chromium/third_party/perfetto/src/tracing/ipc/posix_shared_memory.cc

/*
 * Copyright (C) 2017 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 "src/tracing/ipc/posix_shared_memory.h"

#if PERFETTO_BUILDFLAG(PERFETTO_OS_LINUX) ||   \
    PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID) || \
    PERFETTO_BUILDFLAG(PERFETTO_OS_APPLE) ||   \
    PERFETTO_BUILDFLAG(PERFETTO_OS_FUCHSIA) || \
    PERFETTO_BUILDFLAG(PERFETTO_OS_WASM)

#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>

#include <memory>
#include <utility>

#include "perfetto/base/compiler.h"
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/temp_file.h"
#include "src/tracing/ipc/memfd.h"

namespace perfetto {

namespace {
int kFileSeals = …;
}  // namespace

// static
std::unique_ptr<PosixSharedMemory> PosixSharedMemory::Create(size_t size) { … }

// static
std::unique_ptr<PosixSharedMemory> PosixSharedMemory::AttachToFd(
    base::ScopedFile fd,
    bool require_seals_if_supported) { … }

// static
std::unique_ptr<PosixSharedMemory> PosixSharedMemory::MapFD(base::ScopedFile fd,
                                                            size_t size) { … }

PosixSharedMemory::PosixSharedMemory(void* start,
                                     size_t size,
                                     base::ScopedFile fd)
    : … { … }

PosixSharedMemory::~PosixSharedMemory() { … }

PosixSharedMemory::Factory::~Factory() { … }

std::unique_ptr<SharedMemory> PosixSharedMemory::Factory::CreateSharedMemory(
    size_t size) { … }

}  // namespace perfetto

#endif  // OS_LINUX || OS_ANDROID || OS_APPLE