d22bbac76c
* times.cc: Ditto. localtime, gmtime). (FACTOR): Add comment. (NSPERSEC): Ditto. (JITTER): New definition. Comment. (systime_ns): Avoid gratuitous copying of the value returned by GetSystemTimeAsFileTime. (corelocaltime, localtime, gmtime): Remove very old, unused code block. (cygwin_tzset): Remove. (hires_ms::timeGetTime_ns): Add missing semicolon in comment. (hires_ms::nsecs): Redefine check for difference between internal timer value and system time.
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/* hires.h: Definitions for hires clock calculations
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Copyright 2002, 2003, 2004, 2005, 2009, 2010, 2011 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef __HIRES_H__
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#define __HIRES_H__
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#include <mmsystem.h>
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/* Largest delay in ms for sleep and alarm calls.
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Allow actual delay to exceed requested delay by 10 s.
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Express as multiple of 1000 (i.e. seconds) + max resolution
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The tv_sec argument in timeval structures cannot exceed
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HIRES_DELAY_MAX / 1000 - 1, so that adding fractional part
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and rounding won't exceed HIRES_DELAY_MAX */
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#define HIRES_DELAY_MAX ((((UINT_MAX - 10000) / 1000) * 1000) + 10)
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class hires_base
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{
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protected:
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int inited;
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public:
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void reset() {inited = false;}
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};
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class hires_ns : public hires_base
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{
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LARGE_INTEGER primed_pc;
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double freq;
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void prime ();
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public:
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LONGLONG nsecs ();
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LONGLONG usecs () {return nsecs () / 1000LL;}
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LONGLONG resolution();
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};
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class hires_ms : public hires_base
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{
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LONGLONG initime_ns;
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LONGLONG timeGetTime_ns ();
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void prime ();
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public:
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LONGLONG nsecs ();
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LONGLONG usecs () {return nsecs () / 10LL;}
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LONGLONG msecs () {return nsecs () / 10000LL;}
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UINT dmsecs () { return timeGetTime_ns () / 10000LL; }
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UINT resolution ();
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LONGLONG uptime () {return (nsecs () - initime_ns) / 10000LL;}
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};
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extern hires_ms gtod;
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#endif /*__HIRES_H__*/
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