54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <stdint.h>
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#include "esp_err.h"
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/**
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* @brief Start the timer on the current core.
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*
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* @return
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* - ESP_OK: Success
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* - ESP_ERR_INVALID_STATE: The timer has already been started previously.
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* - Others: Fail
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*/
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esp_err_t ccomp_timer_start(void);
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/**
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* @brief Stop the timer on the current core.
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*
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* @note Returns -1 if an error has occured and stopping the timer failed.
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*
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* @return The time elapsed from the last ccomp_timer_start call on the current
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* core.
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*/
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int64_t ccomp_timer_stop(void);
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/**
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* Return the current timer value on the current core without stopping the timer.
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*
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* @note Returns -1 if an error has occured and stopping the timer failed.
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*
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* @note If called while timer is active i.e. between ccomp_timer_start and ccomp_timer_stop,
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* this function returns the elapsed time from ccomp_timer_start. Once ccomp_timer_stop
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* has been called, the timer becomes inactive and stops keeping time. As a result, if this function gets
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* called after esp_cccomp_timer_stop, this function will return the same value as when the timer was stopped.
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*
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* @return The elapsed time from the last ccomp_timer_start call on the current
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* core.
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*/
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int64_t ccomp_timer_get_time(void);
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