projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 33574c17 | 1 | /* Detach a thread. |
| 04277e02 | 2 | Copyright (C) 2000-2019 Free Software Foundation, Inc. |
| 33574c17 ST |
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 | |
| ad2b41bf ST |
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. | |
| 33574c17 ST |
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 | |
| ad2b41bf | 13 | Lesser General Public License for more details. |
| 33574c17 | 14 | |
| ad2b41bf ST |
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 | <http://www.gnu.org/licenses/>. */ | |
| 33574c17 ST |
18 | |
| 19 | #include <errno.h> | |
| 20 | #include <pthread.h> | |
| 21 | #include <stddef.h> | |
| 22 | ||
| 23 | #include <pt-internal.h> | |
| 24 | ||
| 25 | /* Indicate that the storage for THREAD can be reclaimed when it | |
| 26 | terminates. */ | |
| 27 | int | |
| f6fb29d2 | 28 | __pthread_detach (pthread_t thread) |
| 33574c17 ST |
29 | { |
| 30 | struct __pthread *pthread; | |
| 31 | int err = 0; | |
| 32 | ||
| 33 | /* Lookup the thread structure for THREAD. */ | |
| 34 | pthread = __pthread_getid (thread); | |
| 35 | if (pthread == NULL) | |
| 36 | return ESRCH; | |
| 37 | ||
| 38 | __pthread_mutex_lock (&pthread->state_lock); | |
| 39 | ||
| 40 | switch (pthread->state) | |
| 41 | { | |
| 42 | case PTHREAD_JOINABLE: | |
| 43 | /* THREAD still running. Mark it as detached such that its | |
| 44 | resources can be reclaimed as soon as the thread exits. */ | |
| 45 | pthread->state = PTHREAD_DETACHED; | |
| 46 | ||
| 47 | /* Broadcast the condition. This will make threads that are | |
| 48 | waiting to join THREAD continue with hopefully disastrous | |
| 49 | consequences instead of blocking indefinitely. */ | |
| f6fb29d2 | 50 | __pthread_cond_broadcast (&pthread->state_cond); |
| 33574c17 ST |
51 | __pthread_mutex_unlock (&pthread->state_lock); |
| 52 | ||
| 53 | __pthread_dealloc (pthread); | |
| 54 | break; | |
| 55 | ||
| 56 | case PTHREAD_EXITED: | |
| 57 | __pthread_mutex_unlock (&pthread->state_lock); | |
| 58 | ||
| 59 | /* THREAD has already exited. PTHREAD remained after the thread | |
| 60 | exited in order to provide the exit status, but it turns out | |
| 61 | it won't be needed. */ | |
| 62 | __pthread_dealloc (pthread); | |
| 63 | break; | |
| 64 | ||
| 65 | case PTHREAD_TERMINATED: | |
| 66 | /* Pretend THREAD wasn't there in the first place. */ | |
| 67 | __pthread_mutex_unlock (&pthread->state_lock); | |
| 68 | err = ESRCH; | |
| 69 | break; | |
| 70 | ||
| 71 | default: | |
| 72 | /* Thou shalt not detach non-joinable threads! */ | |
| 73 | __pthread_mutex_unlock (&pthread->state_lock); | |
| 74 | err = EINVAL; | |
| 75 | break; | |
| 76 | } | |
| 77 | ||
| 78 | return err; | |
| 79 | } | |
| f6fb29d2 | 80 | strong_alias (__pthread_detach, pthread_detach) |