[PATCH v4 6/7] dxgi: Make the frame latency waitable a semaphore.

[Giovanni Mascellani]

From: Giovanni Mascellani

As it should be, given that it is supposed to keep the count of
how many frames are currently in flight.
---
 dlls/dxgi/swapchain.c  | 24 ++++++++++++------------
 dlls/dxgi/tests/dxgi.c |  4 +---
 2 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/dlls/dxgi/swapchain.c b/dlls/dxgi/swapchain.c
index c5fc4fad337..66a777b4a90 100644
--- a/dlls/dxgi/swapchain.c
+++ b/dlls/dxgi/swapchain.c
@@ -1191,7 +1191,7 @@ struct d3d12_swapchain
     DXGI_SWAP_CHAIN_FULLSCREEN_DESC fullscreen_desc;
     LONG in_set_fullscreen_state;

-    HANDLE frame_latency_event;
+    HANDLE frame_latency_semaphore;

uint64_t frame_number;
     uint32_t frame_latency;
@@ -2053,8 +2053,8 @@ static void d3d12_swapchain_destroy(struct d3d12_swapchain *swapchain)
     if (swapchain->present_fence)
         ID3D12Fence_Release(swapchain->present_fence);

-    if (swapchain->frame_latency_event)
-        CloseHandle(swapchain->frame_latency_event);
+    if (swapchain->frame_latency_semaphore)
+        CloseHandle(swapchain->frame_latency_semaphore);

if (swapchain->command_queue)
         ID3D12CommandQueue_Release(swapchain->command_queue);
@@ -2290,11 +2290,11 @@ static HRESULT d3d12_swapchain_op_present_execute(struct d3d12_swapchain *swapch
         return hresult_from_vk_result(vr);
     }

-    if (swapchain->frame_latency_event)
+    if (swapchain->frame_latency_semaphore)
     {
-        if (!SetEvent(swapchain->frame_latency_event))
+        if (!ReleaseSemaphore(swapchain->frame_latency_semaphore, 1, NULL))
         {
-            ERR("Failed to set frame latency event, last error %ld.\n", GetLastError());
+            ERR("Failed to release frame latency semaphore, last error %ld.\n", GetLastError());
             return HRESULT_FROM_WIN32(GetLastError());
         }
     }
@@ -2865,9 +2865,9 @@ static HRESULT STDMETHODCALLTYPE d3d12_swapchain_SetMaximumFrameLatency(IDXGISwa

if (max_latency > swapchain->frame_latency)
     {
-        if (!SetEvent(swapchain->frame_latency_event))
+        if (!ReleaseSemaphore(swapchain->frame_latency_semaphore, max_latency - swapchain->frame_latency, NULL))
         {
-            ERR("Failed to set event, last error %lu.\n", GetLastError());
+            ERR("Failed to release frame latency semaphore, last error %lu.\n", GetLastError());
             return HRESULT_FROM_WIN32(GetLastError());
         }
     }
@@ -2900,10 +2900,10 @@ static HANDLE STDMETHODCALLTYPE d3d12_swapchain_GetFrameLatencyWaitableObject(ID

TRACE("iface %p.\n", iface);

-    if (!swapchain->frame_latency_event)
+    if (!swapchain->frame_latency_semaphore)
         return NULL;

-    ret = DuplicateHandle(GetCurrentProcess(), swapchain->frame_latency_event, GetCurrentProcess(),
+    ret = DuplicateHandle(GetCurrentProcess(), swapchain->frame_latency_semaphore, GetCurrentProcess(),
             &dup, 0, FALSE, DUPLICATE_SAME_ACCESS);

if (!ret)
@@ -3344,10 +3344,10 @@ static HRESULT d3d12_swapchain_init(struct d3d12_swapchain *swapchain, IWineDXGI
     {
         swapchain->frame_latency = 1;

-        if (!(swapchain->frame_latency_event = CreateEventW(NULL, FALSE, TRUE, NULL)))
+        if (!(swapchain->frame_latency_semaphore = CreateSemaphoreW(NULL, swapchain->frame_latency, LONG_MAX, NULL)))
         {
             hr = HRESULT_FROM_WIN32(GetLastError());
-            WARN("Failed to create frame latency event, hr %#lx.\n", hr);
+            WARN("Failed to create frame latency semaphore, hr %#lx.\n", hr);
             d3d12_swapchain_destroy(swapchain);
             return hr;
         }
diff --git a/dlls/dxgi/tests/dxgi.c b/dlls/dxgi/tests/dxgi.c
index b8cf3597483..a5a76a6158a 100644
--- a/dlls/dxgi/tests/dxgi.c
+++ b/dlls/dxgi/tests/dxgi.c
@@ -7145,7 +7145,7 @@ static void test_frame_latency_event(IUnknown *device, BOOL is_d3d12)
     wait_result = WaitForSingleObject(semaphore, 0);
     ok(!wait_result, "Got unexpected wait result %#lx.\n", wait_result);
     wait_result = WaitForSingleObject(semaphore, 0);
-    todo_wine ok(!wait_result, "Got unexpected wait result %#lx.\n", wait_result);
+    ok(!wait_result, "Got unexpected wait result %#lx.\n", wait_result);
     wait_result = WaitForSingleObject(semaphore, 100);
     ok(wait_result == WAIT_TIMEOUT, "Got unexpected wait result %#lx.\n", wait_result);

@@ -7184,7 +7184,6 @@ static void test_frame_latency_event(IUnknown *device, BOOL is_d3d12)
     for (i = 0; i < 5; i++)
     {
         wait_result = WaitForSingleObject(semaphore, 100);
-        todo_wine_if(i != 0)
         ok(!wait_result, "Got unexpected wait result %#lx.\n", wait_result);
     }

@@ -7236,7 +7235,6 @@ static void test_frame_latency_event(IUnknown *device, BOOL is_d3d12)
         for (i = 0; i < 4; i++)
         {
             wait_result = WaitForSingleObject(semaphore, 100);
-            todo_wine_if(i != 0)
             ok(!wait_result, "Got unexpected wait result %#lx.\n", wait_result);
         }