1 | /* Block a thread with a timeout. Mach version. |
2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <assert.h> |
20 | #include <errno.h> |
21 | #include <time.h> |
22 | #include <sys/time.h> |
23 | |
24 | #include <mach.h> |
25 | #include <mach/message.h> |
26 | |
27 | #include <pt-internal.h> |
28 | |
29 | #ifndef MSG_OPTIONS |
30 | # define MSG_OPTIONS 0 |
31 | #endif |
32 | |
33 | /* Block THREAD. */ |
34 | error_t |
35 | __pthread_timedblock (struct __pthread *thread, |
36 | const struct timespec *abstime, clockid_t clock_id) |
37 | { |
38 | error_t err; |
39 | mach_msg_header_t msg; |
40 | mach_msg_timeout_t timeout; |
41 | struct timespec now; |
42 | |
43 | /* We have an absolute time and now we have to convert it to a |
44 | relative time. Arg. */ |
45 | |
46 | err = __clock_gettime (clock_id, &now); |
47 | assert (!err); |
48 | |
49 | if (now.tv_sec > abstime->tv_sec |
50 | || (now.tv_sec == abstime->tv_sec && now.tv_nsec > abstime->tv_nsec)) |
51 | return ETIMEDOUT; |
52 | |
53 | timeout = (abstime->tv_sec - now.tv_sec) * 1000; |
54 | |
55 | if (abstime->tv_nsec >= now.tv_nsec) |
56 | timeout += (abstime->tv_nsec - now.tv_nsec + 999999) / 1000000; |
57 | else |
58 | /* Need to do a carry. */ |
59 | timeout -= (now.tv_nsec - abstime->tv_nsec + 999999) / 1000000; |
60 | |
61 | err = __mach_msg (&msg, MACH_RCV_MSG | MACH_RCV_TIMEOUT | MSG_OPTIONS, 0, |
62 | sizeof msg, thread->wakeupmsg.msgh_remote_port, |
63 | timeout, MACH_PORT_NULL); |
64 | if (err == EMACH_RCV_TIMED_OUT) |
65 | return ETIMEDOUT; |
66 | if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED) |
67 | return EINTR; |
68 | |
69 | assert_perror (err); |
70 | return 0; |
71 | } |
72 | |