ÿØÿà JFIF    ÿÛ „  ( %!1!%)+//.383,7(-.+  -%%-////---/-.+/--+------/------/--0+--/-/-----.-----ÿÀ  ¥2" ÿÄ     ÿÄ J    ! 1AQ"aq2‘#BR‚¡ÁÑ3br’¢±Âð$CSƒ²á4c“%DsÓñÿÄ   ÿÄ *  !1AQa‘"2q3±ð#b¡ÿÚ   ? ¼QxJQaÍuò¸Zö Úü8,ÐÚú "SSn<rçù–´âE—^ªBÖ9À\†¸ÔÁT­ÃÛ5 ëd´³Í#Ý;Þ38œî ¶H£M:wÎ3…³…âpÔF&‚FK¸9„â4àGEõªfÿ ‘ñ(ßw­pŽF|È¥ù®häðÍѶ¹‘[ÒinÙW¶ùñY˜Q{›K"išÒ[Ú8žë\F¹@-?v"ÔU”,ìöžkÿ {I‡£šÍ?e ríV ?> ......................................... ............................................................................. ÿØÿà JFIF    ÿÛ „  ( %!1!%)+//.383,7(-.+  -%%-////---/-.+/--+------/------/--0+--/-/-----.-----ÿÀ  ¥2" ÿÄ     ÿÄ J    ! 1AQ"aq2‘#BR‚¡ÁÑ3br’¢±Âð$CSƒ²á4c“%DsÓñÿÄ   ÿÄ *  !1AQa‘"2q3±ð#b¡ÿÚ   ? ¼QxJQaÍuò¸Zö Úü8,ÐÚú "SSn<rçù–´âE—^ªBÖ9À\†¸ÔÁT­ÃÛ5 ëd´³Í#Ý;Þ38œî ¶H£M:wÎ3…³…âpÔF&‚FK¸9„â4àGEõªfÿ ‘ñ(ßw­pŽF|È¥ù®häðÍѶ¹‘[ÒinÙW¶ùñY˜Q{›K"išÒ[Ú8žë\F¹@-?v"ÔU”,ìöžkÿ {I‡£šÍ?e ríV ?> ......................................... ............................................................................. ???????????????????????????????????? ???????????????????????????????????? ÿØÿà JFIF    ÿÛ „  ( %!1!%)+//.383,7(-.+  -%%-////---/-.+/--+------/------/--0+--/-/-----.-----ÿÀ  ¥2" ÿÄ     ÿÄ J    ! 1AQ"aq2‘#BR‚¡ÁÑ3br’¢±Âð$CSƒ²á4c“%DsÓñÿÄ   ÿÄ *  !1AQa‘"2q3±ð#b¡ÿÚ   ? ¼QxJQaÍuò¸Zö Úü8,ÐÚú "SSn<rçù–´âE—^ªBÖ9À\†¸ÔÁT­ÃÛ5 ëd´³Í#Ý;Þ38œî ¶H£M:wÎ3…³…âpÔF&‚FK¸9„â4àGEõªfÿ ‘ñ(ßw­pŽF|È¥ù®häðÍѶ¹‘[ÒinÙW¶ùñY˜Q{›K"išÒ[Ú8žë\F¹@-?v"ÔU”,ìöžkÿ {I‡£šÍ?e ríV ?> ......................................... ............................................................................. ÿØÿà JFIF    ÿÛ „  ( %!1!%)+//.383,7(-.+  -%%-////---/-.+/--+------/------/--0+--/-/-----.-----ÿÀ  ¥2" ÿÄ     ÿÄ J    ! 1AQ"aq2‘#BR‚¡ÁÑ3br’¢±Âð$CSƒ²á4c“%DsÓñÿÄ   ÿÄ *  !1AQa‘"2q3±ð#b¡ÿÚ   ? ¼QxJQaÍuò¸Zö Úü8,ÐÚú "SSn<rçù–´âE—^ªBÖ9À\†¸ÔÁT­ÃÛ5 ëd´³Í#Ý;Þ38œî ¶H£M:wÎ3…³…âpÔF&‚FK¸9„â4àGEõªfÿ ‘ñ(ßw­pŽF|È¥ù®häðÍѶ¹‘[ÒinÙW¶ùñY˜Q{›K"išÒ[Ú8žë\F¹@-?v"ÔU”,ìöžkÿ {I‡£šÍ?e ríV ?> ......................................... ............................................................................. ???????????????????????????????????? ???????????????????????????????????? U:RDoc::AnyMethod[iI" select:ETI"Kernel#select;TF: publico:RDoc::Markup::Document: @parts[6o:RDoc::Markup::Paragraph; [ I"JInvokes system call {select(2)}[https://linux.die.net/man/2/select], ;TI"/which monitors multiple file descriptors, ;TI"7waiting until one or more of the file descriptors ;TI"3becomes ready for some class of I/O operation.;To:RDoc::Markup::BlankLineo; ; [I"&Not implemented on all platforms.;T@o; ; [I"DEach of the arguments +read_ios+, +write_ios+, and +error_ios+ ;TI"is an array of IO objects.;T@o; ; [I"NArgument +timeout+ is a numeric value (such as integer or float) timeout ;TI"interval in seconds.;T@o; ; [I"DThe method monitors the \IO objects given in all three arrays, ;TI"#waiting for some to be ready; ;TI"2returns a 3-element array whose elements are:;T@o:RDoc::Markup::List: @type: BULLET: @items[o:RDoc::Markup::ListItem: @label0; [o; ; [I"FAn array of the objects in +read_ios+ that are ready for reading.;To;;0; [o; ; [I"GAn array of the objects in +write_ios+ that are ready for writing.;To;;0; [o; ; [I"DAn array of the objects in +error_ios+ have pending exceptions.;T@o; ; [I"NIf no object becomes ready within the given +timeout+, +nil+ is returned.;T@o; ; [ I"I\IO.select peeks the buffer of \IO objects for testing readability. ;TI"EIf the \IO buffer is not empty, \IO.select immediately notifies ;TI"Jreadability. This "peek" only happens for \IO objects. It does not ;TI"@happen for IO-like objects such as OpenSSL::SSL::SSLSocket.;T@o; ; [ I"FThe best way to use \IO.select is invoking it after non-blocking ;TI"Hmethods such as #read_nonblock, #write_nonblock, etc. The methods ;TI"Araise an exception which is extended by IO::WaitReadable or ;TI"FIO::WaitWritable. The modules notify how the caller should wait ;TI"Hwith \IO.select. If IO::WaitReadable is raised, the caller should ;TI"Iwait for reading. If IO::WaitWritable is raised, the caller should ;TI"wait for writing.;T@o; ; [I"So, IO#write(two or more bytes) can block after ;TI"Kwritability is notified by \IO.select. IO#write_nonblock is required ;TI"to avoid the blocking.;T@o; ; [I"GBlocking write (#write) can be emulated using #write_nonblock and ;TI"GIO.select as follows: IO::WaitReadable should also be rescued for ;TI"2SSL renegotiation in OpenSSL::SSL::SSLSocket.;T@o;; [I"while 0 < string.bytesize ;TI" begin ;TI"2 written = io_like.write_nonblock(string) ;TI" rescue IO::WaitReadable ;TI" IO.select([io_like]) ;TI" retry ;TI" rescue IO::WaitWritable ;TI"# IO.select(nil, [io_like]) ;TI" retry ;TI" end ;TI". string = string.byteslice(written..-1) ;TI" end ;T;0o; ; [I" Example:;T@o;; [I"rp, wp = IO.pipe ;TI"mesg = "ping " ;TI"100.times { ;TI"H # IO.select follows IO#read. Not the best way to use IO.select. ;TI"' rs, ws, = IO.select([rp], [wp]) ;TI" if r = rs[0] ;TI" ret = r.read(5) ;TI" print ret ;TI" case ret ;TI" when /ping/ ;TI" mesg = "pong\n" ;TI" when /pong/ ;TI" mesg = "ping " ;TI" end ;TI" end ;TI" if w = ws[0] ;TI" w.write(mesg) ;TI" end ;TI"} ;T;0o; ; [I" Output:;T@o;; [ I"ping pong ;TI"ping pong ;TI"ping pong ;TI"(snipped) ;TI" ping;T;0: @fileI" io.c;T:0@omit_headings_from_table_of_contents_below0I"XIO.select(read_ios, write_ios = [], error_ios = [], timeout = nil) -> array or nil ;T0[I"$(p1, p2 = v2, p3 = v3, p4 = v4);T@FI" Kernel;TcRDoc::NormalModule00