Ports the event-queue rework from the archived silent-hill-minimal branch
(968e9606, 9e3abb12, 2be9cfbf, f157a115) onto current upstream. The equeue
implementation had not been touched upstream since that branch forked, so
none of it had landed.
Behaviour fixed:
- Per-waiter event reservation. A blocked waiter used to wake on "the queue
has any pending event" (TryWake => HasPendingEvents) and then re-read the
queue on resume, so a woken waiter could find the event already drained by
another waiter and park again with the wake consumed. Events are now
reserved to the waiter they are delivered to.
- Level-triggered events are preserved instead of being cleared by an
unrelated read; only events that declare clear-on-read reset their trigger
state.
- Queued interrupts are bound to the registration generation that produced
them, so an event registered after a queue was reused cannot consume an
interrupt raised for the previous registration.
- Deleting an equeue now terminates its waiters instead of leaving them
blocked on a handle that no longer resolves.
- sceKernelTriggerUserEvent stores its third argument in the event's udata
(0x18) rather than its data word (0x10). The guest reads it back with
sceKernelGetEventUserData, which loads 0x18, so every triggered user event
previously read back as 0. This matches the reference behaviour in shadPS4,
where TriggerEvent takes udata and sceKernelGetEventUserData returns
ev->udata. The upstream test asserting the data word is updated, since it
encoded the inconsistency rather than the ABI.
KernelPthreadState gains TryGetCurrentThreadIdentity and a new
KernelSyncTraceFormatter carries the shared, opt-in diagnostic formatting the
ported code calls; both are gated behind the existing trace flag and do no
work when it is off.
Tests: 662 pass, 0 fail (SharpEmu.Libs.Tests 588 -> 598).
kuba