117 lines
2.5 KiB
C++
117 lines
2.5 KiB
C++
/*
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* mptTime.h
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* ---------
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* Purpose: Various time utility functions.
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "BuildSettings.h"
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#include <string>
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#include <time.h>
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OPENMPT_NAMESPACE_BEGIN
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namespace mpt
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{
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namespace Date
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{
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#if defined(MODPLUG_TRACKER)
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#if MPT_OS_WINDOWS
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namespace ANSI
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{
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// uint64 counts 100ns since 1601-01-01T00:00Z
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uint64 Now();
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mpt::ustring ToUString(uint64 time100ns); // i.e. 2015-01-15 18:32:01.718
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} // namespacee ANSI
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#endif // MPT_OS_WINDOWS
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#endif // MODPLUG_TRACKER
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class Unix
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{
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// int64 counts 1s since 1970-01-01T00:00Z
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private:
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int64 Value;
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public:
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Unix();
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explicit Unix(int64 unixtime);
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operator int64 () const;
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public:
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static mpt::Date::Unix FromUTC(tm timeUtc);
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tm AsUTC() const;
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};
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mpt::ustring ToShortenedISO8601(tm date); // i.e. 2015-01-15T18:32:01Z
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} // namespace Date
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} // namespace mpt
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#ifdef MODPLUG_TRACKER
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namespace Util
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{
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#if MPT_OS_WINDOWS
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// RAII wrapper around timeBeginPeriod/timeEndPeriod/timeGetTime (on Windows).
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// This clock is monotonic, even across changing its resolution.
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// This is needed to synchronize time in Steinberg APIs (ASIO and VST).
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class MultimediaClock
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{
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private:
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uint32 m_CurrentPeriod;
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private:
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void Init();
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void SetPeriod(uint32 ms);
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void Cleanup();
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public:
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MultimediaClock();
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MultimediaClock(uint32 ms);
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~MultimediaClock();
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public:
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// Sets the desired resolution in milliseconds, returns the obtained resolution in milliseconds.
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// A parameter of 0 causes the resolution to be reset to system defaults.
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// A return value of 0 means the resolution is unknown, but timestamps will still be valid.
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uint32 SetResolution(uint32 ms);
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// Returns obtained resolution in milliseconds.
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// A return value of 0 means the resolution is unknown, but timestamps will still be valid.
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uint32 GetResolution() const;
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// Returns current instantaneous timestamp in milliseconds.
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// The epoch (offset) of the timestamps is undefined but constant until the next system reboot.
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// The resolution is the value returned from GetResolution().
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uint32 Now() const;
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// Returns current instantaneous timestamp in nanoseconds.
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// The epoch (offset) of the timestamps is undefined but constant until the next system reboot.
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// The resolution is the value returned from GetResolution() in milliseconds.
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uint64 NowNanoseconds() const;
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};
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#endif // MPT_OS_WINDOWS
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} // namespace Util
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#endif // MODPLUG_TRACKER
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OPENMPT_NAMESPACE_END
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