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#pragma once
#if defined(OS_LINUX)
#include <cstddef>
#include <cstdint>
namespace DB
{
struct EventFD
{
EventFD();
~EventFD();
/// Both read() and write() are blocking.
/// TODO: add non-blocking flag to ctor.
uint64_t read() const;
bool write(uint64_t increase = 1) const;
int fd = -1;
};
}
#else
namespace DB
{
struct EventFD
{
};
}
#endif
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