Am Mon, 19 Mar 2012 16:14:36 +0000 schrieb Iain Buclaw <ibuc...@ubuntu.com>:
> > Initial things to think about on the top of my head: > > * Speed to access symbols. It needs the normal code to access the TLS struct / get the address of the TLS struct + one add instruction which adds the offset for the specific variable. So it should be fast enough. > * Accessing thread local symbols across modules. Do we have to use module-local symbols? If we could use symbols with unique, mangled names, we could just access that symbol+offset from every module. This assumes the d/di files provide enough information to calculate the offset. > > > Just to clarify: 'module-level' as in D module(/object file) or as > > in one variable per shared library/application? If we can support > > one variable per shared library/application that'd be great, as we > > will then only have a few tls ranges for the gc. > > > > Per module - see the code that initialises _Dmodule_ref. We're really > just adding two extra fields to that which includes starting address > and size. >
