Re: [boost] thread_specific_ptr prototype (was: Re: [thread] thread_specific_ptr performance)

Subject: Re: [boost] thread_specific_ptr prototype (was: Re: [thread] thread_specific_ptr performance)
From: Stefan Strasser (strasser_at_[hidden])
Date: 2010-01-13 09:28:35

Am Wednesday 13 January 2010 15:08:29 schrieben Sie:
> Am Tuesday 12 January 2010 21:39:16 schrieb vicente.botet:
> <<
> prototype::thread_specific_ptr<int> ptr;
> int f(){
>   return *ptr;
> }
>
>
> <<
> _Z1fv:
> .LFB4216:
>         pushl   %ebp
> .LCFI26:
>         movl    %gs:_ZN5boost9prototype6detail10tss_vectorE_at_NTPOFF, %edx
>         movl    ptr+4, %eax
>         movl    %esp, %ebp
> .LCFI27:
>         popl    %ebp
>         movl    (%edx), %edx
>         leal    (%eax,%eax,2), %eax
>         movl    (%edx,%eax,4), %eax
>         movl    (%eax), %eax
>         ret

one of the indirections could be removed by storing &vector[0] in the 
thread-local storage instead of &vector.