At 11:42 PM +0100 2/12/06, Pavel Vozenilek wrote:
"Kim Barrett" wrote:
The object allocation mechanisms provided by shmem are, surprise, dynamic allocation. If a system design forbids dynamic allocation, there is nothing magical about the shmem library's allocation mechanisms that would make it more acceptable in such a system.
shmem, being so limited, may provide lower and easier to estimate upper limits than dynamic allocation provided by OS/compiler RTL.
The shmem allocators are probably inappropriate for that. For one thing, they are designed so that their internal data structures can live in shared memory, using offset_ptr and the like. That's just unnecessary overhead if one isn't actually using shared memory. It is also irrelevant to the two-phase vs RAII construction question for the shared memory objects.