select_event_handler.h

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// Copyright (C) 2025 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#ifndef SELECT_EVENT_HANDLER_H
#define SELECT_EVENT_HANDLER_H
 
#include <util/fd_event_handler.h>
 
#include <sys/select.h>
 
namespace isc {
namespace util {

class SelectEventHandler : public FDEventHandler {
public:
    SelectEventHandler();

    virtual ~SelectEventHandler() = default;

    void add(int fd);

    int waitEvent(uint32_t timeout_sec, uint32_t timeout_usec = 0,
                  bool use_timeout = true);

    bool readReady(int fd);

    virtual bool hasError(int fd);

    void clear();
 
private:
    int max_fd_;

    fd_set read_fd_set_;

    fd_set read_fd_set_data_;
};
 
}  // namespace isc::util;
}  // namespace isc
 
#endif  // SELECT_EVENT_HANDLER_H