[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/hurd/thread-cancel.c b/ap/libc/glibc/glibc-2.22/hurd/thread-cancel.c
new file mode 100644
index 0000000..5d94f8c
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/hurd/thread-cancel.c
@@ -0,0 +1,100 @@
+/* Thread cancellation support.
+ Copyright (C) 1995-2015 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;
+}