a889aa9e38
This PR introduces a more precise sleep function `BLI_time_sleep_duration` using high-resolution timers on Windows. By default, Windows only has a resolution of 15.25ms for the regular `Sleep` function. Using more precise timers makes sure that Blender can wake from sleep quicker and improves performance at high frame rates. High-resolution timers may have better energy efficiency than using `timeBeginPeriod`/`timeEndPeriod` that change the timer resolution globally on some versions of Windows. Pull Request: https://projects.blender.org/blender/blender/pulls/140221
34 lines
955 B
C
34 lines
955 B
C
/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bli
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* \brief Platform independent time functions.
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*/
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#pragma once
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/**
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* Return an indication of time, expressed as seconds since some fixed point.
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* Successive calls are guaranteed to generate values greater than or equal to the last call.
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*/
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extern double BLI_time_now_seconds(void);
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/** `int` version of #BLI_time_now_seconds. */
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extern long int BLI_time_now_seconds_i(void);
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/**
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* Platform-independent sleep function.
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* \param ms: Number of milliseconds to sleep
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*/
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void BLI_time_sleep_ms(int ms);
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/**
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* Platform-independent high-resolution sleep function.
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* Using this function can have advantages over \see BLI_time_sleep_ms on Windows due to a default
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* non-precise sleep resolution of 15.25ms.
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* \param us: Number of microseconds to sleep
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*/
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void BLI_time_sleep_precise_us(int us);
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