man/man3/Tcl_GetTime.3 - toolchains/skids - Git at Google

 '\"
 '\" Copyright (c) 2001 by Kevin B. Kenny.
 '\"
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\"
 '\" RCS: @(#) $Id: GetTime.3,v 1.3 2003/01/21 19:39:59 hunt Exp $
 '\"
 '\" The definitions below are for supplemental macros used in Tcl/Tk
 '\" manual entries.
 '\"
 '\" .AP type name in/out ?indent?
 '\"	Start paragraph describing an argument to a library procedure.
 '\"	type is type of argument (int, etc.), in/out is either "in", "out",
 '\"	or "in/out" to describe whether procedure reads or modifies arg,
 '\"	and indent is equivalent to second arg of .IP (shouldn't ever be
 '\"	needed;  use .AS below instead)
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 '\"
 '\" .OP cmdName dbName dbClass
 '\"	Start of description of a specific option.  cmdName gives the
 '\"	option's name as specified in the class command, dbName gives
 '\"	the option's name in the option database, and dbClass gives
 '\"	the option's class in the option database.
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 '\" .UL arg1 arg2
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 '\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
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 .if t .wh -1.3i ^B
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 .ie !"\\$4"" .TP \\$4
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 See the \\fBoptions\\fR manual entry for details on the standard options.
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 .TH Tcl_GetTime 3 8.4 Tcl "Tcl Library Procedures"
 .BS
 .SH NAME
 Tcl_GetTime \- get date and time
 .SH SYNOPSIS
 .nf
 \fB#include <tcl.h>\fR
 .sp
 \fBTcl_GetTime\fR(\fI timePtr \fR)
 .SH ARGUMENTS
 .AS "Tcl_Time *" timePtr
 .AP "Tcl_Time *" timePtr out
 Points to memory in which to store the date and time information.
 .BE
 .SH DESCRIPTION
 .PP
 The \fBTcl_GetTime\fR function retrieves the current time as a
 \fITcl_Time\fR structure in memory the caller provides.  This
 structure has the following definition:
 .CS
 typedef struct Tcl_Time {
     long sec;
     long usec;
 } Tcl_Time;
 .CE
 .PP
 On return, the \fIsec\fR member of the structure is filled in with the
 number of seconds that have elapsed since the \fIepoch:\fR the epoch
 is the point in time of 00:00 UTC, 1 January 1970.  This number does
 \fInot\fR count leap seconds \- an interval of one day advances it by
 86400 seconds regardless of whether a leap second has been inserted.
 .PP
 The \fIusec\fR member of the structure is filled in with the number of
 microseconds that have elapsed since the start of the second
 designated by \fIsec\fR.  The Tcl library makes every effort to keep
 this number as precise as possible, subject to the limitations of the
 computer system.  On multiprocessor variants of Windows, this number
 may be limited to the 10- or 20-ms granularity of the system clock.
 (On single-processor Windows systems, the \fIusec\fR field is derived
 from a performance counter and is highly precise.)
 .SH "SEE ALSO"
 clock
 .SH KEYWORDS
 date, time
	'\"
	'\" Copyright (c) 2001 by Kevin B. Kenny.
	'\"
	'\" See the file "license.terms" for information on usage and redistribution
	'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
	'\"
	'\" RCS: @(#) $Id: GetTime.3,v 1.3 2003/01/21 19:39:59 hunt Exp $
	'\"
	'\" The definitions below are for supplemental macros used in Tcl/Tk
	'\" manual entries.
	'\"
	'\" .AP type name in/out ?indent?
	'\" Start paragraph describing an argument to a library procedure.
	'\" type is type of argument (int, etc.), in/out is either "in", "out",
	'\" or "in/out" to describe whether procedure reads or modifies arg,
	'\" and indent is equivalent to second arg of .IP (shouldn't ever be
	'\" needed; use .AS below instead)
	'\"
	'\" .AS ?type? ?name?
	'\" Give maximum sizes of arguments for setting tab stops. Type and
	'\" name are examples of largest possible arguments that will be passed
	'\" to .AP later. If args are omitted, default tab stops are used.
	'\"
	'\" .BS
	'\" Start box enclosure. From here until next .BE, everything will be
	'\" enclosed in one large box.
	'\"
	'\" .BE
	'\" End of box enclosure.
	'\"
	'\" .CS
	'\" Begin code excerpt.
	'\"
	'\" .CE
	'\" End code excerpt.
	'\"
	'\" .VS ?version? ?br?
	'\" Begin vertical sidebar, for use in marking newly-changed parts
	'\" of man pages. The first argument is ignored and used for recording
	'\" the version when the .VS was added, so that the sidebars can be
	'\" found and removed when they reach a certain age. If another argument
	'\" is present, then a line break is forced before starting the sidebar.
	'\"
	'\" .VE
	'\" End of vertical sidebar.
	'\"
	'\" .DS
	'\" Begin an indented unfilled display.
	'\"
	'\" .DE
	'\" End of indented unfilled display.
	'\"
	'\" .SO
	'\" Start of list of standard options for a Tk widget. The
	'\" options follow on successive lines, in four columns separated
	'\" by tabs.
	'\"
	'\" .SE
	'\" End of list of standard options for a Tk widget.
	'\"
	'\" .OP cmdName dbName dbClass
	'\" Start of description of a specific option. cmdName gives the
	'\" option's name as specified in the class command, dbName gives
	'\" the option's name in the option database, and dbClass gives
	'\" the option's class in the option database.
	'\"
	'\" .UL arg1 arg2
	'\" Print arg1 underlined, then print arg2 normally.
	'\"
	'\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
	'\"
	'\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
	.if t .wh -1.3i ^B
	.nr ^l \n(.l
	.ad b
	'\" # Start an argument description
	.de AP
	.ie !"\\$4"" .TP \\$4
	.el \{\
	. ie !"\\$2"" .TP \\n()Cu
	. el .TP 15
	.\}
	.ta \\n()Au \\n()Bu
	.ie !"\\$3"" \{\
	\&\\$1 \\fI\\$2\\fP (\\$3)
	.\".b
	.\}
	.el \{\
	.br
	.ie !"\\$2"" \{\
	\&\\$1 \\fI\\$2\\fP
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	.el \{\
	\&\\fI\\$1\\fP
	.\}
	.\}
	..
	'\" # define tabbing values for .AP
	.de AS
	.nr )A 10n
	.if !"\\$1"" .nr )A \\w'\\$1'u+3n
	.nr )B \\n()Au+15n
	.\"
	.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
	.nr )C \\n()Bu+\\w'(in/out)'u+2n
	..
	.AS Tcl_Interp Tcl_CreateInterp in/out
	'\" # BS - start boxed text
	'\" # ^y = starting y location
	'\" # ^b = 1
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	.el \{\
	.\" Draw four-sided box normally, but don't draw top of
	.\" box if the box started on an earlier page.
	.ie !\\n(^b-1 \{\
	\h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
	.\}
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	.\}
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	.\}
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	..
	'\" # SO - start of list of standard options
	.de SO
	.SH "STANDARD OPTIONS"
	.LP
	.nf
	.ta 5.5c 11c
	.ft B
	..
	'\" # SE - end of list of standard options
	.de SE
	.fi
	.ft R
	.LP
	See the \\fBoptions\\fR manual entry for details on the standard options.
	..
	'\" # OP - start of full description for a single option
	.de OP
	.LP
	.nf
	.ta 4c
	Command-Line Name: \\fB\\$1\\fR
	Database Name: \\fB\\$2\\fR
	Database Class: \\fB\\$3\\fR
	.fi
	.IP
	..
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	.de CS
	.RS
	.nf
	.ta .25i .5i .75i 1i
	..
	'\" # CE - end code excerpt
	.de CE
	.fi
	.RE
	..
	.de UL
	\\$1\l'\|0\(ul'\\$2
	..
	.TH Tcl_GetTime 3 8.4 Tcl "Tcl Library Procedures"
	.BS
	.SH NAME
	Tcl_GetTime \- get date and time
	.SH SYNOPSIS
	.nf
	\fB#include <tcl.h>\fR
	.sp
	\fBTcl_GetTime\fR(\fI timePtr \fR)
	.SH ARGUMENTS
	.AS "Tcl_Time *" timePtr
	.AP "Tcl_Time *" timePtr out
	Points to memory in which to store the date and time information.
	.BE
	.SH DESCRIPTION
	.PP
	The \fBTcl_GetTime\fR function retrieves the current time as a
	\fITcl_Time\fR structure in memory the caller provides. This
	structure has the following definition:
	.CS
	typedef struct Tcl_Time {
	long sec;
	long usec;
	} Tcl_Time;
	.CE
	.PP
	On return, the \fIsec\fR member of the structure is filled in with the
	number of seconds that have elapsed since the \fIepoch:\fR the epoch
	is the point in time of 00:00 UTC, 1 January 1970. This number does
	\fInot\fR count leap seconds \- an interval of one day advances it by
	86400 seconds regardless of whether a leap second has been inserted.
	.PP
	The \fIusec\fR member of the structure is filled in with the number of
	microseconds that have elapsed since the start of the second
	designated by \fIsec\fR. The Tcl library makes every effort to keep
	this number as precise as possible, subject to the limitations of the
	computer system. On multiprocessor variants of Windows, this number
	may be limited to the 10- or 20-ms granularity of the system clock.
	(On single-processor Windows systems, the \fIusec\fR field is derived
	from a performance counter and is highly precise.)
	.SH "SEE ALSO"
	clock
	.SH KEYWORDS
	date, time