id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
1958	thread_specific_ptr lacks support for NULL cleanup function	Bryan Green <bryan.d.green@…>	Anthony Williams	"Passing a null pointer as the cleanup_function argument to the thread_specific_ptr constructor
leads to a null dereference and a program crash.

Use of a null cleanup function is well defined in the pthread API: it means that no cleanup is to
be performed.  Boost::Thread currently lacks this mode, requiring the programmer to define a specialized empty function any time a thread_specific_ptr is created where no cleanup is desired.

I'm filing this as a bug, since it represents a common practice, well supported and documented in the pthread API, which in boost leads to a program crash.

I'm attaching a patch representing a potential implementation of NULL-cleanup-function support.
"	Bugs	closed	Boost 1.36.0	thread	Boost Development Trunk	Problem	fixed	cleanup_function tss thread_specific_ptr