1 /* Start 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 #include <mach.h>
22 
23 #include <pt-internal.h>
24 
25 /* Start THREAD.  Get the kernel thread scheduled and running.  */
26 int
__pthread_thread_start(struct __pthread * thread)27 __pthread_thread_start (struct __pthread *thread)
28 {
29   static int do_start;
30   error_t err;
31 
32   if (!do_start)
33     {
34       /* The main thread is already running: do nothing.  */
35       assert (__pthread_total == 1);
36       assert ((
37 		{
38 		  mach_port_t ktid = __mach_thread_self ();
39 		  int ok = thread->kernel_thread == ktid;
40 		  __mach_port_deallocate (__mach_task_self (),
41 					  thread->kernel_thread);
42 		  ok;
43 		}));
44       do_start = 1;
45     }
46   else
47     {
48       err = __thread_resume (thread->kernel_thread);
49       assert_perror (err);
50     }
51 
52   return 0;
53 }
54