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d3d12: Implement pipe_screen::fence_get_win32_event

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Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Pohsiang (John) Hsu <pohhsu@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40764>
This commit is contained in:
Silvio Vilerino 2026-04-01 14:01:47 -04:00 • committed by Marge Bot
parent 47ac871e84
commit 9246c66c61
1 changed files with 27 additions and 0 deletions
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27
src/gallium/drivers/d3d12/d3d12_screen.cpp
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@ -1223,6 +1223,32 @@ static void* d3d12_fence_get_win32_handle(struct pipe_screen *pscreen,
return (void*) shared_handle;
}
static void *d3d12_fence_get_win32_event([[maybe_unused]] struct pipe_screen *pscreen,
struct pipe_fence_handle *fence_handle)
{
struct d3d12_fence* fence = (struct d3d12_fence*) fence_handle;
if (fence->type != PIPE_FD_TYPE_NATIVE_SYNC)
return NULL;
/* Create a new manual-reset event rather than duplicating the fence's
* auto-reset event. Duplicated handles share the same kernel object, so
* a wait on any handle consumes the single auto-reset signal — causing
* other waiters to hang.
* A dedicated manual-reset event with its own SetEventOnCompletion avoids
* this by giving each caller an independent signal. */
HANDLE event = CreateEvent(NULL, TRUE /* bManualReset */, FALSE, NULL);
if (!event)
return NULL;
if (FAILED(fence->cmdqueue_fence->SetEventOnCompletion(fence->value, event))) {
CloseHandle(event);
return NULL;
}
return event;
}
#endif
static void
@ -1309,6 +1335,7 @@ d3d12_init_screen_base(struct d3d12_screen *screen, struct sw_winsys *winsys, LU
screen->base.interop_export_object = d3d12_interop_export_object;
#ifdef _WIN32
screen->base.fence_get_win32_handle = d3d12_fence_get_win32_handle;
screen->base.fence_get_win32_event = d3d12_fence_get_win32_event;
#endif
screen->base.query_memory_info = d3d12_query_memory_info;