FileLocker.h

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// Copyright 2024 libsese
//
// 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 <sese/Config.h>
 
namespace sese::system {
 
class  FileLocker {
public:
    explicit FileLocker(int32_t fd) : fd(fd) {}
 
    [[nodiscard]] bool lockWrite(int64_t start, int64_t len);
 
    [[nodiscard]] bool lockRead(int64_t start, int64_t len);
 
    [[nodiscard]] bool lock(int64_t start, int64_t len);
 
    [[nodiscard]] bool unlock();
 
private:
    int32_t fd{};
#ifdef SESE_PLATFORM_WINDOWS
    int64_t offset{};
    int64_t size{};
#endif
};
 
} // namespace sese::system