kc3-lang/angle/src/libANGLE/renderer/gl/egl/FunctionsEGLDL.cpp

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• Hash : cfb430c8
  Author :
  Date : 2025-02-10T13:19:05
  

  Remove angle::ErrorStream helper
  
  Most uses of the helper either use just the code or a fixed string,
  which compiles to a few instructions. Using this helper adds 200+ bytes
  of assembly to each use, due to the unneeded instantiation of
  ostringstream which allocates a buffer etc. The combined effect of this
  CL on an Android perf build is ~12KB (0.2%) reduction in size.
  
  The cases where the message is actually formatted are converted to an
  explicit use of ostringstream. Removing the helper so that the new code
  is explicit about the intent to use ostringstream, or an alternative way
  to format the message.
  
  Discovered accidentally while looking into size reduction due to
  __builtin_unreachable()
  
  Semi-automated code change, risk of copy-paste mistakes should be
  minimal.
  
  Bug: angleproject:394129077
  Change-Id: I47c2642d750d31416b08a1cfa435d5463c294e35
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6250078
  Commit-Queue: Roman Lavrov <romanl@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Charlie Lao <cclao@google.com>
  

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• src/libANGLE/renderer/gl/egl/FunctionsEGLDL.cpp

• //
  // 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.
  //
  
  // FunctionsEGLDL.cpp: Implements the FunctionsEGLDL class.
  
  #include "libANGLE/renderer/gl/egl/FunctionsEGLDL.h"
  
  #include <dlfcn.h>
  
  namespace rx
  {
  namespace
  {
  // In ideal world, we would want this to be a member of FunctionsEGLDL,
  // and call dlclose() on it in ~FunctionsEGLDL().
  // However, some GL implementations are broken and don't allow multiple
  // load/unload cycles, but only static linking with them.
  // That's why we dlopen() this handle once and never dlclose() it.
  // This is consistent with Chromium's CleanupNativeLibraries() code,
  // referencing crbug.com/250813 and http://www.xfree86.org/4.3.0/DRI11.html
  void *nativeEGLHandle;
  }  // anonymous namespace
  
  FunctionsEGLDL::FunctionsEGLDL() : mGetProcAddressPtr(nullptr) {}
  
  FunctionsEGLDL::~FunctionsEGLDL() {}
  
  egl::Error FunctionsEGLDL::initialize(EGLAttrib platformType,
                                        EGLNativeDisplayType nativeDisplay,
                                        const char *libName,
                                        void *eglHandle)
  {
  
      if (eglHandle)
      {
          // If the handle is provided, use it.
          // Caller has already dlopened the vendor library.
          nativeEGLHandle = eglHandle;
      }
  
      if (!nativeEGLHandle)
      {
          nativeEGLHandle = dlopen(libName, RTLD_NOW);
          if (!nativeEGLHandle)
          {
              std::ostringstream err;
              err << "Could not dlopen native EGL: " << dlerror();
              return egl::Error(EGL_NOT_INITIALIZED, err.str());
          }
      }
  
      mGetProcAddressPtr =
          reinterpret_cast<PFNEGLGETPROCADDRESSPROC>(dlsym(nativeEGLHandle, "eglGetProcAddress"));
      if (!mGetProcAddressPtr)
      {
          return egl::Error(EGL_NOT_INITIALIZED, "Could not find eglGetProcAddress");
      }
  
      return FunctionsEGL::initialize(platformType, nativeDisplay);
  }
  
  void *FunctionsEGLDL::getProcAddress(const char *name) const
  {
      void *f = reinterpret_cast<void *>(mGetProcAddressPtr(name));
      if (f)
      {
          return f;
      }
      return dlsym(nativeEGLHandle, name);
  }
  
  }  // namespace rx
  

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