
95 | mach_msg_option_t option, | |
96 | mach_msg_size_t send_size, | |
97 | mach_msg_size_t rcv_size, | |
98 | mach_port_t rcv_name, | |
99 | mach_msg_timeout_t timeout, | |
100 | mach_port_t notify) | |
101 | { | |
102 | mach_msg_return_t ret; | |
3a2832a0 | 103 | |
28f540f4 RM |
104 | /* Consider the following cases: |
105 | 1. Errors in pseudo-receive (eg, MACH_SEND_INTERRUPTED | |
106 | plus special bits). | |
107 | 2. Use of MACH_SEND_INTERRUPT/MACH_RCV_INTERRUPT options. | |
108 | 3. RPC calls with interruptions in one/both halves. | |
109 | */ | |
3a2832a0 | 110 | |
28f540f4 RM |
111 | ret = __mach_msg_trap (msg, option, send_size, |
112 | rcv_size, rcv_name, timeout, notify); | |
113 | if (ret == MACH_MSG_SUCCESS) | |
114 | return MACH_MSG_SUCCESS; | |
3a2832a0 | 115 | |
28f540f4 RM |
116 | if (!(option & MACH_SEND_INTERRUPT)) |
117 | while (ret == MACH_SEND_INTERRUPTED) | |
118 | ret = __mach_msg_trap (msg, option, send_size, | |
119 | rcv_size, rcv_name, timeout, notify); | |
3a2832a0 | 120 | |
28f540f4 RM |
121 | if (!(option & MACH_RCV_INTERRUPT)) |
122 | while (ret == MACH_RCV_INTERRUPTED) | |
123 | ret = __mach_msg_trap (msg, option & ~MACH_SEND_MSG, | |
124 | 0, rcv_size, rcv_name, timeout, notify); | |
3a2832a0 | 125 | |
28f540f4 RM |
126 | return ret; |
127 | } | |
128 | weak_alias (__mach_msg, mach_msg) | |
7a646a93 | 129 | libc_hidden_def (__mach_msg) |
28f540f4 RM |
130 | |
131 | mach_msg_return_t | |
132 | __mach_msg_send (mach_msg_header_t *msg) | |
133 | { | |
134 | return __mach_msg (msg, MACH_SEND_MSG, | |
135 | msg->msgh_size, 0, MACH_PORT_NULL, | |
136 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
137 | } | |
138 | weak_alias (__mach_msg_send, mach_msg_send) | |
139 | ||
140 | mach_msg_return_t | |
141 | __mach_msg_receive (mach_msg_header_t *msg) | |
142 | { | |
143 | return __mach_msg (msg, MACH_RCV_MSG, | |
144 | 0, msg->msgh_size, msg->msgh_local_port, | |
145 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
146 | } | |
147 | weak_alias (__mach_msg_receive, mach_msg_receive) |