src/libstd/sys/vxworks/ext/io.rs

   1 //! Unix-specific extensions to general I/O primitives
   2
   3 #![stable(feature = "rust1", since = "1.0.0")]
   4
   5 use crate::fs;
   6 use crate::os::raw;
   7 use crate::sys;
   8 use crate::io;
   9 use crate::sys_common::{self, AsInner, FromInner, IntoInner};
  10 use crate::net;
  11
  12 /// Raw file descriptors.
  13 #[stable(feature = "rust1", since = "1.0.0")]
  14 pub type RawFd = raw::c_int;
  15
  16 /// A trait to extract the raw unix file descriptor from an underlying
  17 /// object.
  18 ///
  19 /// This is only available on unix platforms and must be imported in order
  20 /// to call the method. Windows platforms have a corresponding `AsRawHandle`
  21 /// and `AsRawSocket` set of traits.
  22 #[stable(feature = "rust1", since = "1.0.0")]
  23 pub trait AsRawFd {
  24     /// Extracts the raw file descriptor.
  25     ///
  26     /// This method does **not** pass ownership of the raw file descriptor
  27     /// to the caller. The descriptor is only guaranteed to be valid while
  28     /// the original object has not yet been destroyed.
  29     #[stable(feature = "rust1", since = "1.0.0")]
  30     fn as_raw_fd(&self) -> RawFd;
  31 }
  32
  33 /// A trait to express the ability to construct an object from a raw file
  34 /// descriptor.
  35 #[stable(feature = "from_raw_os", since = "1.1.0")]
  36 pub trait FromRawFd {
  37     /// Constructs a new instance of `Self` from the given raw file
  38     /// descriptor.
  39     ///
  40     /// This function **consumes ownership** of the specified file
  41     /// descriptor. The returned object will take responsibility for closing
  42     /// it when the object goes out of scope.
  43     ///
  44     /// This function is also unsafe as the primitives currently returned
  45     /// have the contract that they are the sole owner of the file
  46     /// descriptor they are wrapping. Usage of this function could
  47     /// accidentally allow violating this contract which can cause memory
  48     /// unsafety in code that relies on it being true.
  49     #[stable(feature = "from_raw_os", since = "1.1.0")]
  50     unsafe fn from_raw_fd(fd: RawFd) -> Self;
  51 }
  52
  53 /// A trait to express the ability to consume an object and acquire ownership of
  54 /// its raw file descriptor.
  55 #[stable(feature = "into_raw_os", since = "1.4.0")]
  56 pub trait IntoRawFd {
  57     /// Consumes this object, returning the raw underlying file descriptor.
  58     ///
  59     /// This function **transfers ownership** of the underlying file descriptor
  60     /// to the caller. Callers are then the unique owners of the file descriptor
  61     /// and must close the descriptor once it's no longer needed.
  62     #[stable(feature = "into_raw_os", since = "1.4.0")]
  63     fn into_raw_fd(self) -> RawFd;
  64 }
  65
  66 #[stable(feature = "rust1", since = "1.0.0")]
  67 impl AsRawFd for fs::File {
  68     fn as_raw_fd(&self) -> RawFd {
  69         self.as_inner().fd().raw()
  70     }
  71 }
  72 #[stable(feature = "from_raw_os", since = "1.1.0")]
  73 impl FromRawFd for fs::File {
  74     unsafe fn from_raw_fd(fd: RawFd) -> fs::File {
  75         fs::File::from_inner(sys::fs::File::from_inner(fd))
  76     }
  77 }
  78 #[stable(feature = "into_raw_os", since = "1.4.0")]
  79 impl IntoRawFd for fs::File {
  80     fn into_raw_fd(self) -> RawFd {
  81         self.into_inner().into_fd().into_raw()
  82     }
  83 }
  84
  85 #[stable(feature = "asraw_stdio", since = "1.21.0")]
  86 impl AsRawFd for io::Stdin {
  87     fn as_raw_fd(&self) -> RawFd { libc::STDIN_FILENO }
  88 }
  89
  90 #[stable(feature = "asraw_stdio", since = "1.21.0")]
  91 impl AsRawFd for io::Stdout {
  92     fn as_raw_fd(&self) -> RawFd { libc::STDOUT_FILENO }
  93 }
  94
  95 #[stable(feature = "asraw_stdio", since = "1.21.0")]
  96 impl AsRawFd for io::Stderr {
  97     fn as_raw_fd(&self) -> RawFd { libc::STDERR_FILENO }
  98 }
  99
 100 #[stable(feature = "asraw_stdio_locks", since = "1.35.0")]
 101 impl<'a> AsRawFd for io::StdinLock<'a> {
 102     fn as_raw_fd(&self) -> RawFd { libc::STDIN_FILENO }
 103 }
 104
 105 #[stable(feature = "asraw_stdio_locks", since = "1.35.0")]
 106 impl<'a> AsRawFd for io::StdoutLock<'a> {
 107     fn as_raw_fd(&self) -> RawFd { libc::STDOUT_FILENO }
 108 }
 109
 110 #[stable(feature = "asraw_stdio_locks", since = "1.35.0")]
 111 impl<'a> AsRawFd for io::StderrLock<'a> {
 112     fn as_raw_fd(&self) -> RawFd { libc::STDERR_FILENO }
 113 }
 114
 115 #[stable(feature = "rust1", since = "1.0.0")]
 116 impl AsRawFd for net::TcpStream {
 117     fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
 118 }
 119
 120 #[stable(feature = "rust1", since = "1.0.0")]
 121 impl AsRawFd for net::TcpListener {
 122     fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
 123 }
 124
 125 #[stable(feature = "rust1", since = "1.0.0")]
 126 impl AsRawFd for net::UdpSocket {
 127     fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
 128 }
 129
 130 #[stable(feature = "from_raw_os", since = "1.1.0")]
 131 impl FromRawFd for net::TcpStream {
 132     unsafe fn from_raw_fd(fd: RawFd) -> net::TcpStream {
 133         let socket = sys::net::Socket::from_inner(fd);
 134         net::TcpStream::from_inner(sys_common::net::TcpStream::from_inner(socket))
 135     }
 136 }
 137
 138 #[stable(feature = "from_raw_os", since = "1.1.0")]
 139 impl FromRawFd for net::TcpListener {
 140     unsafe fn from_raw_fd(fd: RawFd) -> net::TcpListener {
 141         let socket = sys::net::Socket::from_inner(fd);
 142         net::TcpListener::from_inner(sys_common::net::TcpListener::from_inner(socket))
 143     }
 144 }
 145
 146 #[stable(feature = "from_raw_os", since = "1.1.0")]
 147 impl FromRawFd for net::UdpSocket {
 148     unsafe fn from_raw_fd(fd: RawFd) -> net::UdpSocket {
 149         let socket = sys::net::Socket::from_inner(fd);
 150         net::UdpSocket::from_inner(sys_common::net::UdpSocket::from_inner(socket))
 151     }
 152 }
 153
 154 #[stable(feature = "into_raw_os", since = "1.4.0")]
 155 impl IntoRawFd for net::TcpStream {
 156     fn into_raw_fd(self) -> RawFd {
 157         self.into_inner().into_socket().into_inner()
 158     }
 159 }
 160 #[stable(feature = "into_raw_os", since = "1.4.0")]
 161 impl IntoRawFd for net::TcpListener {
 162     fn into_raw_fd(self) -> RawFd {
 163         self.into_inner().into_socket().into_inner()
 164     }
 165 }
 166 #[stable(feature = "into_raw_os", since = "1.4.0")]
 167 impl IntoRawFd for net::UdpSocket {
 168     fn into_raw_fd(self) -> RawFd {
 169         self.into_inner().into_socket().into_inner()
 170     }
 171 }