diff options
Diffstat (limited to 'libpthread/nptl/pthread_setcanceltype.c')
| -rw-r--r-- | libpthread/nptl/pthread_setcanceltype.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/libpthread/nptl/pthread_setcanceltype.c b/libpthread/nptl/pthread_setcanceltype.c deleted file mode 100644 index bbe87ba64..000000000 --- a/libpthread/nptl/pthread_setcanceltype.c +++ /dev/null @@ -1,76 +0,0 @@ -/* Copyright (C) 2002, 2003 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include "pthreadP.h" -#include <atomic.h> - - -int -__pthread_setcanceltype (type, oldtype) - int type; - int *oldtype; -{ - volatile struct pthread *self; - - if (type < PTHREAD_CANCEL_DEFERRED || type > PTHREAD_CANCEL_ASYNCHRONOUS) - return EINVAL; - - self = THREAD_SELF; - - int oldval = THREAD_GETMEM (self, cancelhandling); - while (1) - { - int newval = (type == PTHREAD_CANCEL_ASYNCHRONOUS - ? oldval | CANCELTYPE_BITMASK - : oldval & ~CANCELTYPE_BITMASK); - - /* Store the old value. */ - if (oldtype != NULL) - *oldtype = ((oldval & CANCELTYPE_BITMASK) - ? PTHREAD_CANCEL_ASYNCHRONOUS : PTHREAD_CANCEL_DEFERRED); - - /* Avoid doing unnecessary work. The atomic operation can - potentially be expensive if the memory has to be locked and - remote cache lines have to be invalidated. */ - if (oldval == newval) - break; - - /* Update the cancel handling word. This has to be done - atomically since other bits could be modified as well. */ - int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval, - oldval); - if (__builtin_expect (curval == oldval, 1)) - { - if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval)) - { - THREAD_SETMEM (self, result, PTHREAD_CANCELED); - __do_cancel (); - } - - break; - } - - /* Prepare for the next round. */ - oldval = curval; - } - - return 0; -} -strong_alias (__pthread_setcanceltype, pthread_setcanceltype) |