From 124af9f4b2b77b1510d88cfc8092c788d7e513c7 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Fri, 20 May 2005 19:02:51 +0000 Subject: Back out nptl changes, which for now will be done in branches/uClibc-nptl --- libpthread/nptl/pthread_cancel.c | 104 --------------------------------------- 1 file changed, 104 deletions(-) delete mode 100644 libpthread/nptl/pthread_cancel.c (limited to 'libpthread/nptl/pthread_cancel.c') diff --git a/libpthread/nptl/pthread_cancel.c b/libpthread/nptl/pthread_cancel.c deleted file mode 100644 index a13af56b3..000000000 --- a/libpthread/nptl/pthread_cancel.c +++ /dev/null @@ -1,104 +0,0 @@ -/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper , 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 -#include -#include "pthreadP.h" -#include "atomic.h" -#include -#include - - -int -pthread_cancel (th) - pthread_t th; -{ - volatile struct pthread *pd = (volatile struct pthread *) th; - - /* Make sure the descriptor is valid. */ - if (INVALID_TD_P (pd)) - /* Not a valid thread handle. */ - return ESRCH; - -#ifdef SHARED - pthread_cancel_init (); -#endif - int result = 0; - int oldval; - int newval; - do - { - oldval = pd->cancelhandling; - newval = oldval | CANCELING_BITMASK | CANCELED_BITMASK; - - /* Avoid doing unnecessary work. The atomic operation can - potentially be expensive if the bug has to be locked and - remote cache lines have to be invalidated. */ - if (oldval == newval) - break; - - /* If the cancellation is handled asynchronously just send a - signal. We avoid this if possible since it's more - expensive. */ - if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval)) - { - /* Mark the cancellation as "in progress". */ - atomic_bit_set (&pd->cancelhandling, CANCELING_BIT); - - /* The cancellation handler will take care of marking the - thread as canceled. */ - INTERNAL_SYSCALL_DECL (err); - - /* One comment: The PID field in the TCB can temporarily be - changed (in fork). But this must not affect this code - here. Since this function would have to be called while - the thread is executing fork, it would have to happen in - a signal handler. But this is no allowed, pthread_cancel - is not guaranteed to be async-safe. */ - int val; -#if __ASSUME_TGKILL - val = INTERNAL_SYSCALL (tgkill, err, 3, - THREAD_GETMEM (THREAD_SELF, pid), pd->tid, - SIGCANCEL); -#else -# ifdef __NR_tgkill - val = INTERNAL_SYSCALL (tgkill, err, 3, - THREAD_GETMEM (THREAD_SELF, pid), pd->tid, - SIGCANCEL); - if (INTERNAL_SYSCALL_ERROR_P (val, err) - && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS) -# endif - val = INTERNAL_SYSCALL (tkill, err, 2, pd->tid, SIGCANCEL); -#endif - - if (INTERNAL_SYSCALL_ERROR_P (val, err)) - result = INTERNAL_SYSCALL_ERRNO (val, err); - - break; - } - } - /* Mark the thread as canceled. This has to be done - atomically since other bits could be modified as well. */ - while (atomic_compare_and_exchange_bool_acq (&pd->cancelhandling, newval, - oldval)); - - return result; -} - -PTHREAD_STATIC_FN_REQUIRE (pthread_create) -- cgit v1.2.3