zircon/system/public/zircon/device/ioctl-wrapper.h

// Copyright 2016 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SYSROOT_ZIRCON_DEVICE_IOCTL_WRAPPER_H_
#define SYSROOT_ZIRCON_DEVICE_IOCTL_WRAPPER_H_

#include <stddef.h>
#include <stdio.h>
#include <sys/types.h>
#include <zircon/compiler.h>

__BEGIN_CDECLS

extern ssize_t fdio_ioctl(int fd, int op, const void* in_buf, size_t in_len, void* out_buf, size_t out_len);

#define IOCTL_WRAPPER(name, op)                      \
    static inline ssize_t name(int fd) {             \
        return fdio_ioctl(fd, op, NULL, 0, NULL, 0); \
    }

#define IOCTL_WRAPPER_IN(name, op, type)                              \
    static inline ssize_t name(int fd, const type* in) {              \
        return fdio_ioctl(fd, op, in, in ? sizeof(*in) : 0, NULL, 0); \
    }

#define IOCTL_WRAPPER_VARIN(name, op, type)                             \
    static inline ssize_t name(int fd, const type* in, size_t in_len) { \
        return fdio_ioctl(fd, op, in, in_len, NULL, 0);                 \
    }

#define IOCTL_WRAPPER_OUT(name, op, type)                                \
    static inline ssize_t name(int fd, type* out) {                      \
        return fdio_ioctl(fd, op, NULL, 0, out, out ? sizeof(*out) : 0); \
    }

#define IOCTL_WRAPPER_VAROUT(name, op, type)                        \
    static inline ssize_t name(int fd, type* out, size_t out_len) { \
        return fdio_ioctl(fd, op, NULL, 0, out, out_len);           \
    }

#define IOCTL_WRAPPER_INOUT(name, op, intype, outtype)                                    \
    static inline ssize_t name(int fd, const intype* in, outtype* out) {                  \
        return fdio_ioctl(fd, op, in, in ? sizeof(*in) : 0, out, out ? sizeof(*out) : 0); \
    }

#define IOCTL_WRAPPER_VARIN_OUT(name, op, intype, outtype)                              \
    static inline ssize_t name(int fd, const intype* in, size_t in_len, outtype* out) { \
        return fdio_ioctl(fd, op, in, in_len, out, out ? sizeof(*out) : 0);             \
    }

#define IOCTL_WRAPPER_IN_VAROUT(name, op, intype, outtype)                               \
    static inline ssize_t name(int fd, const intype* in, outtype* out, size_t out_len) { \
        return fdio_ioctl(fd, op, in, in ? sizeof(*in) : 0, out, out_len);               \
    }

#define IOCTL_WRAPPER_VARIN_VAROUT(name, op, intype, outtype)                                           \
    static inline ssize_t name(int fd, const intype* in, size_t in_len, outtype* out, size_t out_len) { \
        return fdio_ioctl(fd, op, in, in_len, out, out_len);                                            \
    }

__END_CDECLS

#endif  // SYSROOT_ZIRCON_DEVICE_IOCTL_WRAPPER_H_