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42 lines
1.5 KiB
42 lines
1.5 KiB
/****************************************************************************** |
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* |
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* Copyright (C) 2015 Google, Inc. |
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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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* |
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******************************************************************************/ |
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#pragma once |
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#include <stdint.h> |
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typedef uint64_t period_ms_t; |
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// Get the OS boot time in milliseconds. |
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// |
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// NOTE: The return value will rollover every 49.7 days, |
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// hence it cannot be used for absolute time comparison. |
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// Relative time comparison using 32-bits integers such |
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// as (t2_u32 - t1_u32 < delta_u32) should work as expected as long |
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// as there is no multiple rollover between t2_u32 and t1_u32. |
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// |
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// TODO: This function's return type should be modified to |period_ms_t|. |
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// Be careful: some of the code that is using it assumes the return type |
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// is uint32_t. |
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uint32_t time_get_os_boottime_ms(void); |
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// Get the OS boot time in microseconds. |
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uint64_t time_get_os_boottime_us(void); |
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// Get the current wall clock time in microseconds. |
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uint64_t time_gettimeofday_us(void);
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