[boost] Re: Boost.Threads static linking FYI

From: Edward Diener (eddielee_at_[hidden])
Date: 2004-07-16 22:34:40

Michael Glassford wrote:
> Michael Glassford wrote:
>
>> I've made some changes to the Boost.Threads static linking support on
>> Win32. Previously I had added back support for static linking, but
>> without thread-specific storage classes. Now I've added the
>> thread-specific storage classes back in, and exposed two functions
>> that need to be called at the appropriate time:
>>
>> The function on_thread_exit() should be called when a thread exists,
>> *in the context of the exiting thread*. The function
>> on_process_exit()
>> should be called when the process exit. If these functions are not
>> called at the appropriate time, leaks may occur. If you know you
>> don't need tss cleanup, of course you can just omit to call these
>> functions.
>>
>> In addition, Boost.Threads static library on Win32 requires the user
>> of the library to define a function called
>> tss_cleanup_implemented(); if it is not defined, a link error
>> results. The only purpose of this function is as a "link-time
>> assertion": the linker error stating that the
>> function is missing warns the the user of the necessity of calling
>> the cleanup functions. In addition, if Boost.Threads later
>> implements tss cleanup in the static library, the linker's duplicate
>> symbol error
>> should warn the user that their custom implementation is no longer
>> needed.
>>
>> Comments?
>
> Replying to myself: I forgot to mention: it's easy enough to make
> threads created by Boost.Threads call on_thread_exit() after the
> thread function exits.

Please explain how if there is an easy method.

> Does anyone see any drawbacks to doing this?

The only drawback is the typical one of a thread being killed before it can
exit.