re PR libstdc++/24469 (Possible race condition in mt_allocator causing SIGSEGV)

re PR libstdc++/24469 (Possible race condition in mt_allocator causing SIGSEGV)

2006-09-02  Paolo Carlini  <pcarlini@suse.de>
	    Richard Guenther  <rguenther@suse.de>

	PR libstdc++/24469
	* src/mt_allocator.cc (__pool<true>::_M_reserve_block,
	__pool<true>::_M_reclaim_block): Fix the logic to avoid
	races, exploit atomic counters stored in second part of
	the memory pointed by _M_used.
	(__pool<true>::_M_initialize): Adjust _M_used allocation.
	* include/ext/mt_allocator.h (__pool<true>::_Bin_record):
	Update comment.

Co-Authored-By: Richard Guenther <rguenther@suse.de>
From-SVN: r116660