mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
8c86ba4463
If any RPC fails, the reply port will already be deallocated. __pthread_thread_terminate thus has to defer taking its name until the very last __thread_terminate_release which doesn't reply a message. But then we have to read from the pthread structure. This introduces __pthread_dealloc_finish() which does the recording of the thread termination, so the slot can be reused really only just before the __thread_terminate_release call. Only the real thread can set it, so let's decouple this from the pthread_state by just removing the PTHREAD_TERMINATED state and add a terminated field.
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Detach a thread.
|
|
Copyright (C) 2000-2022 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
|
|
<https://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;
|
|
|
|
default:
|
|
/* Thou shalt not detach non-joinable threads! */
|
|
__pthread_mutex_unlock (&pthread->state_lock);
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
weak_alias (__pthread_detach, pthread_detach)
|
|
hidden_def (__pthread_detach)
|