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/**
* D header file for POSIX.
*
* License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
*/
module core.sys.posix.sys.ioccom;
version (Posix):
nothrow @nogc:
version (OSX)
{
/* OSX ioctl's (based on FreeBSD) encode the command in the lower 16-bits
* and the size of any in/out parameters in the lower 13 bits of the upper
* 16-bits of a 32 bit unsigned integer. The high 3 bits of the upper
* 16-bits encode the in/out status of the parameter.
*/
enum uint IOCPARM_MASK = 0x1fff; // parameter length, at most 13 bits
uint IOCPARM_LEN(uint x) // to extract the encoded parameter length
{
return ((x >> 16) & IOCPARM_MASK);
}
uint IOCBASECMD(uint x) // to extract the encoded command
{
return (x & ~(IOCPARM_MASK << 16));
}
uint IOCGROUP(uint x) // to extract the encoded group
{
return ((x >> 8) & 0xff);
}
enum uint IOCPARM_MAX = (IOCPARM_MASK + 1); // max size of ioctl args
enum uint IOC_VOID = 0x20000000; // no parameters
enum uint IOC_OUT = 0x40000000; // copy parameters back
enum uint IOC_IN = 0x80000000; // copy parameters into
enum uint IOC_INOUT = (IOC_IN | IOC_OUT); // copy parameter into and get back
enum uint IOC_DIRMASK = 0xe0000000; // mask to extract above direction parameters
// encode the ioctl info into 32 bits
uint _IOC(T=typeof(null))(uint inorout, uint group, uint num, size_t len)
{
return (inorout | ((len & IOCPARM_MASK) << 16) | (group << 8) | num);
}
// encode a command with no parameters
uint _IO(char g, int n)
{
return _IOC(IOC_VOID, cast(uint)g, cast(uint)n, cast(size_t)0);
}
// encode a command that returns info
uint _IOR(T)(char g, int n)
{
return _IOC!(T)(IOC_OUT, cast(uint)g, cast(uint)n, T.sizeof);
}
// encode a command that takes info
uint _IOW(T)(char g, int n)
{
return _IOC!(T)(IOC_IN, cast(uint)g, cast(uint)n, T.sizeof);
}
// encode a command that takes info and returns info
uint _IOWR(T)(char g, int n)
{
return _IOC!(T)(IOC_INOUT, cast(uint)g, cast(uint)n, T.sizeof);
}
}
else version (FreeBSD)
{
/* FreeBSD ioctl's encode the command in the lower 16-bits
* and the size of any in/out parameters in the lower 13 bits of the upper
* 16-bits of a 32 bit unsigned integer. The high 3 bits of the upper
* 16-bits encode the in/out status of the parameter.
*/
enum uint IOCPARM_SHIFT = 13; // number of bits for ioctl size
enum uint IOCPARM_MASK = ((1 << IOCPARM_SHIFT) - 1); // parameter length mask
uint IOCPARM_LEN(uint x) // to extract the encoded parameter length
{
return ((x >> 16) & IOCPARM_MASK);
}
uint IOCBASECMD(uint x) // to extract the encoded command
{
return (x & ~(IOCPARM_MASK << 16));
}
uint IOCGROUP(uint x) // to extract the encoded group
{
return ((x >> 8) & 0xff);
}
enum uint IOCPARM_MAX = (1 << IOCPARM_SHIFT); // max size of ioctl args
enum uint IOC_VOID = 0x20000000; // no parameters
enum uint IOC_OUT = 0x40000000; // copy parameters back
enum uint IOC_IN = 0x80000000; // copy parameters into
enum uint IOC_INOUT = (IOC_IN | IOC_OUT);
enum uint IOC_DIRMASK = (IOC_VOID|IOC_OUT|IOC_IN);
// encode the ioctl info into 32 bits
uint _IOC(uint inorout, uint group, uint num, size_t len)
{
return (inorout | ((len & IOCPARM_MASK) << 16) | (group << 8) | num);
}
// encode a command with no parameters
uint _IO(char g, int n)
{
return _IOC(IOC_VOID, cast(uint)g, cast(uint)n, cast(size_t)0);
}
uint _IOWINT(char g, int n)
{
return _IOC(IOC_VOID, cast(uint)g, cast(uint)n, int.sizeof);
}
// encode a command that returns info
uint _IOR(T)(char g, int n)
{
return _IOC(IOC_OUT, cast(uint)g, cast(uint)n, T.sizeof);
}
// encode a command that takes info
uint _IOW(T)(char g, int n)
{
return _IOC(IOC_IN, cast(uint)g, cast(uint)n, T.sizeof);
}
// encode a command that takes info and returns info
uint _IOWR(T)(char g, int n)
{
return _IOC(IOC_INOUT, cast(uint)g, cast(uint)n, T.sizeof);
}
}
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