qemu

FORK: QEMU emulator
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channel-null.h (1437B)

      1 /*
      2  * QEMU I/O channels null driver
      3  *
      4  * Copyright (c) 2022 Red Hat, Inc.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Lesser General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2.1 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Lesser General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Lesser General Public
     17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18  *
     19  */
     20 
     21 #ifndef QIO_CHANNEL_FILE_H
     22 #define QIO_CHANNEL_FILE_H
     23 
     24 #include "io/channel.h"
     25 #include "qom/object.h"
     26 
     27 #define TYPE_QIO_CHANNEL_NULL "qio-channel-null"
     28 OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelNull, QIO_CHANNEL_NULL)
     29 
     30 
     31 /**
     32  * QIOChannelNull:
     33  *
     34  * The QIOChannelNull object provides a channel implementation
     35  * that discards all writes and returns EOF for all reads.
     36  */
     37 
     38 struct QIOChannelNull {
     39     QIOChannel parent;
     40     bool closed;
     41 };
     42 
     43 
     44 /**
     45  * qio_channel_null_new:
     46  *
     47  * Create a new IO channel object that discards all writes
     48  * and returns EOF for all reads.
     49  *
     50  * Returns: the new channel object
     51  */
     52 QIOChannelNull *
     53 qio_channel_null_new(void);
     54 
     55 #endif /* QIO_CHANNEL_NULL_H */