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/* libhw/generic/io.h - Device-independent I/O definitions
*
* Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#ifndef _LIBHW_GENERIC_IO_H_
#define _LIBHW_GENERIC_IO_H_
#include <stddef.h> /* for size_t */
#include <libobj/obj.h>
/* structs ********************************************************************/
#if __unix__
#include <sys/uio.h>
#else
struct iovec {
void *iov_base;
size_t iov_len;
};
#endif
struct duplex_iovec {
void *iov_read_dst;
void *iov_write_src;
size_t iov_len;
};
/* basic interfaces ***********************************************************/
/**
* Return 0 on success, -errno on error.
*/
#define io_closer_LO_IFACE \
LO_FUNC(int, close)
LO_INTERFACE(io_closer)
#define io_close(c) LO_CALL(c, close)
/**
* All methods return 0 on success, -errno on error.
*/
#define io_bidi_closer_LO_IFACE \
LO_NEST(io_closer) \
LO_FUNC(int, close_read) \
LO_FUNC(int, close_write)
LO_INTERFACE(io_bidi_closer)
#define io_close_read(c) LO_CALL(c, close_read)
#define io_close_write(c) LO_CALL(c, close_write)
#endif /* _LIBHW_GENERIC_IO_H_ */
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