runtime/runtime_options.h

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ART_RUNTIME_RUNTIME_OPTIONS_H_
#define ART_RUNTIME_RUNTIME_OPTIONS_H_

#include <cstdarg>
#include <cstdio>
#include <string>
#include <vector>

#include "arch/instruction_set.h"
#include "base/variant_map.h"
#include "cmdline_types.h"  // TODO: don't need to include this file here
#include "gc/collector_type.h"
#include "gc/space/large_object_space.h"
#include "hidden_api.h"
#include "jit/jit.h"
#include "jit/jit_code_cache.h"
#include "jit/profile_saver_options.h"
#include "verifier/verifier_enums.h"

namespace art {

class CompilerCallbacks;
class DexFile;
struct XGcOption;
struct BackgroundGcOption;

#define DECLARE_KEY(Type, Name) static const Key<Type> Name

// Define a key that is usable with a RuntimeArgumentMap.
// This key will *not* work with other subtypes of VariantMap.
template <typename TValue>
struct RuntimeArgumentMapKey : VariantMapKey<TValue> {
  RuntimeArgumentMapKey() {}
  explicit RuntimeArgumentMapKey(TValue default_value)
    : VariantMapKey<TValue>(std::move(default_value)) {}
  // Don't ODR-use constexpr default values, which means that Struct::Fields
  // that are declared 'static constexpr T Name = Value' don't need to have a matching definition.
};

// Defines a type-safe heterogeneous key->value map.
// Use the VariantMap interface to look up or to store a RuntimeArgumentMapKey,Value pair.
//
// Example:
//    auto map = RuntimeArgumentMap();
//    map.Set(RuntimeArgumentMap::HeapTargetUtilization, 5.0);
//    double *target_utilization = map.Get(RuntimeArgumentMap);
//
struct RuntimeArgumentMap : VariantMap<RuntimeArgumentMap, RuntimeArgumentMapKey> {
  // This 'using' line is necessary to inherit the variadic constructor.
  using VariantMap<RuntimeArgumentMap, RuntimeArgumentMapKey>::VariantMap;

  // Make the next many usages of Key slightly shorter to type.
  template <typename TValue>
  using Key = RuntimeArgumentMapKey<TValue>;

  // List of key declarations, shorthand for 'static const Key<T> Name'
#define RUNTIME_OPTIONS_KEY(Type, Name, ...) static const Key<Type> (Name);
#include "runtime_options.def"
};

#undef DECLARE_KEY

  // using RuntimeOptions = RuntimeArgumentMap;
}  // namespace art

#endif  // ART_RUNTIME_RUNTIME_OPTIONS_H_