1 /*
2 * Copyright (c) 2019 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 #include <mach/boolean.h>
30 #include <mach/message.h>
31 #include <mach/kern_return.h>
32 #include <mach/mach_traps.h>
33 #include <mach/mach_types.h>
34 #include <mach/clock_types.h>
35 #include <mach/mach_eventlink_types.h>
36
37 /*
38 * __mach_eventlink* calls are bsd syscalls instead of mach traps because
39 * they need to return a 64 bit value in register and mach traps currently
40 * does not allow 64 bit return values.
41 */
42 uint64_t
43 __mach_eventlink_signal(
44 mach_port_t eventlink_port,
45 uint64_t signal_count);
46
47 uint64_t
48 __mach_eventlink_wait_until(
49 mach_port_t eventlink_port,
50 uint64_t wait_signal_count,
51 uint64_t deadline,
52 kern_clock_id_t clock_id,
53 mach_eventlink_signal_wait_option_t option);
54
55 uint64_t
56 __mach_eventlink_signal_wait_until(
57 mach_port_t eventlink_port,
58 uint64_t wait_count,
59 uint64_t signal_count,
60 uint64_t deadline,
61 kern_clock_id_t clock_id,
62 mach_eventlink_signal_wait_option_t option);
63
64 kern_return_t
mach_eventlink_signal(mach_port_t eventlink_port,uint64_t signal_count)65 mach_eventlink_signal(
66 mach_port_t eventlink_port,
67 uint64_t signal_count)
68 {
69 uint64_t retval = __mach_eventlink_signal(eventlink_port, signal_count);
70
71 return decode_eventlink_error_from_retval(retval);
72 }
73
74 kern_return_t
mach_eventlink_wait_until(mach_port_t eventlink_port,uint64_t * wait_count_ptr,mach_eventlink_signal_wait_option_t option,kern_clock_id_t clock_id,uint64_t deadline)75 mach_eventlink_wait_until(
76 mach_port_t eventlink_port,
77 uint64_t *wait_count_ptr,
78 mach_eventlink_signal_wait_option_t option,
79 kern_clock_id_t clock_id,
80 uint64_t deadline)
81 {
82 uint64_t retval;
83
84 retval = __mach_eventlink_wait_until(eventlink_port, *wait_count_ptr,
85 deadline, clock_id, option);
86
87 *wait_count_ptr = decode_eventlink_count_from_retval(retval);
88 return decode_eventlink_error_from_retval(retval);
89 }
90
91 kern_return_t
mach_eventlink_signal_wait_until(mach_port_t eventlink_port,uint64_t * wait_count_ptr,uint64_t signal_count,mach_eventlink_signal_wait_option_t option,kern_clock_id_t clock_id,uint64_t deadline)92 mach_eventlink_signal_wait_until(
93 mach_port_t eventlink_port,
94 uint64_t *wait_count_ptr,
95 uint64_t signal_count,
96 mach_eventlink_signal_wait_option_t option,
97 kern_clock_id_t clock_id,
98 uint64_t deadline)
99 {
100 uint64_t retval;
101 retval = __mach_eventlink_signal_wait_until(eventlink_port, *wait_count_ptr,
102 signal_count, deadline, clock_id, option);
103 *wait_count_ptr = decode_eventlink_count_from_retval(retval);
104 return decode_eventlink_error_from_retval(retval);
105 }
106