1  /* TCB deallocation for NPTL.
       2     Copyright (C) 2002-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <nptl-stack.h>
      20  #include <pthreadP.h>
      21  #include <stdlib.h>
      22  
      23  void
      24  __nptl_free_tcb (struct pthread *pd)
      25  {
      26    /* The thread is exiting now.  */
      27    if ((atomic_fetch_or_relaxed (&pd->cancelhandling, TERMINATED_BITMASK)
      28        & TERMINATED_BITMASK) == 0)
      29      {
      30        /* Free TPP data.  */
      31        if (pd->tpp != NULL)
      32          {
      33            struct priority_protection_data *tpp = pd->tpp;
      34  
      35            pd->tpp = NULL;
      36            free (tpp);
      37          }
      38  
      39        /* Queue the stack memory block for reuse and exit the process.  The
      40           kernel will signal via writing to the address returned by
      41           QUEUE-STACK when the stack is available.  */
      42        __nptl_deallocate_stack (pd);
      43      }
      44  }
      45  libc_hidden_def (__nptl_free_tcb)