04-26-2006
I have found solns for most platforms --
Solaris - read psinfo struc (refer proc man page)
AIX- Use getprocs() func
HP - Use pstat_getproc func.
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LEARN ABOUT LINUX
set_tid_address
SET_TID_ADDRESS(2) Linux Programmer's Manual SET_TID_ADDRESS(2)
NAME
set_tid_address - set pointer to thread ID
SYNOPSIS
#include <linux/unistd.h>
long set_tid_address(int *tidptr);
DESCRIPTION
The kernel keeps for each process two values called set_child_tid and clear_child_tid that are NULL by default.
set_child_tid
If a process is started using clone(2) with the CLONE_CHILD_SETTID flag, set_child_tid is set to child_tidptr, the fifth argument of that
system call.
When set_child_tid is set, the very first thing the new process does is writing its PID at this address.
clear_child_tid
If a process is started using clone(2) with the CLONE_CHILD_CLEARTID flag, clear_child_tid is set to child_tidptr, the fifth argument of
that system call.
The system call set_tid_address() sets the clear_child_tid value for the calling process to tidptr.
When clear_child_tid is set, and the process exits, and the process was sharing memory with other processes or threads, then 0 is written
at this address, and a futex(child_tidptr, FUTEX_WAKE, 1, NULL, NULL, 0); call is done. (That is, wake a single process waiting on this
futex.) Errors are ignored.
RETURN VALUE
set_tid_address() always returns the PID of the calling process.
ERRORS
set_tid_address() always succeeds.
VERSIONS
This call is present since Linux 2.5.48. Details as given here are valid since Linux 2.5.49.
CONFORMING TO
This system call is Linux-specific.
SEE ALSO
clone(2), futex(2)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2004-09-10 SET_TID_ADDRESS(2)