Ideas for runtime loading of shared libraries.

[Sean Kelly]

I thought C++0x allowed TLS class instances?

Sent from my iPhone

On Jan 3, 2012, at 9:51 AM, "Martin Nowak" <dawg at dawgfoto.de> wrote:

> On Tue, 03 Jan 2012 18:44:27 +0100, Jacob Carlborg <doob at me.com> wrote:
> 
>> On 2012-01-03 17:53, Martin Nowak wrote:
>>> Yes most, but not all.
>>> The core issue here is that C++'s __thread doesn't allow dynamic
>>> initializers,
>>> thus there is no infrastructure to do such things. And really a clean
>>> approach
>>> would be to extend libc/ld.so.
>> 
>> First, __thread isn't supported in Mac OS X (if we're talking about that). For all the operating systems that do support TLS I'm pretty sure that TLS and dynamic libraries work.
>> 
>> This documentation:
>> 
>> http://www.akkadia.org/drepper/tls.pdf
>> 
>> mentions several different TLS modes, some used for dynamic libraries and some used for other cases.
>> 
> 
> C++ takes a very simple approach here.
> You can have
>    __thread int a = 3;
> but not
>    __thread int a = geta();
>    error: 'a' is thread-local and so cannot be dynamically initialized