chromium/third_party/perfetto/include/perfetto/tracing/string_helpers.h

/*
 * Copyright (C) 2021 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 INCLUDE_PERFETTO_TRACING_STRING_HELPERS_H_
#define INCLUDE_PERFETTO_TRACING_STRING_HELPERS_H_

#include "perfetto/base/export.h"
#include "perfetto/base/logging.h"

#include <cstddef>
#include <string>

namespace perfetto {

// A wrapper for marking strings that can't be determined to be static at build
// time, but are in fact static.
class PERFETTO_EXPORT_COMPONENT StaticString { … };

// A explicit wrapper for marking strings as dynamic to ensure that perfetto
// doesn't try to cache the pointer value.
class PERFETTO_EXPORT_COMPONENT DynamicString { … };

namespace internal {

template <size_t N>
constexpr const char* GetStaticString(const char (&string)[N]) { … }

constexpr std::nullptr_t GetStaticString(std::nullptr_t) { … }

constexpr const char* GetStaticString(perfetto::StaticString string) { … }

}  // namespace internal
}  // namespace perfetto

#endif  // INCLUDE_PERFETTO_TRACING_STRING_HELPERS_H_