diff options
Diffstat (limited to 'cpukit/include/rtems/counter.h')
| -rw-r--r-- | cpukit/include/rtems/counter.h | 43 |
1 files changed, 28 insertions, 15 deletions
diff --git a/cpukit/include/rtems/counter.h b/cpukit/include/rtems/counter.h index 0053afcbd5..9d8fa31719 100644 --- a/cpukit/include/rtems/counter.h +++ b/cpukit/include/rtems/counter.h @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + /** * @file * @@ -8,17 +10,28 @@ */ /* - * Copyright (c) 2014, 2018 embedded brains GmbH. All rights reserved. - * - * embedded brains GmbH - * Dornierstr. 4 - * 82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. + * Copyright (C) 2014, 2018 embedded brains GmbH & Co. KG + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * 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 OWNER 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. */ #ifndef _RTEMS_SAPI_COUNTER_H @@ -86,20 +99,20 @@ static inline rtems_counter_ticks rtems_counter_read( void ) * @brief Returns the difference between the second and first CPU counter * value. * - * This operation may be carried out as a modulo operation depending on the - * range of the CPU counter device. + * This function is provided for backward compatibility. + * You may use "second - first" directly in the code. * * @param[in] second The second CPU counter value. * @param[in] first The first CPU counter value. * - * @return Returns second minus first modulo counter period. + * @return Returns second minus first. */ static inline rtems_counter_ticks rtems_counter_difference( rtems_counter_ticks second, rtems_counter_ticks first ) { - return _CPU_Counter_difference( second, first ); + return second - first; } /** |