class BufferCollection
Defined at line 1953 of file fidling/gen/sdk/fidl/fuchsia.sysmem/fuchsia.sysmem/cpp/fidl/fuchsia.sysmem/cpp/markers.h
BufferCollection is a connection directly from a participant to sysmem re.
a logical BufferCollection; typically the logical BufferCollection is shared
with other participants. In other words, an instance of the BufferCollection
interface is a view of a "logical buffer collection".
This connection exists to facilitate async indication of when the logical
BufferCollection has been populated with buffers.
Also, the channel's closure by the server is an indication to the client
that the client should close all VMO handles that were obtained from the
BufferCollection ASAP.
Also, this interface may in future allow specifying constraints in other
ways, and may allow for back-and-forth negotiation of constraints to some
degree.
This interface may in future allow for more than 64 VMO handles per
BufferCollection, but currently the limit is 64.
This interface may in future allow for allocating/deallocating single
buffers.
Some initiators may wait a short duration until all old logical
BufferCollection VMO handles have closed (or until the short duration times
out) before allocating a new BufferCollection, to help control physical
memory fragmentation and avoid overlap of buffer allocation lifetimes for
the old and new collections. Collections can be large enough that it's worth
avoiding allocation overlap (in time).
Public Members
static Openness kOpenness