Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c++ > #84310

Re: Found a undocumented way to have thread_local variables in DLLs

From "R.Wieser" <address@not.available>
Newsgroups comp.lang.c++, comp.os.ms-windows.programmer.win32
Subject Re: Found a undocumented way to have thread_local variables in DLLs
Date 2022-05-28 15:01 +0200
Organization Aioe.org NNTP Server
Message-ID <t6t70u$osu$1@gioia.aioe.org> (permalink)
References (2 earlier) <t6rdsv$5qu$1@dont-email.me> <t6rfn5$i19$1@dont-email.me> <t6rg35$k2t$2@dont-email.me> <t6smdc$a7a$2@gioia.aioe.org> <t6smvo$gb9$1@dont-email.me>

Cross-posted to 2 groups.

Show all headers | View raw

Bonita,

> You don't understand the difference between normal local variables and 
> local variables being declared as thread-local.

I think I do, but if you say so.

>> In a programs thread - the main one or ones later or ones created by it -
>> you could just store that memory pointer in a variable local to that 
>> thread.
>
> That woudln't make any sense because this pointer isn't thread-local
> itself.

Ofcourse it isn't.  It can be used from anywhere in your program.  But you 
are *making* it thread-local by storing it into a TLS element - which can 
only be accessed by the thread its stored in.

I also thought to have read that you would be using that allocated memory 
for stuff related to a certain thread - meaning that if any other thread 
would try to use it it would probably barf and crash the whole program.  And 
in my book that makes the pointer itself "thread local".

>> It will still be there and valid when you reach the functions or threads
>> end.
>
> You're ultimately stupid.

*Ofcourse* I am.

Well, good luck with your programming. You'll need it trying to figure out 
everything yourself.

Regards,
Rudy Wieser

Back to comp.lang.c++ | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-27 19:22 +0200
  Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-27 22:39 +0200
    Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-27 22:56 +0200
      Re: Found a undocumented way to have thread_local variables in DLLs "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-05-27 14:26 -0700
        Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-27 23:33 +0200
          Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-28 10:27 +0200
            Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-28 10:37 +0200
              Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-28 15:01 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-28 17:27 +0200
      Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-28 10:15 +0200
        Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-28 10:37 +0200
          Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-28 15:10 +0200
            Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-28 17:27 +0200
              Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-28 18:40 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-28 19:28 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-29 13:22 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-29 13:30 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-29 14:41 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-29 14:56 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs "R.Wieser" <address@not.available> - 2022-05-29 17:13 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Freethinker <freethinker@mymail.com> - 2022-05-29 15:09 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-29 17:38 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs muttley@dastardlyhq.com - 2022-05-29 15:47 +0000
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-29 18:17 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-05-29 18:56 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-29 19:21 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-05-29 19:26 +0200
                Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-30 11:30 +0200
  Re: Found a undocumented way to have thread_local variables in DLLs Mr Flibble <flibble@reddwarf.jmc> - 2022-05-27 21:48 +0100
    Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-27 23:01 +0200
  Re: Found a undocumented way to have thread_local variables in DLLs Paavo Helde <eesnimi@osa.pri.ee> - 2022-05-28 00:02 +0300
    Re: Found a undocumented way to have thread_local variables in DLLs Bonita Montero <Bonita.Montero@gmail.com> - 2022-05-27 23:32 +0200

csiph-web