// Copyright 2023 PingCAP, Inc.
//
// 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.

#pragma once

#include <sys/types.h>

#include <cstddef>
#if !_MSC_VER
#include <sys/mman.h>
#endif

#if defined(MREMAP_MAYMOVE)
// we already have implementation (linux)
#else

#define MREMAP_MAYMOVE 1

void * mremap(
    void * old_address,
    size_t old_size,
    size_t new_size,
    int flags = 0,
    int mmap_prot = 0,
    int mmap_flags = 0,
    int mmap_fd = -1,
    off_t mmap_offset = 0);

#endif

inline void * clickhouse_mremap(
    void * old_address,
    size_t old_size,
    size_t new_size,
    int flags = 0,
    [[maybe_unused]] int mmap_prot = 0,
    [[maybe_unused]] int mmap_flags = 0,
    [[maybe_unused]] int mmap_fd = -1,
    [[maybe_unused]] off_t mmap_offset = 0)
{
    return mremap(
        old_address,
        old_size,
        new_size,
        flags
#if !defined(MREMAP_FIXED)
        ,
        mmap_prot,
        mmap_flags,
        mmap_fd,
        mmap_offset
#endif
    );
}