Hello, i am trying to the set the name of thread with:

    import core.thread;
    auto thisThread = Thread.getThis();
    thisThread.name = "kiwi";

but GDB prints the name of the programm ("helloworld")

    [Thread debugging using libthread_db enabled]
    Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
    Edit source/app.d to start your project.
    ^C
    Program received signal SIGINT, Interrupt.
    D main () at source/app.d:17
    17		}
    (gdb) info threads
      Id   Target Id         Frame
    * 1    Thread 0x7ffff7fd0800 (LWP 3232) "helloworld" D main () at source/app.d:17

Next thing i tried was calling pthread_setname_np (Linux) but it seams that is not defined in phobos, so i tried to delcare it by my self:

    import core.sys.posix.pthread;
    import std.string;
    extern(C) int pthread_setname_np(pthread_t, const char*);
    pthread_setname_np(pthread_self(), toStringz("thread_name"));

but this gives me
   helloworld ~master: building configuration "application"...
   dmd -c -of.dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o -debug -g -w -version=Have_helloworld -Isource/ source/app.d source/kiwi.d -vcolumns
   Linking...
   dmd -of.dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o -L--no-as-needed -g
   .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o: In function `_Dmain':
/home/keywan/hello_world/source/app.d:13: undefined reference to `_D3app4mainFZ18pthread_setname_npUmxPaZi'
   collect2: error: ld returned 1 exit status
   --- errorlevel 1
   FAIL .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/ helloworld executable
   dmd failed with exit code 1.

sorry for asking stupid questions but my background is more PHP,Perl,Java...
any help would be appreciated. (context i am trying to make debugging easier by giving the threads names)

On Saturday, 9 January 2016 at 11:02:53 UTC, Keywan Ghadami wrote:
> Hello, i am trying to the set the name of thread with:
>
>     import core.thread;
>     auto thisThread = Thread.getThis();
>     thisThread.name = "kiwi";
>
> but GDB prints the name of the programm ("helloworld")
>
>     [Thread debugging using libthread_db enabled]
>     Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
>     Edit source/app.d to start your project.
>     ^C
>     Program received signal SIGINT, Interrupt.
>     D main () at source/app.d:17
>     17		}
>     (gdb) info threads
>       Id   Target Id         Frame
>     * 1    Thread 0x7ffff7fd0800 (LWP 3232) "helloworld" D main () at source/app.d:17
>
> Next thing i tried was calling pthread_setname_np (Linux) but it seams that is not defined in phobos, so i tried to delcare it by my self:
>
>     import core.sys.posix.pthread;
>     import std.string;
>     extern(C) int pthread_setname_np(pthread_t, const char*);
>     pthread_setname_np(pthread_self(), toStringz("thread_name"));
>
> but this gives me
>    helloworld ~master: building configuration "application"...
>    dmd -c -of.dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o -debug -g -w -version=Have_helloworld -Isource/ source/app.d source/kiwi.d -vcolumns
>    Linking...
>    dmd -of.dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o -L--no-as-needed -g
>    .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/helloworld.o: In function `_Dmain':
> /home/keywan/hello_world/source/app.d:13: undefined reference to `_D3app4mainFZ18pthread_setname_npUmxPaZi'
>    collect2: error: ld returned 1 exit status
>    --- errorlevel 1
>    FAIL .dub/build/application-debug-linux.posix-x86_64-dmd_2069-AAC406C4728034581B43AEC547EAA8E7/ helloworld executable
>    dmd failed with exit code 1.
>
> sorry for asking stupid questions but my background is more PHP,Perl,Java...
> any help would be appreciated. (context i am trying to make debugging easier by giving the threads names)

I tried your code with a little addition as follows:

[code]
import core.sys.posix.pthread;
import std.string;
import std.stdio;

extern(C) int pthread_setname_np(pthread_t, const char*);

void main(){
    pthread_setname_np(pthread_self(), toStringz("thread_name"));
    readln();
}
[/code]

Compiled it with "dmd blah.d", and then run "./blah".

Because there is "readln" there, I opened another terminal and
used "ps H -o 'pid tid cmd comm'".

In the output:

 PID   TID CMD                         COMMAND
5089  5089 ./blah                      thread_name

So, it works.

On Saturday, 9 January 2016 at 17:30:47 UTC, tcak wrote:
> I tried your code with a little addition as follows:
>
> [code]
> import core.sys.posix.pthread;
> import std.string;
> import std.stdio;
>
> extern(C) int pthread_setname_np(pthread_t, const char*);
>
> void main(){
>     pthread_setname_np(pthread_self(), toStringz("thread_name"));
>     readln();
> }
> [/code]
>
> Compiled it with "dmd blah.d", and then run "./blah".
>
> Because there is "readln" there, I opened another terminal and
> used "ps H -o 'pid tid cmd comm'".
>
> In the output:
>
>  PID   TID CMD                         COMMAND
> 5089  5089 ./blah                      thread_name
>
> So, it works.

tcak,
thank you very much, it works!

Maybe interesting for others: The reason for the error message i had was, that i declared
    extern(C) int pthread_setname_np(pthread_t, const char*);
within the main method.