score/src/watchdoginsert.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreWatchdog
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _Watchdog_Insert().
0010  */
0011
0012 /*
0013  * Copyright (c) 2016 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/score/watchdogimpl.h>
0042
0043 void _Watchdog_Insert(
0044   Watchdog_Header  *header,
0045   Watchdog_Control *the_watchdog,
0046   uint64_t          expire
0047 )
0048 {
0049   RBTree_Node **link;
0050   RBTree_Node  *parent;
0051   RBTree_Node  *old_first;
0052   RBTree_Node  *new_first;
0053
0054   _Assert( _Watchdog_Get_state( the_watchdog ) == WATCHDOG_INACTIVE );
0055
0056   link = _RBTree_Root_reference( &header->Watchdogs );
0057   parent = NULL;
0058   old_first = header->first;
0059   new_first = &the_watchdog->Node.RBTree;
0060
0061   the_watchdog->expire = expire;
0062
0063   while ( *link != NULL ) {
0064     Watchdog_Control *parent_watchdog;
0065
0066     parent = *link;
0067     parent_watchdog = (Watchdog_Control *) parent;
0068
0069     if ( expire < parent_watchdog->expire ) {
0070       link = _RBTree_Left_reference( parent );
0071     } else {
0072       link = _RBTree_Right_reference( parent );
0073       new_first = old_first;
0074     }
0075   }
0076
0077   header->first = new_first;
0078   _RBTree_Initialize_node( &the_watchdog->Node.RBTree );
0079   _RBTree_Add_child( &the_watchdog->Node.RBTree, parent, link );
0080   _RBTree_Insert_color( &header->Watchdogs, &the_watchdog->Node.RBTree );
0081 }