Revert "Fix ResourceManager create-on-bind reallocations."

src/libANGLE/HandleAllocator.cpp

@@ -9,29 +9,13 @@
 
 #include "libANGLE/HandleAllocator.h"
 
-#include <algorithm>
-
 #include "common/debug.h"
 
 namespace gl
 {
 
-struct HandleAllocator::HandleRangeComparator
-{
-    bool operator()(const HandleRange &range, GLuint handle) const
-    {
-        return (handle < range.begin);
-    }
-};
-
 HandleAllocator::HandleAllocator() : mBaseValue(1), mNextValue(1)
 {
-    mUnallocatedList.push_back(HandleRange(1, std::numeric_limits<GLuint>::max() - 1));
-}
-
-HandleAllocator::HandleAllocator(GLuint maximumHandleValue) : mBaseValue(1), mNextValue(1)
-{
-    mUnallocatedList.push_back(HandleRange(1, maximumHandleValue));
 }
 
 HandleAllocator::~HandleAllocator()
@@ -47,86 +31,32 @@ void HandleAllocator::setBaseHandle(GLuint value)
 
 GLuint HandleAllocator::allocate()
 {
-    ASSERT(!mUnallocatedList.empty() || !mReleasedList.empty());
-
-    // Allocate from released list, constant time.
-    if (!mReleasedList.empty())
-    {
-        GLuint reusedHandle = mReleasedList.back();
-        mReleasedList.pop_back();
-        return reusedHandle;
-    }
-
-    // Allocate from unallocated list, constant time.
-    auto listIt = mUnallocatedList.begin();
-
-    GLuint freeListHandle = listIt->begin;
-    ASSERT(freeListHandle > 0);
-
-    listIt->begin++;
-    if (listIt->begin == listIt->end)
+    if (mFreeValues.size())
     {
-        mUnallocatedList.erase(listIt);
+        GLuint handle = mFreeValues.back();
+        mFreeValues.pop_back();
+        return handle;
     }
-
-    return freeListHandle;
+    return mNextValue++;
 }
 
 void HandleAllocator::release(GLuint handle)
 {
-    // Add to released list, constant time.
-    mReleasedList.push_back(handle);
-}
-
-void HandleAllocator::reserve(GLuint handle)
-{
-    // Clear from released list -- might be a slow operation.
-    if (!mReleasedList.empty())
-    {
-        auto releasedIt = std::find(mReleasedList.begin(), mReleasedList.end(), handle);
-        if (releasedIt != mReleasedList.end())
-        {
-            mReleasedList.erase(releasedIt);
-            return;
-        }
-    }
-
-    // Not in released list, reserve in the unallocated list.
-    auto boundIt = std::lower_bound(mUnallocatedList.begin(), mUnallocatedList.end(), handle, HandleRangeComparator());
-
-    ASSERT(boundIt != mUnallocatedList.end());
-
-    GLuint begin = boundIt->begin;
-    GLuint end = boundIt->end;
-
-    if (handle == begin || handle == end)
+    if (handle == mNextValue - 1)
     {
-        if (begin + 1 == end)
+        // Don't drop below base value
+        if(mNextValue > mBaseValue)
         {
-            mUnallocatedList.erase(boundIt);
+            mNextValue--;
         }
-        else if (handle == begin)
-        {
-            boundIt->begin++;
     }
     else
     {
-            ASSERT(handle == end);
-            boundIt->end--;
-        }
-        return;
-    }
-
-    // need to split the range
-    auto placementIt = mUnallocatedList.erase(boundIt);
-
-    if (begin != handle)
+        // Only free handles that we own - don't drop below the base value
+        if (handle >= mBaseValue)
         {
-        placementIt = mUnallocatedList.insert(placementIt, HandleRange(begin, handle));
+            mFreeValues.push_back(handle);
         }
-    if (handle + 1 != end)
-    {
-        mUnallocatedList.insert(placementIt, HandleRange(handle + 1, end));
     }
 }
 

src/libANGLE/HandleAllocator.h

@@ -14,26 +14,21 @@
 
 #include "angle_gl.h"
 
-#include <stack>
+#include <vector>
 
 namespace gl
 {
 
-class HandleAllocator final
+class HandleAllocator
 {
   public:
-    // Maximum handle = MAX_UINT-1
     HandleAllocator();
-    // Specify maximum handle value
-    HandleAllocator(GLuint maximumHandleValue);
-
-    ~HandleAllocator();
+    virtual ~HandleAllocator();
 
     void setBaseHandle(GLuint value);
 
     GLuint allocate();
     void release(GLuint handle);
-    void reserve(GLuint handle);
 
   private:
     DISALLOW_COPY_AND_ASSIGN(HandleAllocator);
@@ -42,22 +37,6 @@ class HandleAllocator final
     GLuint mNextValue;
     typedef std::vector<GLuint> HandleList;
     HandleList mFreeValues;
-
-    struct HandleRange
-    {
-        HandleRange(GLuint beginIn, GLuint endIn) : begin(beginIn), end(endIn) {}
-
-        GLuint begin;
-        GLuint end;
-    };
-
-    struct HandleRangeComparator;
-
-    // The freelist consists of never-allocated handles, stored
-    // as ranges, and handles that were previously allocated and
-    // released, stored in a stack.
-    std::vector<HandleRange> mUnallocatedList;
-    std::vector<GLuint> mReleasedList;
 };
 
 }

src/libANGLE/HandleAllocator_unittest.cpp

-//
-// Copyright 2015 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.
-//
-// Unit tests for HandleAllocator.
-//
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-#include "libANGLE/HandleAllocator.h"
-
-namespace
-{
-
-TEST(HandleAllocatorTest, ReservationsWithGaps)
-{
-    gl::HandleAllocator allocator;
-
-    std::set<GLuint> allocationList;
-    for (GLuint id = 2; id < 50; id += 2)
-    {
-        allocationList.insert(id);
-    }
-
-    for (GLuint id : allocationList)
-    {
-        allocator.reserve(id);
-    }
-
-    std::set<GLuint> allocatedList;
-    for (size_t allocationNum = 0; allocationNum < allocationList.size() * 2; ++allocationNum)
-    {
-        GLuint handle = allocator.allocate();
-        EXPECT_EQ(0, allocationList.count(handle));
-        EXPECT_EQ(0, allocatedList.count(handle));
-        allocatedList.insert(handle);
-    }
-}
-
-TEST(HandleAllocatorTest, Random)
-{
-    gl::HandleAllocator allocator;
-
-    std::set<GLuint> allocationList;
-    for (size_t iterationCount = 0; iterationCount < 40; ++iterationCount)
-    {
-        for (size_t randomCount = 0; randomCount < 40; ++randomCount)
-        {
-            GLuint randomHandle = (rand() % 1000) + 1;
-            if (allocationList.count(randomHandle) == 0)
-            {
-                allocator.reserve(randomHandle);
-                allocationList.insert(randomHandle);
-            }
-        }
-
-        for (size_t normalCount = 0; normalCount < 40; ++normalCount)
-        {
-            GLuint normalHandle = allocator.allocate();
-            EXPECT_EQ(0, allocationList.count(normalHandle));
-            allocationList.insert(normalHandle);
-        }
-    }
-}
-
-TEST(HandleAllocatorTest, Reallocation)
-{
-    // Note: no current test for overflow
-    gl::HandleAllocator limitedAllocator(10);
-
-    for (GLuint count = 1; count < 10; count++)
-    {
-        GLuint result = limitedAllocator.allocate();
-        EXPECT_EQ(count, result);
-    }
-
-    for (GLuint count = 1; count < 10; count++)
-    {
-        limitedAllocator.release(count);
-    }
-
-    for (GLuint count = 2; count < 10; count++)
-    {
-        limitedAllocator.reserve(count);
-    }
-
-    GLint finalResult = limitedAllocator.allocate();
-    EXPECT_EQ(finalResult, 1);
-}
-
-}

src/libANGLE/Renderbuffer.cpp

@@ -27,6 +27,7 @@ Renderbuffer::Renderbuffer(rx::RenderbufferImpl *impl, GLuint id)
     mInternalFormat(GL_RGBA4),
     mSamples(0)
 {
+    ASSERT(mRenderbuffer);
 }
 
 Renderbuffer::~Renderbuffer()

src/libANGLE/ResourceManager.cpp

@@ -356,84 +356,33 @@ void ResourceManager::setRenderbuffer(GLuint handle, Renderbuffer *buffer)
     mRenderbufferMap[handle] = buffer;
 }
 
-void ResourceManager::checkBufferAllocation(GLuint handle)
+void ResourceManager::checkBufferAllocation(unsigned int buffer)
 {
-    if (handle != 0)
+    if (buffer != 0 && !getBuffer(buffer))
     {
-        auto bufferMapIt = mBufferMap.find(handle);
-        bool handleAllocated = (bufferMapIt != mBufferMap.end());
-
-        if (handleAllocated && bufferMapIt->second != nullptr)
-        {
-            return;
-        }
-
-        Buffer *buffer = new Buffer(mFactory->createBuffer(), handle);
-        buffer->addRef();
-
-        if (handleAllocated)
-        {
-            bufferMapIt->second = buffer;
-        }
-        else
-        {
-            mBufferHandleAllocator.reserve(handle);
-            mBufferMap[handle] = buffer;
-        }
+        Buffer *bufferObject = new Buffer(mFactory->createBuffer(), buffer);
+        mBufferMap[buffer] = bufferObject;
+        bufferObject->addRef();
     }
 }
 
-void ResourceManager::checkTextureAllocation(GLuint handle, GLenum type)
+void ResourceManager::checkTextureAllocation(GLuint texture, GLenum type)
 {
-    if (handle != 0)
-    {
-        auto textureMapIt = mTextureMap.find(handle);
-        bool handleAllocated = (textureMapIt != mTextureMap.end());
-
-        if (handleAllocated && textureMapIt->second != nullptr)
-        {
-            return;
-        }
-
-        Texture *texture = new Texture(mFactory->createTexture(type), handle, type);
-        texture->addRef();
-
-        if (handleAllocated)
-        {
-            textureMapIt->second = texture;
-        }
-        else
+    if (!getTexture(texture) && texture != 0)
     {
-            mTextureHandleAllocator.reserve(handle);
-            mTextureMap[handle] = texture;
-        }
+        Texture *textureObject = new Texture(mFactory->createTexture(type), texture, type);
+        mTextureMap[texture] = textureObject;
+        textureObject->addRef();
     }
 }
 
-void ResourceManager::checkRenderbufferAllocation(GLuint handle)
+void ResourceManager::checkRenderbufferAllocation(GLuint renderbuffer)
 {
-    if (handle != 0)
-    {
-        auto renderbufferMapIt = mRenderbufferMap.find(handle);
-        bool handleAllocated = (renderbufferMapIt != mRenderbufferMap.end());
-
-        if (handleAllocated && renderbufferMapIt->second != nullptr)
+    if (renderbuffer != 0 && !getRenderbuffer(renderbuffer))
     {
-            return;
-        }
-
-        Renderbuffer *renderbuffer = new Renderbuffer(mFactory->createRenderbuffer(), handle);
-        renderbuffer->addRef();
-
-        if (handleAllocated)
-        {
-            renderbufferMapIt->second = renderbuffer;
-        }
-        else
-        {
-            mRenderbufferHandleAllocator.reserve(handle);
-            mRenderbufferMap[handle] = renderbuffer;
-        }
+        Renderbuffer *renderbufferObject = new Renderbuffer(mFactory->createRenderbuffer(), renderbuffer);
+        mRenderbufferMap[renderbuffer] = renderbufferObject;
+        renderbufferObject->addRef();
     }
 }
 
@@ -444,7 +393,6 @@ void ResourceManager::checkSamplerAllocation(GLuint sampler)
         Sampler *samplerObject = new Sampler(sampler);
         mSamplerMap[sampler] = samplerObject;
         samplerObject->addRef();
-        // Samplers cannot be created via Bind
     }
 }
 

src/libANGLE/ResourceManager.h

@@ -68,9 +68,9 @@ class ResourceManager
 
     void setRenderbuffer(GLuint handle, Renderbuffer *renderbuffer);
 
-    void checkBufferAllocation(GLuint handle);
-    void checkTextureAllocation(GLuint handle, GLenum type);
-    void checkRenderbufferAllocation(GLuint handle);
+    void checkBufferAllocation(unsigned int buffer);
+    void checkTextureAllocation(GLuint texture, GLenum type);
+    void checkRenderbufferAllocation(GLuint renderbuffer);
     void checkSamplerAllocation(GLuint sampler);
 
     bool isSampler(GLuint sampler);
@@ -78,8 +78,6 @@ class ResourceManager
   private:
     DISALLOW_COPY_AND_ASSIGN(ResourceManager);
 
-    void createTextureInternal(GLuint handle);
-
     rx::ImplFactory *mFactory;
     std::size_t mRefCount;
 

src/libANGLE/ResourceManager_unittest.cpp

-//
-// Copyright 2015 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.
-//
-// Unit tests for ResourceManager.
-//
-
-#include <gmock/gmock.h>
-#include <gtest/gtest.h>
-
-#include "angle_unittests_utils.h"
-#include "libANGLE/ResourceManager.h"
-
-using namespace rx;
-using namespace gl;
-
-namespace
-{
-
-class MockFactory : public NullFactory
-{
-  public:
-    MOCK_METHOD0(createBuffer, BufferImpl*());
-    MOCK_METHOD1(createTexture, TextureImpl*(GLenum));
-    MOCK_METHOD0(createRenderbuffer, RenderbufferImpl*());
-};
-
-class ResourceManagerTest : public testing::Test
-{
-  protected:
-    void SetUp() override
-    {
-        mResourceManager = new ResourceManager(&mMockFactory);
-    }
-
-    void TearDown() override
-    {
-        SafeDelete(mResourceManager);
-    }
-
-    MockFactory mMockFactory;
-    ResourceManager *mResourceManager;
-};
-
-TEST_F(ResourceManagerTest, ReallocateBoundTexture)
-{
-    EXPECT_CALL(mMockFactory, createTexture(GL_TEXTURE_2D)).Times(1).RetiresOnSaturation();
-
-    mResourceManager->checkTextureAllocation(1, GL_TEXTURE_2D);
-    GLuint newTexture = mResourceManager->createTexture();
-    EXPECT_NE(1u, newTexture);
-}
-
-TEST_F(ResourceManagerTest, ReallocateBoundBuffer)
-{
-    EXPECT_CALL(mMockFactory, createBuffer()).Times(1).RetiresOnSaturation();
-
-    mResourceManager->checkBufferAllocation(1);
-    GLuint newBuffer = mResourceManager->createBuffer();
-    EXPECT_NE(1u, newBuffer);
-}
-
-TEST_F(ResourceManagerTest, ReallocateBoundRenderbuffer)
-{
-    EXPECT_CALL(mMockFactory, createRenderbuffer()).Times(1).RetiresOnSaturation();
-
-    mResourceManager->checkRenderbufferAllocation(1);
-    GLuint newRenderbuffer = mResourceManager->createRenderbuffer();
-    EXPECT_NE(1u, newRenderbuffer);
-}
-
-}

src/tests/angle_unittests.gypi

@@ -18,12 +18,9 @@
             '<(angle_path)/src/common/Optional_unittest.cpp',
             '<(angle_path)/src/libANGLE/Config_unittest.cpp',
             '<(angle_path)/src/libANGLE/Fence_unittest.cpp',
-            '<(angle_path)/src/libANGLE/HandleAllocator_unittest.cpp',
             '<(angle_path)/src/libANGLE/ImageIndexIterator_unittest.cpp',
-            '<(angle_path)/src/libANGLE/ResourceManager_unittest.cpp',
             '<(angle_path)/src/libANGLE/Surface_unittest.cpp',
             '<(angle_path)/src/libANGLE/TransformFeedback_unittest.cpp',
-            '<(angle_path)/src/tests/angle_unittests_utils.h',
             '<(angle_path)/src/tests/compiler_tests/API_test.cpp',
             '<(angle_path)/src/tests/compiler_tests/CollectVariables_test.cpp',
             '<(angle_path)/src/tests/compiler_tests/ConstantFolding_test.cpp',
@@ -67,7 +64,6 @@
         '<(angle_path)/include',
         '<(angle_path)/src',
         '<(angle_path)/src/compiler/preprocessor',
-        '<(angle_path)/src/tests',
     ],
     'sources':
     [

src/tests/angle_unittests_utils.h

-//
-// Copyright 2015 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.
-//
-// angle_unittests_utils.h:
-//   Helpers for mocking and unit testing.
-
-#ifndef TESTS_ANGLE_UNITTESTS_UTILS_H_
-#define TESTS_ANGLE_UNITTESTS_UTILS_H_
-
-#include "libANGLE/renderer/ImplFactory.h"
-
-namespace rx
-{
-
-// Useful when mocking a part of the ImplFactory class
-class NullFactory : public ImplFactory
-{
-  public:
-    NullFactory() {}
-
-    // Shader creation
-    CompilerImpl *createCompiler(const gl::Data &data) override { return nullptr; }
-    ShaderImpl *createShader(GLenum type) override { return nullptr; }
-    ProgramImpl *createProgram() override { return nullptr; }
-
-    // Framebuffer creation
-    DefaultAttachmentImpl *createDefaultAttachment(GLenum type, egl::Surface *surface) override { return nullptr; }
-    FramebufferImpl *createFramebuffer(const gl::Framebuffer::Data &data) override { return nullptr; }
-
-    // Texture creation
-    TextureImpl *createTexture(GLenum target) override { return nullptr; }
-
-    // Renderbuffer creation
-    RenderbufferImpl *createRenderbuffer() override { return nullptr; }
-
-    // Buffer creation
-    BufferImpl *createBuffer() override { return nullptr; }
-
-    // Vertex Array creation
-    VertexArrayImpl *createVertexArray() override { return nullptr; }
-
-    // Query and Fence creation
-    QueryImpl *createQuery(GLenum type) override { return nullptr; }
-    FenceNVImpl *createFenceNV() override { return nullptr; }
-    FenceSyncImpl *createFenceSync() override { return nullptr; }
-
-    // Transform Feedback creation
-    TransformFeedbackImpl *createTransformFeedback() override { return nullptr; }
-
-    DISALLOW_COPY_AND_ASSIGN(NullFactory);
-};
-
-}
-
-#endif // TESTS_ANGLE_UNITTESTS_UTILS_H_