nptl/pthread_setcanceltype.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 <errno.h>
  19 #include "pthreadP.h"
  20 #include <atomic.h>
  21
  22
  23 int
  24 __pthread_setcanceltype (int type, int *oldtype)
  25 {
  26   if (type < PTHREAD_CANCEL_DEFERRED || type > PTHREAD_CANCEL_ASYNCHRONOUS)
  27     return EINVAL;
  28
  29   volatile struct pthread *self = THREAD_SELF;
  30
  31   if (oldtype != NULL)
  32     *oldtype = self->canceltype;
  33   self->canceltype = type;
  34   if (type == PTHREAD_CANCEL_ASYNCHRONOUS)
  35     __pthread_testcancel ();
  36
  37   return 0;
  38 }
  39 libc_hidden_def (__pthread_setcanceltype)
  40 weak_alias (__pthread_setcanceltype, pthread_setcanceltype)