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Name	Size	Permission	Date
GID	[ DIR ]	drwxr-xr-x	2026-05-05 23:08
Status	[ DIR ]	drwxr-xr-x	2026-05-05 23:08
Sys	[ DIR ]	drwxr-xr-x	2026-05-05 23:08
Tms	[ DIR ]	drwxr-xr-x	2026-05-05 23:08
UID	[ DIR ]	drwxr-xr-x	2026-05-05 23:08
_fork-c.ri	1008 B	-rw-r--r--	2026-04-07 17:42
abort-c.ri	489 B	-rw-r--r--	2026-04-07 17:42
argv0-c.ri	562 B	-rw-r--r--	2026-04-07 17:42
cdesc-Process.ri	9.22 KB	-rw-r--r--	2026-04-07 17:42
clock_getres-c.ri	2.1 KB	-rw-r--r--	2026-04-07 17:42
clock_gettime-c.ri	7.47 KB	-rw-r--r--	2026-04-07 17:42
daemon-c.ri	786 B	-rw-r--r--	2026-04-07 17:42
detach-c.ri	1.88 KB	-rw-r--r--	2026-04-07 17:42
egid%3d-c.ri	391 B	-rw-r--r--	2026-04-07 17:42
egid-c.ri	549 B	-rw-r--r--	2026-04-07 17:42
euid%3d-c.ri	373 B	-rw-r--r--	2026-04-07 17:42
euid-c.ri	512 B	-rw-r--r--	2026-04-07 17:42
exec-c.ri	3.65 KB	-rw-r--r--	2026-04-07 17:42
exit%21-c.ri	538 B	-rw-r--r--	2026-04-07 17:42
exit-c.ri	1.46 KB	-rw-r--r--	2026-04-07 17:42
fork-c.ri	1.38 KB	-rw-r--r--	2026-04-07 17:42
getpgid-c.ri	519 B	-rw-r--r--	2026-04-07 17:42
getpgrp-c.ri	529 B	-rw-r--r--	2026-04-07 17:42
getpriority-c.ri	965 B	-rw-r--r--	2026-04-07 17:42
getrlimit-c.ri	982 B	-rw-r--r--	2026-04-07 17:42
getsid-c.ri	684 B	-rw-r--r--	2026-04-07 17:42
gid%3d-c.ri	338 B	-rw-r--r--	2026-04-07 17:42
gid-c.ri	504 B	-rw-r--r--	2026-04-07 17:42
groups%3d-c.ri	625 B	-rw-r--r--	2026-04-07 17:42
groups-c.ri	1.15 KB	-rw-r--r--	2026-04-07 17:42
initgroups-c.ri	941 B	-rw-r--r--	2026-04-07 17:42
kill-c.ri	1.68 KB	-rw-r--r--	2026-04-07 17:42
last_status-c.ri	764 B	-rw-r--r--	2026-04-07 17:42
maxgroups%3d-c.ri	406 B	-rw-r--r--	2026-04-07 17:42
maxgroups-c.ri	496 B	-rw-r--r--	2026-04-07 17:42
pid-c.ri	465 B	-rw-r--r--	2026-04-07 17:42
ppid-c.ri	664 B	-rw-r--r--	2026-04-07 17:42
setpgid-c.ri	437 B	-rw-r--r--	2026-04-07 17:42
setpgrp-c.ri	375 B	-rw-r--r--	2026-04-07 17:42
setpriority-c.ri	695 B	-rw-r--r--	2026-04-07 17:42
setproctitle-c.ri	917 B	-rw-r--r--	2026-04-07 17:42
setrlimit-c.ri	2.99 KB	-rw-r--r--	2026-04-07 17:42
setsid-c.ri	561 B	-rw-r--r--	2026-04-07 17:42
spawn-c.ri	12.66 KB	-rw-r--r--	2026-04-07 17:42
times-c.ri	629 B	-rw-r--r--	2026-04-07 17:42
uid%3d-c.ri	380 B	-rw-r--r--	2026-04-07 17:42
uid-c.ri	502 B	-rw-r--r--	2026-04-07 17:42
wait-c.ri	2.17 KB	-rw-r--r--	2026-04-07 17:42
wait2-c.ri	874 B	-rw-r--r--	2026-04-07 17:42
waitall-c.ri	883 B	-rw-r--r--	2026-04-07 17:42
waitpid-c.ri	2.18 KB	-rw-r--r--	2026-04-07 17:42
waitpid2-c.ri	880 B	-rw-r--r--	2026-04-07 17:42

Rename

U:RDoc::AnyMethod[iI"clock_gettime:ETI"Process::clock_gettime;TT:privateo:RDoc::Markup::Document:@parts[#o:RDoc::Markup::Paragraph;	[I"?Returns a time returned by POSIX clock_gettime() function.;To:RDoc::Markup::BlankLine�o:RDoc::Markup::Verbatim;	[I"7p Process.clock_gettime(Process::CLOCK_MONOTONIC)
;TI"#=> 896053.968060096
;T:@format0o;
;	[I"++clock_id+ specifies a kind of clock. ;TI"RIt is specified as a constant which begins with <code>Process::CLOCK_</code> ;TI"Bsuch as Process::CLOCK_REALTIME and Process::CLOCK_MONOTONIC.;T@o;
;	[I"8The supported constants depends on OS and version. ;TI">Ruby provides following types of +clock_id+ if available.;T@o:RDoc::Markup::List:
@type:
LABEL:@items[o:RDoc::Markup::ListItem:@label[I"CLOCK_REALTIME;T;	[o;
;	[I"gSUSv2 to 4, Linux 2.5.63, FreeBSD 3.0, NetBSD 2.0, OpenBSD 2.1, macOS 10.12, Windows-8/Server-2012;To;;[I"CLOCK_MONOTONIC;T;	[o;
;	[I"^SUSv3 to 4, Linux 2.5.63, FreeBSD 3.0, NetBSD 2.0, OpenBSD 3.4, macOS 10.12, Windows-2000;To;;[I"CLOCK_PROCESS_CPUTIME_ID;T;	[o;
;	[I"DSUSv3 to 4, Linux 2.5.63, FreeBSD 9.3, OpenBSD 5.4, macOS 10.12;To;;[I"CLOCK_THREAD_CPUTIME_ID;T;	[o;
;	[I"DSUSv3 to 4, Linux 2.5.63, FreeBSD 7.1, OpenBSD 5.4, macOS 10.12;To;;[I"CLOCK_VIRTUAL;T;	[o;
;	[I"FreeBSD 3.0, OpenBSD 2.1;To;;[I"CLOCK_PROF;T;	[o;
;	[I"FreeBSD 3.0, OpenBSD 2.1;To;;[I"CLOCK_REALTIME_FAST;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_REALTIME_PRECISE;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_REALTIME_COARSE;T;	[o;
;	[I"Linux 2.6.32;To;;[I"CLOCK_REALTIME_ALARM;T;	[o;
;	[I"Linux 3.0;To;;[I"CLOCK_MONOTONIC_FAST;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_MONOTONIC_PRECISE;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_MONOTONIC_COARSE;T;	[o;
;	[I"Linux 2.6.32;To;;[I"CLOCK_MONOTONIC_RAW;T;	[o;
;	[I"Linux 2.6.28, macOS 10.12;To;;[I"CLOCK_MONOTONIC_RAW_APPROX;T;	[o;
;	[I"macOS 10.12;To;;[I"CLOCK_BOOTTIME;T;	[o;
;	[I"Linux 2.6.39;To;;[I"CLOCK_BOOTTIME_ALARM;T;	[o;
;	[I"Linux 3.0;To;;[I"CLOCK_UPTIME;T;	[o;
;	[I"FreeBSD 7.0, OpenBSD 5.5;To;;[I"CLOCK_UPTIME_FAST;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_UPTIME_RAW;T;	[o;
;	[I"macOS 10.12;To;;[I"CLOCK_UPTIME_RAW_APPROX;T;	[o;
;	[I"macOS 10.12;To;;[I"CLOCK_UPTIME_PRECISE;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_SECOND;T;	[o;
;	[I"FreeBSD 8.1;To;;[I"CLOCK_TAI;T;	[o;
;	[I"Linux 3.10;T@o;
;	[	I"9Note that SUS stands for Single Unix Specification. ;TI"HSUS contains POSIX and clock_gettime is defined in the POSIX part. ;TI".SUS defines CLOCK_REALTIME mandatory but ;TI"XCLOCK_MONOTONIC, CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID are optional.;T@o;
;	[I"7Also, several symbols are accepted as +clock_id+. ;TI".There are emulations for clock_gettime().;T@o;
;	[I"8For example, Process::CLOCK_REALTIME is defined as ;TI"P+:GETTIMEOFDAY_BASED_CLOCK_REALTIME+ when clock_gettime() is not available.;T@o;
;	[I"%Emulations for +CLOCK_REALTIME+:;To;;;;[o;;[I"':GETTIMEOFDAY_BASED_CLOCK_REALTIME;T;	[o;
;	[I"(Use gettimeofday() defined by SUS. ;TI"#(SUSv4 obsoleted it, though.) ;TI"%The resolution is 1 microsecond.;To;;[I":TIME_BASED_CLOCK_REALTIME;T;	[o;
;	[I""Use time() defined by ISO C. ;TI" The resolution is 1 second.;T@o;
;	[I"&Emulations for +CLOCK_MONOTONIC+:;To;;;;[o;;[I".:MACH_ABSOLUTE_TIME_BASED_CLOCK_MONOTONIC;T;	[o;
;	[I"4Use mach_absolute_time(), available on Darwin. ;TI"%The resolution is CPU dependent.;To;;[I"!:TIMES_BASED_CLOCK_MONOTONIC;T;	[o;
;	[I"7Use the result value of times() defined by POSIX. ;TI"�POSIX defines it as "times() shall return the elapsed real time, in clock ticks, since an arbitrary point in the past (for example, system start-up time)". ;TI"RFor example, GNU/Linux returns a value based on jiffies and it is monotonic. ;TI"BHowever, 4.4BSD uses gettimeofday() and it is not monotonic. ;TI"D(FreeBSD uses clock_gettime(CLOCK_MONOTONIC) instead, though.) ;TI"'The resolution is the clock tick. ;TI"A"getconf CLK_TCK" command shows the clock ticks per second. ;TI"K(The clock ticks per second is defined by HZ macro in older systems.) ;TI"\If it is 100 and clock_t is 32 bits integer type, the resolution is 10 millisecond and ;TI"$cannot represent over 497 days.;T@o;
;	[I"/Emulations for +CLOCK_PROCESS_CPUTIME_ID+:;To;;;;[o;;[I".:GETRUSAGE_BASED_CLOCK_PROCESS_CPUTIME_ID;T;	[o;
;	[
I"%Use getrusage() defined by SUS. ;TI"Fgetrusage() is used with RUSAGE_SELF to obtain the time only for ;TI"Cthe calling process (excluding the time for child processes). ;TI"PThe result is addition of user time (ru_utime) and system time (ru_stime). ;TI"%The resolution is 1 microsecond.;To;;[I"*:TIMES_BASED_CLOCK_PROCESS_CPUTIME_ID;T;	[o;
;	[I"#Use times() defined by POSIX. ;TI"RThe result is addition of user time (tms_utime) and system time (tms_stime). ;TI"Ttms_cutime and tms_cstime are ignored to exclude the time for child processes. ;TI"'The resolution is the clock tick. ;TI"A"getconf CLK_TCK" command shows the clock ticks per second. ;TI"K(The clock ticks per second is defined by HZ macro in older systems.) ;TI"4If it is 100, the resolution is 10 millisecond.;To;;[I"*:CLOCK_BASED_CLOCK_PROCESS_CPUTIME_ID;T;	[o;
;	[I"#Use clock() defined by ISO C. ;TI")The resolution is 1/CLOCKS_PER_SEC. ;TI"<CLOCKS_PER_SEC is the C-level macro defined by time.h. ;TI",SUS defines CLOCKS_PER_SEC is 1000000. ;TI"?Non-Unix systems may define it a different value, though. ;TI"KIf CLOCKS_PER_SEC is 1000000 as SUS, the resolution is 1 microsecond. ;TI"kIf CLOCKS_PER_SEC is 1000000 and clock_t is 32 bits integer type, it cannot represent over 72 minutes.;T@o;
;	[I"GIf the given +clock_id+ is not supported, Errno::EINVAL is raised.;T@o;
;	[I"1+unit+ specifies a type of the return value.;T@o;;;;[o;;[I":float_second;T;	[o;
;	[I"+number of seconds as a float (default);To;;[I":float_millisecond;T;	[o;
;	[I"&number of milliseconds as a float;To;;[I":float_microsecond;T;	[o;
;	[I"&number of microseconds as a float;To;;[I":second;T;	[o;
;	[I"$number of seconds as an integer;To;;[I":millisecond;T;	[o;
;	[I")number of milliseconds as an integer;To;;[I":microsecond;T;	[o;
;	[I")number of microseconds as an integer;To;;[I":nanosecond;T;	[o;
;	[I"(number of nanoseconds as an integer;T@o;
;	[	I"PThe underlying function, clock_gettime(), returns a number of nanoseconds. ;TI"?Float object (IEEE 754 double) is not enough to represent ;TI"*the return value for CLOCK_REALTIME. ;TI"QIf the exact nanoseconds value is required, use +:nanosecond+ as the +unit+.;T@o;
;	[I"5The origin (zero) of the returned value varies. ;TI"NFor example, system start up time, process start up time, the Epoch, etc.;T@o;
;	[
I":The origin in CLOCK_REALTIME is defined as the Epoch ;TI" (1970-01-01 00:00:00 UTC). ;TI"=But some systems count leap seconds and others doesn't. ;TI"BSo the result can be interpreted differently across systems. ;TI"1Time.now is recommended over CLOCK_REALTIME.;T:
@fileI"process.c;T:0@omit_headings_from_table_of_contents_below0I":Process.clock_gettime(clock_id [, unit])   -> number
;T0[�I"(*args);T@vFI"Process;TcRDoc::NormalModule00