id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5230	Interprocess shared memory between 32 and 64 bit processes	tgermer@…	Ion Gaztañaga	"For sharing memory between 32 and 64 bit processes, all structures in shared memory must have the same binary layout with matching size_type and difference_type. In addition, offset_ptr must be 64bit in this case. 

This is a patch that parameterizes offset_ptr to explicitly accept its difference_type along with its internal offset_type. This difference_type (and the according size_type) is propagated to all other affected structures (memory algorithms, allocators, containers, ...). In 32/64 bit shared environments, difference_type should be set to {{{int}}} and offset_type to {{{unsigned __int64}}}. The default values are {{{ptrdiff_t}}} and {{{size_t}}}. 

Note: rbtree_best_fit also uses offset_type to store its internal block sizes, because these need to wrap-around correctly on 64bit machines."	Feature Requests	reopened	To Be Determined	interprocess	Boost Development Trunk	Problem		shared memory 32 64 bit	aschoedl@…