kc3-lang/angle/src/libANGLE/Thread.h

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• Hash : b9fd47b8
  Author :
  Date : 2022-08-12T10:55:49
  

  Not use Android TLS slot for chromium
  
  In the profile, GetGlobalContext() & GetValidGlobalContext() have
  extra overhead for checking angle::gUseAndroidOpenGLTlsSlot.
  Since angle::gUseAndroidOpenGLTlsSlot is always false for now,
  so add a build flag to disable it for chromium build.
  
  In the profile, with angle_use_android_tls_slot = false,
  GetValidGlobalContext() is reduced from 0.153% to 0.044%.
  
  Bug: chromium:1336126
  Change-Id: Id5e1752b0a03289fb299e8de2ed6e962e35291c0
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3827955
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Auto-Submit: Peng Huang <penghuang@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/Thread.h

• //
  // Copyright 2016 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.
  //
  
  // Thread.h : Defines the Thread class which represents a global EGL thread.
  
  #ifndef LIBANGLE_THREAD_H_
  #define LIBANGLE_THREAD_H_
  
  #include <EGL/egl.h>
  
  #include "libANGLE/Debug.h"
  
  #include <atomic>
  
  namespace angle
  {
  #if defined(ANGLE_USE_ANDROID_TLS_SLOT)
  extern bool gUseAndroidOpenGLTlsSlot;
  #endif
  
  void PthreadKeyDestructorCallback(void *ptr);
  }  // namespace angle
  
  namespace gl
  {
  class Context;
  }  // namespace gl
  
  namespace egl
  {
  class Error;
  class Debug;
  class Display;
  class Surface;
  
  class Thread : public LabeledObject
  {
    public:
      Thread();
  
      void setLabel(EGLLabelKHR label) override;
      EGLLabelKHR getLabel() const override;
  
      void setSuccess();
  
      void setError(EGLint error,
                    const char *command,
                    const LabeledObject *object,
                    const char *message);
  
      // TODO: Remove egl::Error. http://anglebug.com/3041
      void setError(const Error &error, const char *command, const LabeledObject *object);
      EGLint getError() const;
  
      void setAPI(EGLenum api);
      EGLenum getAPI() const;
  
      void setCurrent(gl::Context *context);
      Surface *getCurrentDrawSurface() const;
      Surface *getCurrentReadSurface() const;
      gl::Context *getContext() const;
      Display *getDisplay() const;
  
    private:
      EGLLabelKHR mLabel;
      EGLint mError;
      EGLenum mAPI;
      gl::Context *mContext;
  };
  
  void EnsureDebugAllocated();
  void DeallocateDebug();
  Debug *GetDebug();
  
  }  // namespace egl
  
  #endif  // LIBANGLE_THREAD_H_
  

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