nptl: Move __free_tcb into libc

Under the name __nptl_free_tcb.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/nptl/nptl_free_tcb.c b/nptl/nptl_free_tcb.c
new file mode 100644
index 0000000000..cbf3580f59
--- /dev/null
+++ b/nptl/nptl_free_tcb.c
@@ -0,0 +1,45 @@
+/* TCB deallocation for NPTL.
+   Copyright (C) 2002-2021 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, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <nptl-stack.h>
+#include <pthreadP.h>
+#include <stdlib.h>
+
+void
+__nptl_free_tcb (struct pthread *pd)
+{
+  /* The thread is exiting now.  */
+  if (atomic_bit_test_set (&pd->cancelhandling, TERMINATED_BIT) == 0)
+    {
+      /* Free TPP data.  */
+      if (pd->tpp != NULL)
+        {
+          struct priority_protection_data *tpp = pd->tpp;
+
+          pd->tpp = NULL;
+          free (tpp);
+        }
+
+      /* Queue the stack memory block for reuse and exit the process.  The
+         kernel will signal via writing to the address returned by
+         QUEUE-STACK when the stack is available.  */
+      __nptl_deallocate_stack (pd);
+    }
+}
+libc_hidden_def (__nptl_free_tcb)