libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/libpthread/nptl/pthread_detach.c b/libpthread/nptl/pthread_detach.c
new file mode 100644
index 000000000..1f0c2fe7c
--- /dev/null
+++ b/libpthread/nptl/pthread_detach.c
@@ -0,0 +1,57 @@
+/* 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 (th)
+     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;
+}