linux-kernel - Re: Which function returns LWP in Linux.

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Message-Id: <20100517160319.A195.A69D9226@jp.fujitsu.com>
Date:	Mon, 17 May 2010 16:03:17 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Srinivas Nayak <sinu.nayak2001@...il.com>
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org
Subject: Re: Which function returns LWP in Linux.

> Hi,
> 
> For a process, we have different PIDs. For threads under a single
> processes, we have different LWP id, but same PID in Linux.
> ex.
> 
> root@pc:/home/srinivas# ps -eLf
> UID        PID  PPID     LWP  C STIME       TIME     CMD
> root       100     1     100  0 May13       00:00:02 ./a.out
> root       100     1     102  0 May13       00:00:00 ./a.out
> 
> getpid() function returns PID of a process.
> Which function retuns LWP id for thread?

gettid()

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