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-rw-r--r--libpthread/nptl/pthread_detach.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_detach.c b/libpthread/nptl/pthread_detach.c
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+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include "pthreadP.h"
+#include <atomic.h>
+
+
+int
+pthread_detach (pthread_t th)
+{
+ struct pthread *pd = (struct pthread *) th;
+
+ /* Make sure the descriptor is valid. */
+ if (INVALID_NOT_TERMINATED_TD_P (pd))
+ /* Not a valid thread handle. */
+ return ESRCH;
+
+ int result = 0;
+
+ /* Mark the thread as detached. */
+ if (atomic_compare_and_exchange_bool_acq (&pd->joinid, pd, NULL))
+ {
+ /* There are two possibilities here. First, the thread might
+ already be detached. In this case we return EINVAL.
+ Otherwise there might already be a waiter. The standard does
+ not mention what happens in this case. */
+ if (IS_DETACHED (pd))
+ result = EINVAL;
+ }
+ else
+ /* Check whether the thread terminated meanwhile. In this case we
+ will just free the TCB. */
+ if ((pd->cancelhandling & EXITING_BITMASK) != 0)
+ /* Note that the code in __free_tcb makes sure each thread
+ control block is freed only once. */
+ __free_tcb (pd);
+
+ return result;
+}