chromium/third_party/perfetto/src/base/scoped_mmap.cc

/*
 * Copyright (C) 2024 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.
 */

#include "perfetto/ext/base/scoped_mmap.h"

#include <utility>

#include "perfetto/ext/base/file_utils.h"
#include "perfetto/ext/base/scoped_file.h"

#if PERFETTO_BUILDFLAG(PERFETTO_OS_LINUX) ||   \
    PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID) || \
    PERFETTO_BUILDFLAG(PERFETTO_OS_APPLE)
#include <sys/mman.h>
#include <unistd.h>
#elif PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
#include <Windows.h>
#endif

namespace perfetto::base {
namespace {

ScopedPlatformHandle OpenFileForMmap(const char* fname) { … }

}  // namespace

ScopedMmap::ScopedMmap(ScopedMmap&& other) noexcept { … }

ScopedMmap& ScopedMmap::operator=(ScopedMmap&& other) noexcept { … }

ScopedMmap::~ScopedMmap() { … }

// static
ScopedMmap ScopedMmap::FromHandle(base::ScopedPlatformHandle file,
                                  size_t length) { … }

bool ScopedMmap::reset() noexcept { … }

#if PERFETTO_BUILDFLAG(PERFETTO_OS_LINUX) ||   \
    PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID) || \
    PERFETTO_BUILDFLAG(PERFETTO_OS_APPLE)
// static
ScopedMmap ScopedMmap::InheritMmappedRange(void* data, size_t size) { … }
#endif

ScopedMmap ReadMmapFilePart(const char* fname, size_t length) { … }

ScopedMmap ReadMmapWholeFile(const char* fname) { … }

}  // namespace perfetto::base