blob: 429183001e6bde2fd6388ec13ca25b79e245bc2a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/* Detach a thread.
Copyright (C) 2000-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <stddef.h>
#include <pt-internal.h>
/* Indicate that the storage for THREAD can be reclaimed when it
terminates. */
int
__pthread_detach (pthread_t thread)
{
struct __pthread *pthread;
int err = 0;
/* Lookup the thread structure for THREAD. */
pthread = __pthread_getid (thread);
if (pthread == NULL)
return ESRCH;
__pthread_mutex_lock (&pthread->state_lock);
switch (pthread->state)
{
case PTHREAD_JOINABLE:
/* THREAD still running. Mark it as detached such that its
resources can be reclaimed as soon as the thread exits. */
pthread->state = PTHREAD_DETACHED;
/* Broadcast the condition. This will make threads that are
waiting to join THREAD continue with hopefully disastrous
consequences instead of blocking indefinitely. */
__pthread_cond_broadcast (&pthread->state_cond);
__pthread_mutex_unlock (&pthread->state_lock);
__pthread_dealloc (pthread);
break;
case PTHREAD_EXITED:
__pthread_mutex_unlock (&pthread->state_lock);
/* THREAD has already exited. PTHREAD remained after the thread
exited in order to provide the exit status, but it turns out
it won't be needed. */
__pthread_dealloc (pthread);
break;
case PTHREAD_TERMINATED:
/* Pretend THREAD wasn't there in the first place. */
__pthread_mutex_unlock (&pthread->state_lock);
err = ESRCH;
break;
default:
/* Thou shalt not detach non-joinable threads! */
__pthread_mutex_unlock (&pthread->state_lock);
err = EINVAL;
break;
}
return err;
}
strong_alias (__pthread_detach, pthread_detach)
|
