android_ioctl.h

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#ifndef HALIDE_RUNTIME_ANDROID_IOCTL_H
#define HALIDE_RUNTIME_ANDROID_IOCTL_H
 
#define _IOC_NRBITS 8
#define _IOC_TYPEBITS 8
#define _IOC_SIZEBITS 14
#define _IOC_DIRBITS 2
 
#define _IOC_NRMASK ((1 << _IOC_NRBITS) - 1)
#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS) - 1)
#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS) - 1)
#define _IOC_DIRMASK ((1 << _IOC_DIRBITS) - 1)
 
#define _IOC_NRSHIFT 0
#define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS)
#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS)
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
 
#define _IOC_NONE 0U
#define _IOC_WRITE 1U
#define _IOC_READ 2U
 
#define _IOC(dir, type, nr, size) (((dir) << _IOC_DIRSHIFT) | ((type) << _IOC_TYPESHIFT) | ((nr) << _IOC_NRSHIFT) | ((size) << _IOC_SIZESHIFT))
 
#define _IO(type, nr) _IOC(_IOC_NONE, (type), (nr), 0)
#define _IOR(type, nr, data) _IOC(_IOC_READ, (type), (nr), (sizeof(data)))
#define _IOW(type, nr, data) _IOC(_IOC_WRITE, (type), (nr), (sizeof(data)))
#define _IOWR(type, nr, data) _IOC(_IOC_READ | _IOC_WRITE, (type), (nr), (sizeof(data)))
 
#define _IOR_BAD(type, nr, data) _IOC(_IOC_READ, (type), (nr), sizeof(data))
#define _IOW_BAD(type, nr, data) _IOC(_IOC_WRITE, (type), (nr), sizeof(data))
#define _IOWR_BAD(type, nr, data) _IOC(_IOC_READ | _IOC_WRITE, (type), (nr), sizeof(data))
 
#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
 
#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
#define IOC_INOUT ((_IOC_WRITE | _IOC_READ) << _IOC_DIRSHIFT)
#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
 
#endif