The goal is to simplify the CS queue handling: with this and the following
changes operations are always started by d3d12_command_queue_flush_ops(),
in order to make further refactoring easier.
Notice that while with this change executing an operation on an empty CS
queue is a bit less efficient, it doesn't require more locking. On the other
hand, this change paves the road for executing CS operations without holding
the queue lock.
Otherwise it could be added more than once.
Note that the deleted comment is wrong: between when d3d12_command_queue_flush_ops()
returns and when the queue is added back to the blocked list, the queue
might have been pushed to and flushed an arbitrary number of times.
In practice they never fail. If they fail, it means that there
is some underlying platform problem and there is little we can do
anyway. Under pthreads function prototypes allow returning failure,
but that's only used for "error checking" mutexes, which we
don't use.
On the other hand, error handling in vkd3d is rather inconsistent:
sometimes the errors are ignored, sometimes logged, sometimes
passed to the caller. It's hard to handle failures appropriately
if you can't even keep your state consistent, so I think it's
better to avoid trying, assume that synchronization primitives do
not fail and at least have consistent logging if something goes
wrong.
A pointer to the containing descriptor heap can be derived from this
information.
PE build of vkd3d uses Windows critical sections for synchronisation,
and these slow down on the very high lock/unlock rate during multithreaded
descriptor copying in Shadow of the Tomb Raider. This patch speeds up the
demo by about 8%. By comparison, using SRW locks in the allocators and
locking them for read only where applicable is about 4% faster.
Once a event is signaled, the corresponding struct vkd3d_waiting_event
entry is considered dead and could be overwritten, so it's not safe to
keep a pointer to it in d3d12_fence_SetEventOnCompletion(). Instead,
keep the latch bit in d3d12_fence_SetEventOnCompletion() and put a
pointer to it in struct vkd3d_waiting_event.
Fixes reflections in Control appearing with only their red component.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52146
Signed-off-by: Conor McCarthy <cmccarthy@codeweavers.com>
Pthread mandates that a mutex must be unlocked before being destroyed.
In pratice I doubt this make a difference on any platform (certainly
it doesn't on Linux), but let's comply to standards.
An unblocking Signal() on the CPU must be handled after the blocked op
is written, or the op will not be flushed until the next signal.
The device is locked while the fence is already locked, so the fence must
never be locked after locking the device. Currently this never occurs.
Signed-off-by: Conor McCarthy <cmccarthy@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
