Thread join() method

6 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Join, merge, fill NULL the void columns of multiples files like sql "LEFT JOIN" by using awk

Hello, This post is already here but want to do this with another way Merge multiples files with multiples duplicates keys by filling "NULL" the void columns for anothers joinning files file1.csv: 1|abc 1|def 2|ghi 2|jkl 3|mno 3|pqr file2.csv: 1|123|jojo 1|NULL|bibi...

2. UNIX for Dummies Questions & Answers

How to use the the join command to join multiple files by a common column

Hi, I have 20 tab delimited text files that have a common column (column 1). The files are named GSM1.txt through GSM20.txt. Each file has 3 columns (2 other columns in addition to the first common column). I want to write a script to join the files by the first common column so that in the...

3. Solaris

svc:/network/physical:default: Method "/lib/svc/method/net-physical" failed with exit status 96. [ n

After a memory upgrade all network interfaces are misconfigued. How do i resolve this issue. Below are some out puts.thanks. ifconfig: plumb: SIOCLIFADDIF: eg000g0:2: no such interface # ifconfig eg1000g0:2 plumb ifconfig: plumb: SIOCLIFADDIF: eg1000g0:2: no such interface # ifconfig...

4. UNIX for Dummies Questions & Answers

Join 2 files with multiple columns: awk/grep/join?

Hello, My apologies if this has been posted elsewhere, I have had a look at several threads but I am still confused how to use these functions. I have two files, each with 5 columns: File A: (tab-delimited) PDB CHAIN Start End Fragment 1avq A 171 176 awyfan 1avq A 172 177 wyfany 1c7k A 2 7...

5. Programming

sql,multiple join,outer join issue

example sql: select a.a1,b.b1,c.c1,d.d1,e.e1 from a left outer join b on a.x=b.x left outer join c on b.y=c.y left outer join d on d.z=a.z inner join a.t=e.t I know how single outer or inner join works in sql. But I don't really understand when there are multiple of them. can...

6. Shell Programming and Scripting

join (pls help on join command)

Hi, I am a new learner of join command. Some result really make me confused. Please kindly help me. input: file1: LEO oracle engineer 210375 P.Jones Office Runner ID897 L.Clip Personl Chief ID982 S.Round UNIX admin ID6 file2: Dept2C ID897 6 years Dept5Z ID982 1 year Dept3S ID6 2...

LEARN ABOUT REDHAT

thread::semaphore

Thread::Semaphore(3pm)					 Perl Programmers Reference Guide				    Thread::Semaphore(3pm)

NAME

       Thread::Semaphore - thread-safe semaphores

SYNOPSIS

	   use Thread::Semaphore;
	   my $s = new Thread::Semaphore;
	   $s->up;     # Also known as the semaphore V -operation.
	   # The guarded section is here
	   $s->down;   # Also known as the semaphore P -operation.

	   # The default semaphore value is 1.
	   my $s = new Thread::Semaphore($initial_value);
	   $s->up($up_value);
	   $s->down($up_value);

DESCRIPTION

       Semaphores provide a mechanism to regulate access to resources. Semaphores, unlike locks, aren't tied to particular scalars, and so may be
       used to control access to anything you care to use them for.

       Semaphores don't limit their values to zero or one, so they can be used to control access to some resource that there may be more than one
       of. (For example, filehandles). Increment and decrement amounts aren't fixed at one either, so threads can reserve or return multiple
       resources at once.

FUNCTIONS AND METHODS

       new
       new NUMBER
	       "new" creates a new semaphore, and initializes its count to the passed number. If no number is passed, the semaphore's count is set
	       to one.

       down
       down NUMBER
	       The "down" method decreases the semaphore's count by the specified number, or by one if no number has been specified. If the sema-
	       phore's count would drop below zero, this method will block until such time that the semaphore's count is equal to or larger than
	       the amount you're "down"ing the semaphore's count by.

       up
       up NUMBER
	       The "up" method increases the semaphore's count by the number specified, or by one if no number has been specified. This will
	       unblock any thread blocked trying to "down" the semaphore if the "up" raises the semaphore count above the amount that the "down"s
	       are trying to decrement it by.

perl v5.8.0							    2002-06-01						    Thread::Semaphore(3pm)

Solaris BigAdmin RSS