nptl/libc-cleanup.c

   1 /* Copyright (C) 2002-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include "pthreadP.h"
  19 #include <tls.h>
  20 #include <libc-lock.h>
  21
  22 void
  23 __libc_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer)
  24 {
  25   struct pthread *self = THREAD_SELF;
  26
  27   buffer->__prev = THREAD_GETMEM (self, cleanup);
  28
  29   /* Disable asynchronous cancellation for now.  */
  30   buffer->__canceltype = THREAD_GETMEM (self, canceltype);
  31   THREAD_SETMEM (self, canceltype, PTHREAD_CANCEL_DEFERRED);
  32
  33   THREAD_SETMEM (self, cleanup, buffer);
  34 }
  35 libc_hidden_def (__libc_cleanup_push_defer)
  36
  37 void
  38 __libc_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer)
  39 {
  40   struct pthread *self = THREAD_SELF;
  41
  42   THREAD_SETMEM (self, cleanup, buffer->__prev);
  43
  44   THREAD_SETMEM (self, canceltype, buffer->__canceltype);
  45   if (buffer->__canceltype == PTHREAD_CANCEL_ASYNCHRONOUS)
  46       __pthread_testcancel ();
  47 }
  48 libc_hidden_def (__libc_cleanup_pop_restore)