Note: If ph is non-NULL, the client should notify
when IO readiness events occur by calling
fuse_notify_poll() with the specified ph.
Regardless of the number of times poll with a non-NULL ph
is received, single notification is enough to clear all.
Notifying more times incurs overhead but doesn't harm
correctness.
The callee is responsible for destroying ph with
$(LLW_REF fuse_pollhandle_destroy) when no longer in use.
Poll for IO readiness events.
Note: If ph is non-NULL, the client should notify when IO readiness events occur by calling fuse_notify_poll() with the specified ph.
Regardless of the number of times poll with a non-NULL ph is received, single notification is enough to clear all. Notifying more times incurs overhead but doesn't harm correctness.
The callee is responsible for destroying ph with $(LLW_REF fuse_pollhandle_destroy) when no longer in use.