1 /* Block a thread. 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
22 #include <mach.h>
23 #include <mach/message.h>
24
25 #include <pt-internal.h>
26
27 #ifndef MSG_OPTIONS
28 # define MSG_OPTIONS 0
29 #endif
30
31 #ifndef RETTYPE
32 # define RETTYPE void
33 #endif
34
35 #ifndef RETURN
36 # define RETURN(val)
37 #endif
38
39 /* Block THREAD. */
40 RETTYPE
__pthread_block(struct __pthread * thread)41 __pthread_block (struct __pthread *thread)
42 {
43 mach_msg_header_t msg;
44 error_t err;
45
46 err = __mach_msg (&msg, MACH_RCV_MSG | MSG_OPTIONS, 0, sizeof msg,
47 thread->wakeupmsg.msgh_remote_port,
48 MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
49 if ((MSG_OPTIONS & MACH_RCV_INTERRUPT) && err == MACH_RCV_INTERRUPTED)
50 RETURN(EINTR);
51 assert_perror (err);
52 RETURN(0);
53 }
54