| /* |
| * Copyright (c) 2021 Arm Limited. All rights reserved. |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include "timer.h" |
| |
| #include <assert.h> |
| #include <time.h> |
| #include <string.h> |
| |
| #define MILLISECONDS_IN_SECOND 1000 |
| #define MICROSECONDS_IN_SECOND 1000000 |
| #define NANOSECONDS_IN_MILLISECOND 1000000 |
| #define NANOSECONDS_IN_MICROSECOND 1000 |
| |
| /** |
| * @brief Gets the current time counter value. |
| * @return Counter value expressed in terms of time_counter struct. |
| **/ |
| static time_counter get_time_counter(void) |
| { |
| struct timespec current_time; |
| clock_gettime(1, ¤t_time); |
| time_counter t = { |
| .current_secs = current_time.tv_sec, |
| .current_nsecs = current_time.tv_nsec |
| }; |
| |
| return t; |
| } |
| |
| /** |
| * @brief Gets the time duration elapsed between start and end. |
| * @param[in] start Pointer to time_counter value at start time. |
| * @param[in] end Pointer to time_counter value at end. |
| * @return Difference in milliseconds between the arguments expressed |
| * as unsigned 32 bit integer. |
| **/ |
| static time_t get_duration_milliseconds(time_counter *start, time_counter *end) |
| { |
| /* Convert both parts of time struct to ms then add for complete time. */ |
| time_t seconds_part = |
| (end->current_secs - start->current_secs) * MILLISECONDS_IN_SECOND; |
| time_t nanoseconds_part = |
| (end->current_nsecs - start->current_nsecs) / NANOSECONDS_IN_MILLISECOND; |
| |
| return seconds_part + nanoseconds_part; |
| } |
| |
| /** |
| * @brief Gets the time duration elapsed between start and end. |
| * @param[in] start Pointer to time_counter value at start time. |
| * @param[in] end Pointer to time_counter value at end. |
| * @return Difference in microseconds between the arguments expressed |
| * as unsigned 32 bit integer. |
| **/ |
| static time_t get_duration_microseconds(time_counter *start, time_counter *end) |
| { |
| /* Convert both parts of time struct to us then add for complete time. */ |
| time_t seconds_part = |
| (end->current_secs - start->current_secs) * MICROSECONDS_IN_SECOND; |
| time_t nanoseconds_part = |
| (end->current_nsecs - start->current_nsecs) / NANOSECONDS_IN_MICROSECOND; |
| |
| return seconds_part + nanoseconds_part; |
| } |
| |
| /** |
| * @brief Stub for timer reset. |
| **/ |
| void reset_timer() {} |
| |
| /** |
| * @brief Initialise the timer for this platform. |
| **/ |
| void init_timer(platform_timer *timer) |
| { |
| assert(timer); |
| memset(timer, 0, sizeof(*timer)); |
| |
| timer->get_time_counter = get_time_counter; |
| timer->start_profiling = get_time_counter; |
| timer->stop_profiling = get_time_counter; |
| timer->get_duration_ms = get_duration_milliseconds; |
| timer->cap.duration_ms = 1; |
| timer->get_duration_us = get_duration_microseconds; |
| timer->cap.duration_us = 1; |
| timer->reset = reset_timer; |
| timer->inited = 1; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |