[PATCH] vkd3d: Don't allow concurrent writes to descriptors.
Derek Lesho
dlesho at codeweavers.com
Thu Sep 12 08:42:25 CDT 2019
On 9/11/19 11:11 PM, Conor McCarthy wrote:
> On Thu, Sep 12, 2019 at 5:18 AM Derek Lesho <dlesho at codeweavers.com
> <mailto:dlesho at codeweavers.com>> wrote:
>
> + for (unsigned int i = 0; i < desc->NumDescriptors; i++)
> + {
> + struct d3d12_desc *cur_desc = (struct d3d12_desc *)
> (object->descriptors + (i * descriptor_size));
> + pthread_spinlock_t *lock =
> vkd3d_malloc(sizeof(pthread_spinlock_t));
> +
> + pthread_spin_init(lock, PTHREAD_PROCESS_PRIVATE);
> + cur_desc->lock = lock;
> + }
>
>
> On Linux, pthread_spinlock_t is just a single int (not sure about the
> Mac equivalent but probably similar). It's more efficient to declare
> cur_desc->lock as a pthread_spinlock_t rather than a pointer to one in
> allocated memory.
Yes, however the entire d3d12_desc structure is memset away, including
the lock. Another solution to this problem would involve using
"descriptor headers" that go in between the _desc structures in
heap->descriptors.
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