1 files changed, 237 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/renderer/d3d/d3d11/Fence11.cpp b/gfx/angle/src/libANGLE/renderer/d3d/d3d11/Fence11.cpp
new file mode 100755
index 000000000..1f0eedb6e
--- /dev/null
+++ b/gfx/angle/src/libANGLE/renderer/d3d/d3d11/Fence11.cpp
@@ -0,0 +1,237 @@
+//
+// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Fence11.cpp: Defines the rx::FenceNV11 and rx::FenceSync11 classes which implement
+// rx::FenceNVImpl and rx::FenceSyncImpl.
+
+#include "libANGLE/renderer/d3d/d3d11/Fence11.h"
+#include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
+
+#include "common/utilities.h"
+
+namespace rx
+{
+
+static const int kDeviceLostCheckPeriod = 64;
+
+//
+// Template helpers for set and test operations.
+//
+
+template <class FenceClass>
+gl::Error FenceSetHelper(FenceClass *fence)
+{
+    if (!fence->mQuery)
+    {
+        D3D11_QUERY_DESC queryDesc;
+        queryDesc.Query     = D3D11_QUERY_EVENT;
+        queryDesc.MiscFlags = 0;
+
+        HRESULT result = fence->mRenderer->getDevice()->CreateQuery(&queryDesc, &fence->mQuery);
+        if (FAILED(result))
+        {
+            return gl::Error(GL_OUT_OF_MEMORY, "Failed to create event query, result: 0x%X.",
+                             result);
+        }
+    }
+
+    fence->mRenderer->getDeviceContext()->End(fence->mQuery);
+    return gl::Error(GL_NO_ERROR);
+}
+
+template <class FenceClass>
+gl::Error FenceTestHelper(FenceClass *fence, bool flushCommandBuffer, GLboolean *outFinished)
+{
+    ASSERT(fence->mQuery);
+
+    UINT getDataFlags = (flushCommandBuffer ? 0 : D3D11_ASYNC_GETDATA_DONOTFLUSH);
+    HRESULT result =
+        fence->mRenderer->getDeviceContext()->GetData(fence->mQuery, NULL, 0, getDataFlags);
+
+    if (FAILED(result))
+    {
+        return gl::Error(GL_OUT_OF_MEMORY, "Failed to get query data, result: 0x%X.", result);
+    }
+
+    ASSERT(result == S_OK || result == S_FALSE);
+    *outFinished = ((result == S_OK) ? GL_TRUE : GL_FALSE);
+    return gl::Error(GL_NO_ERROR);
+}
+
+//
+// FenceNV11
+//
+
+FenceNV11::FenceNV11(Renderer11 *renderer) : FenceNVImpl(), mRenderer(renderer), mQuery(NULL)
+{
+}
+
+FenceNV11::~FenceNV11()
+{
+    SafeRelease(mQuery);
+}
+
+gl::Error FenceNV11::set(GLenum condition)
+{
+    return FenceSetHelper(this);
+}
+
+gl::Error FenceNV11::test(GLboolean *outFinished)
+{
+    return FenceTestHelper(this, true, outFinished);
+}
+
+gl::Error FenceNV11::finish()
+{
+    GLboolean finished = GL_FALSE;
+
+    int loopCount = 0;
+    while (finished != GL_TRUE)
+    {
+        loopCount++;
+        ANGLE_TRY(FenceTestHelper(this, true, &finished));
+
+        if (loopCount % kDeviceLostCheckPeriod == 0 && mRenderer->testDeviceLost())
+        {
+            return gl::Error(GL_OUT_OF_MEMORY,
+                             "Device was lost while querying result of an event query.");
+        }
+
+        ScheduleYield();
+    }
+
+    return gl::NoError();
+}
+
+//
+// FenceSync11
+//
+
+// Important note on accurate timers in Windows:
+//
+// QueryPerformanceCounter has a few major issues, including being 10x as expensive to call
+// as timeGetTime on laptops and "jumping" during certain hardware events.
+//
+// See the comments at the top of the Chromium source file "chromium/src/base/time/time_win.cc"
+//   https://code.google.com/p/chromium/codesearch#chromium/src/base/time/time_win.cc
+//
+// We still opt to use QPC. In the present and moving forward, most newer systems will not suffer
+// from buggy implementations.
+
+FenceSync11::FenceSync11(Renderer11 *renderer) : FenceSyncImpl(), mRenderer(renderer), mQuery(NULL)
+{
+    LARGE_INTEGER counterFreqency = {};
+    BOOL success                  = QueryPerformanceFrequency(&counterFreqency);
+    ASSERT(success);
+
+    mCounterFrequency = counterFreqency.QuadPart;
+}
+
+FenceSync11::~FenceSync11()
+{
+    SafeRelease(mQuery);
+}
+
+gl::Error FenceSync11::set(GLenum condition, GLbitfield flags)
+{
+    ASSERT(condition == GL_SYNC_GPU_COMMANDS_COMPLETE && flags == 0);
+    return FenceSetHelper(this);
+}
+
+gl::Error FenceSync11::clientWait(GLbitfield flags, GLuint64 timeout, GLenum *outResult)
+{
+    ASSERT(outResult);
+
+    bool flushCommandBuffer = ((flags & GL_SYNC_FLUSH_COMMANDS_BIT) != 0);
+
+    GLboolean result = GL_FALSE;
+    gl::Error error  = FenceTestHelper(this, flushCommandBuffer, &result);
+    if (error.isError())
+    {
+        *outResult = GL_WAIT_FAILED;
+        return error;
+    }
+
+    if (result == GL_TRUE)
+    {
+        *outResult = GL_ALREADY_SIGNALED;
+        return gl::Error(GL_NO_ERROR);
+    }
+
+    if (timeout == 0)
+    {
+        *outResult = GL_TIMEOUT_EXPIRED;
+        return gl::Error(GL_NO_ERROR);
+    }
+
+    LARGE_INTEGER currentCounter = {};
+    BOOL success                 = QueryPerformanceCounter(&currentCounter);
+    ASSERT(success);
+
+    LONGLONG timeoutInSeconds = static_cast<LONGLONG>(timeout) * static_cast<LONGLONG>(1000000ll);
+    LONGLONG endCounter       = currentCounter.QuadPart + mCounterFrequency * timeoutInSeconds;
+
+    int loopCount = 0;
+    while (currentCounter.QuadPart < endCounter && !result)
+    {
+        loopCount++;
+        ScheduleYield();
+        success = QueryPerformanceCounter(&currentCounter);
+        ASSERT(success);
+
+        error = FenceTestHelper(this, flushCommandBuffer, &result);
+        if (error.isError())
+        {
+            *outResult = GL_WAIT_FAILED;
+            return error;
+        }
+
+        if ((loopCount % kDeviceLostCheckPeriod) == 0 && mRenderer->testDeviceLost())
+        {
+            *outResult = GL_WAIT_FAILED;
+            return gl::Error(GL_OUT_OF_MEMORY,
+                             "Device was lost while querying result of an event query.");
+        }
+    }
+
+    if (currentCounter.QuadPart >= endCounter)
+    {
+        *outResult = GL_TIMEOUT_EXPIRED;
+    }
+    else
+    {
+        *outResult = GL_CONDITION_SATISFIED;
+    }
+
+    return gl::Error(GL_NO_ERROR);
+}
+
+gl::Error FenceSync11::serverWait(GLbitfield flags, GLuint64 timeout)
+{
+    // Because our API is currently designed to be called from a single thread, we don't need to do
+    // extra work for a server-side fence. GPU commands issued after the fence is created will
+    // always be processed after the fence is signaled.
+    return gl::Error(GL_NO_ERROR);
+}
+
+gl::Error FenceSync11::getStatus(GLint *outResult)
+{
+    GLboolean result = GL_FALSE;
+    gl::Error error  = FenceTestHelper(this, false, &result);
+    if (error.isError())
+    {
+        // The spec does not specify any way to report errors during the status test (e.g. device
+        // lost) so we report the fence is unblocked in case of error or signaled.
+        *outResult = GL_SIGNALED;
+
+        return error;
+    }
+
+    *outResult = (result ? GL_SIGNALED : GL_UNSIGNALED);
+    return gl::Error(GL_NO_ERROR);
+}
+
+}  // namespace rx