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#pragma once
#include <Disks/IDisk.h>
namespace DB
{
class IDisk;
using DiskPtr = std::shared_ptr<IDisk>;
/// Helper class, that receives file descriptor and does fsync for it in destructor.
/// It's used to keep descriptor open, while doing some operations with it, and do fsync at the end.
/// Guaranties of sequence 'close-reopen-fsync' may depend on kernel version.
/// Source: linux-fsdevel mailing-list https://marc.info/?l=linux-fsdevel&m=152535409207496
class LocalDirectorySyncGuard final : public ISyncGuard
{
public:
/// NOTE: If you have already opened descriptor, it's preferred to use
/// this constructor instead of constructor with path.
explicit LocalDirectorySyncGuard(int fd_) : fd(fd_) {}
explicit LocalDirectorySyncGuard(const String & full_path);
~LocalDirectorySyncGuard() override;
private:
int fd = -1;
};
}
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