kc3-lang/angle/src/libANGLE/renderer/d3d/d3d9/ShaderCache.h

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• Hash : c3a1cae4
  Author :
  Date : 2024-04-15T14:58:55
  

  Use angle::SimpleMutex everywhere in libGLESv2
  
  Only cases left that use std::mutex are:
  
  - Share group and the context ErrorSet mutexes as they need try_lock()
  - Anywhere mutexes are used in conjunction with std::condition_variables
    (as they explicitly require std::mutex)
  
  Bug: angleproject:8667
  Change-Id: Ib6d68938b0886f9e7c43e023162557990ecfb300
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5453294
  Reviewed-by: Roman Lavrov <romanl@google.com>
  Reviewed-by: Charlie Lao <cclao@google.com>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d9/ShaderCache.h

• //
  // Copyright 2012 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.
  //
  
  // ShaderCache: Defines rx::ShaderCache, a cache of Direct3D shader objects
  // keyed by their byte code.
  
  #ifndef LIBANGLE_RENDERER_D3D_D3D9_SHADERCACHE_H_
  #define LIBANGLE_RENDERER_D3D_D3D9_SHADERCACHE_H_
  
  #include "libANGLE/Error.h"
  
  #include "common/SimpleMutex.h"
  #include "common/debug.h"
  #include "libANGLE/renderer/d3d/d3d9/Context9.h"
  
  #include <cstddef>
  #include <mutex>
  #include <string>
  #include <unordered_map>
  
  namespace rx
  {
  template <typename ShaderObject>
  class ShaderCache : angle::NonCopyable
  {
    public:
      ShaderCache() : mDevice(nullptr) {}
  
      ~ShaderCache()
      {
          // Call clear while the device is still valid.
          ASSERT(mMap.empty());
      }
  
      void initialize(IDirect3DDevice9 *device) { mDevice = device; }
  
      angle::Result create(d3d::Context *context,
                           const DWORD *function,
                           size_t length,
                           ShaderObject **outShaderObject)
      {
          std::lock_guard<angle::SimpleMutex> lock(mMutex);
  
          std::string key(reinterpret_cast<const char *>(function), length);
          typename Map::iterator it = mMap.find(key);
          if (it != mMap.end())
          {
              it->second->AddRef();
              *outShaderObject = it->second;
              return angle::Result::Continue;
          }
  
          ShaderObject *shader;
          HRESULT result = createShader(function, &shader);
          ANGLE_TRY_HR(context, result, "Failed to create shader");
  
          // Random eviction policy.
          if (mMap.size() >= kMaxMapSize)
          {
              SafeRelease(mMap.begin()->second);
              mMap.erase(mMap.begin());
          }
  
          shader->AddRef();
          mMap[key] = shader;
  
          *outShaderObject = shader;
          return angle::Result::Continue;
      }
  
      void clear()
      {
          std::lock_guard<angle::SimpleMutex> lock(mMutex);
  
          for (typename Map::iterator it = mMap.begin(); it != mMap.end(); ++it)
          {
              SafeRelease(it->second);
          }
  
          mMap.clear();
      }
  
    private:
      const static size_t kMaxMapSize = 100;
  
      HRESULT createShader(const DWORD *function, IDirect3DVertexShader9 **shader)
      {
          return mDevice->CreateVertexShader(function, shader);
      }
  
      HRESULT createShader(const DWORD *function, IDirect3DPixelShader9 **shader)
      {
          return mDevice->CreatePixelShader(function, shader);
      }
  
      typedef angle::HashMap<std::string, ShaderObject *> Map;
      Map mMap;
      angle::SimpleMutex mMutex;
  
      IDirect3DDevice9 *mDevice;
  };
  
  typedef ShaderCache<IDirect3DVertexShader9> VertexShaderCache;
  typedef ShaderCache<IDirect3DPixelShader9> PixelShaderCache;
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_D3D_D3D9_SHADERCACHE_H_
  

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