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-rw-r--r--htl/pt-detach.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/htl/pt-detach.c b/htl/pt-detach.c
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+++ b/htl/pt-detach.c
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+/* Detach a thread.
+ Copyright (C) 2000-2018 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)