re PR libstdc++/7445 (poor performance of std::locale::classic() in multi-threaded applications)

2002-08-15  Benjamin Kosnik  <bkoz@redhat.com>

	* include/ext/stdio_filebuf.h (stdio_filebuf): Explicitly set
	_M_buf_size_opt to zero when unbuffering.
	* include/bits/fstream.tcc (filebuf::showmanyc): Simplify.
	Consistency checks for _M_buf_size_opt.

	Revert PR libstdc++/7445
	* src/locale.cc (locale::classic): Revert.

	* docs/html/17_intro/TODO: Add.

From-SVN: r56365