--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcilkrts/runtime/signal_node.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,120 @@
+/* signal_node.h                  -*-C++-*-
+ *
+ *************************************************************************
+ *
+ *  Copyright (C) 2009-2016, Intel Corporation
+ *  All rights reserved.
+ *  
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *  
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in
+ *      the documentation and/or other materials provided with the
+ *      distribution.
+ *    * Neither the name of Intel Corporation nor the names of its
+ *      contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *  
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ *  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+ *  WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ *  
+ *  *********************************************************************
+ *  
+ *  PLEASE NOTE: This file is a downstream copy of a file mainitained in
+ *  a repository at cilkplus.org. Changes made to this file that are not
+ *  submitted through the contribution process detailed at
+ *  http://www.cilkplus.org/submit-cilk-contribution will be lost the next
+ *  time that a new version is released. Changes only submitted to the
+ *  GNU compiler collection or posted to the git repository at
+ *  https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
+ *  not tracked.
+ *  
+ *  We welcome your contributions to this open source project. Thank you
+ *  for your assistance in helping us improve Cilk Plus.
+ **************************************************************************/
+
+/**
+ * @file signal_node.h
+ *
+ * @brief Signal nodes allow coordinated waking and sleeping of the runtime
+ * without hammering on a single location in memory.
+ *
+ * The workers are logically arranged in a binary tree and propagate messages
+ * leaf-ward.  User workers notify the root about waking and sleeping, so only
+ * that one node need share a cache line with a user worker.
+ */
+
+#ifndef INCLUDED_SIGNAL_NODE_DOT_H
+#define INCLUDED_SIGNAL_NODE_DOT_H
+
+#include "rts-common.h"
+#include <cilk/common.h>
+
+__CILKRTS_BEGIN_EXTERN_C
+
+/** Opaque type. */
+typedef struct signal_node_t signal_node_t;
+
+/**
+ * Allocate and initialize a signal_node_t
+ *
+ * @return The initialized signal_node_t
+ */
+COMMON_SYSDEP
+signal_node_t *signal_node_create(void);
+
+/**
+ * Free any resources and deallocate a signal_node_t
+ *
+ * @param node The node to be deallocated.
+ */
+COMMON_SYSDEP void signal_node_destroy(signal_node_t *node);
+
+/**
+ * Test whether the node thinks the worker should go to sleep
+ *
+ * @param node The node to be tested.
+ *
+ * @return 1 If the worker should go to sleep
+ * @return 0 If the worker should not go to sleep
+ */
+COMMON_SYSDEP
+unsigned int signal_node_should_wait(signal_node_t *node);
+
+/**
+ * Specify whether the worker should go to sleep
+ *
+ * @param node The node to be set.
+ * @param msg The value to be set.  Valid values are:
+ * - 0 - the worker should go to sleep
+ * - 1 - the worker should stay active
+ */
+COMMON_SYSDEP
+void signal_node_msg(signal_node_t *node, unsigned int msg);
+
+
+/**
+ * Wait for the node to be set
+ *
+ * @param node The node to wait on
+ */
+COMMON_SYSDEP
+void signal_node_wait(signal_node_t *node);
+
+__CILKRTS_END_EXTERN_C
+
+#endif // ! defined(INCLUDED_SIGNAL_NODE_DOT_H)