proc_table.cc

Go to the documentation of this file.

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "flutter/impeller/toolkit/android/proc_table.h"
 
#include "flutter/fml/build_config.h"
#include "impeller/base/validation.h"
 
namespace impeller::android {
 
const ProcTable& GetProcTable() {
  static ProcTable gProcTable;
  return gProcTable;
}
 
// Only used by tests.
ProcTable& GetMutableProcTable() {
  return const_cast<ProcTable&>(GetProcTable());
}
 
template <class T>
void ResolveAndroidProc(
    AndroidProc<T>& proc,
    const std::vector<fml::RefPtr<fml::NativeLibrary>>& libs) {
  for (const auto& lib : libs) {
    proc.proc = lib->ResolveFunction<T*>(proc.proc_name).value_or(nullptr);
    if (proc.proc) {
      break;
    }
  }
}
 
ProcTable::ProcTable() {
  auto lib_android = fml::NativeLibrary::Create("libandroid.so");
  auto lib_egl = fml::NativeLibrary::Create("libEGL.so");
 
  if (!lib_android || !lib_egl) {
    VALIDATION_LOG << "Could not open Android libraries.";
    return;
  }
 
  libraries_.push_back(std::move(lib_android));
  libraries_.push_back(std::move(lib_egl));
 
#define RESOLVE_PROC(proc, api) ResolveAndroidProc(proc, libraries_);
  FOR_EACH_ANDROID_PROC(RESOLVE_PROC);
#undef RESOLVE_PROC
 
  if (AChoreographer_postFrameCallback64) {
    AChoreographer_postFrameCallback.Reset();
  }
 
#if FML_ARCH_CPU_32_BITS
  // On 32-bit platforms, the nanosecond resolution timestamp causes overflow on
  // the argument in the callback. Don't use it on those platforms.
  AChoreographer_postFrameCallback.Reset();
#endif  // FML_ARCH_CPU_32_BITS
 
  is_valid_ = true;
}
 
ProcTable::~ProcTable() = default;
 
bool ProcTable::IsValid() const {
  return is_valid_;
}
 
bool ProcTable::TraceIsEnabled() const {
  return this->ATrace_isEnabled ? this->ATrace_isEnabled() : false;
}
 
}  // namespace impeller::android