nptl/libc-cleanup.c

   1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 "pthreadP.h"
  20 #include <tls.h>
  21 #include <libc-lock.h>
  22
  23 void
  24 __libc_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer)
  25 {
  26   struct pthread *self = THREAD_SELF;
  27
  28   buffer->__prev = THREAD_GETMEM (self, cleanup);
  29
  30   /* Disable asynchronous cancellation for now.  */
  31   buffer->__canceltype = THREAD_GETMEM (self, canceltype);
  32   THREAD_SETMEM (self, canceltype, PTHREAD_CANCEL_DEFERRED);
  33
  34   THREAD_SETMEM (self, cleanup, buffer);
  35 }
  36 libc_hidden_def (__libc_cleanup_push_defer)
  37
  38 void
  39 __libc_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer)
  40 {
  41   struct pthread *self = THREAD_SELF;
  42
  43   THREAD_SETMEM (self, cleanup, buffer->__prev);
  44
  45   THREAD_SETMEM (self, canceltype, buffer->__canceltype);
  46   if (buffer->__canceltype == PTHREAD_CANCEL_ASYNCHRONOUS)
  47       __pthread_testcancel ();
  48 }
  49 libc_hidden_def (__libc_cleanup_pop_restore)