D hates to be dynamic linked

Walter Bright newshound1 at digitalmars.com
Wed Feb 24 11:50:06 PST 2010


Don wrote:
> Rainer Schuetze wrote:
>> Hi,
>>
>> as I'm also hitting some problems with DLLs, here are some issues that 
>> I am now aware of (sorry, can't tell for linux shared objects, but I 
>> guess the situation is similar):
>>
>> 1. For D2, there is a major blocker with DLLs loaded after 
>> intialization on XP because of no TLS support from the OS. There is a 
>> simple workaround for single-threaded application (just setting FS:2c 
>> to a pointer to _tlsstart), but I'm considering a full emulation of 
>> the TLS initialization.
> 
> That's incredibly difficult. Have you read this?
> 
> http://www.nynaeve.net/?p=189
> 
> It'd be great if you can get it to work. But I fear that for Win32, DMD 
> is going to have to switch to explicit TLS.


I talked to the guy who wrote that. He wrote some workaround code to 
make TLS work on older Windows versions, and I asked him if we could 
license it. He was reluctant, saying it was experimental only.

So yeah, rolling our own may be the only viable option.



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