diff options
Diffstat (limited to 'hurd/thread-cancel.c')
-rw-r--r-- | hurd/thread-cancel.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/hurd/thread-cancel.c b/hurd/thread-cancel.c deleted file mode 100644 index 722b6adc74..0000000000 --- a/hurd/thread-cancel.c +++ /dev/null @@ -1,100 +0,0 @@ -/* Thread cancellation support. - Copyright (C) 1995-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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, see - <http://www.gnu.org/licenses/>. */ - -#include <hurd/signal.h> -#include <hurd/interrupt.h> -#include <assert.h> -#include <thread_state.h> - - -/* See hurdsig.c. */ -extern mach_port_t _hurdsig_abort_rpcs (struct hurd_sigstate *ss, - int signo, int sigthread, - struct machine_thread_all_state *, - int *state_change, - mach_port_t *reply_port, - mach_msg_type_name_t reply_port_type, - int untraced); - -error_t -hurd_thread_cancel (thread_t thread) -{ - struct hurd_sigstate *ss = _hurd_thread_sigstate (thread); - struct machine_thread_all_state state; - int state_change; - error_t err; - - if (! ss) - return EINVAL; - if (ss == _hurd_self_sigstate ()) - { - /* We are cancelling ourselves, so it is easy to succeed - quickly. Since this function is not a cancellation point, we - just leave the flag set pending the next cancellation point - (hurd_check_cancel or RPC) and return success. */ - ss->cancel = 1; - return 0; - } - - assert (! __spin_lock_locked (&ss->critical_section_lock)); - __spin_lock (&ss->critical_section_lock); - __spin_lock (&ss->lock); - err = __thread_suspend (thread); - __spin_unlock (&ss->lock); - - if (! err) - { - /* Set the flag telling the thread its operation is being cancelled. */ - ss->cancel = 1; - - /* Interrupt any interruptible RPC now in progress. */ - state.set = 0; - _hurdsig_abort_rpcs (ss, 0, 0, &state, &state_change, NULL, 0, 0); - if (state_change) - err = __thread_set_state (thread, MACHINE_THREAD_STATE_FLAVOR, - (natural_t *) &state.basic, - MACHINE_THREAD_STATE_COUNT); - - if (ss->cancel_hook) - /* The code being cancelled has a special wakeup function. - Calling this should make the thread wake up and check the - cancellation flag. */ - (*ss->cancel_hook) (); - - __thread_resume (thread); - } - - _hurd_critical_section_unlock (ss); - return err; -} - - -int -hurd_check_cancel (void) -{ - struct hurd_sigstate *ss = _hurd_self_sigstate (); - int cancel; - - __spin_lock (&ss->lock); - assert (! __spin_lock_locked (&ss->critical_section_lock)); - cancel = ss->cancel; - ss->cancel = 0; - __spin_unlock (&ss->lock); - - return cancel; -} |