os::posix::io_impl Class Reference

#include <io.h>

Inheritance diagram for os::posix::io_impl:

Public Member Functions
Constructors & Destructor
	io_impl (void)
virtual	~io_impl ()
Public Member Functions
virtual void	do_deallocate (void)
virtual bool	do_is_opened (void)=0
virtual bool	do_is_connected (void)
virtual ssize_t	do_read (void *buf, std::size_t nbyte)=0
virtual ssize_t	do_write (const void *buf, std::size_t nbyte)=0
virtual ssize_t	do_writev (const iovec *iov, int iovcnt)
virtual int	do_vfcntl (int cmd, std::va_list args)
virtual int	do_isatty (void)
virtual int	do_fstat (struct stat *buf)
virtual off_t	do_lseek (off_t offset, int whence)=0
virtual int	do_close (void)=0
off_t	offset (void)
void	offset (off_t offset)

Friends
class	io

Detailed Description

Definition at line 303 of file io.h.

Constructor & Destructor Documentation

io_impl()

os::posix::io_impl::io_impl

(

void

)

Definition at line 467 of file io.cpp.

    {
#if defined(OS_TRACE_POSIX_IO_IO)
      trace::printf ("io_impl::%s()=%p\n", __func__, this);
#endif
    }

References os::trace::printf().

~io_impl()

os::posix::io_impl::~io_impl ( )

virtual

Definition at line 474 of file io.cpp.

    {
#if defined(OS_TRACE_POSIX_IO_IO)
      trace::printf ("io_impl::%s() @%p\n", __func__, this);
#endif
    }

References os::trace::printf().

Member Function Documentation

do_close()

virtual int os::posix::io_impl::do_close ( void  )

pure virtual

Implemented in os::posix::block_device_partition_impl.

Referenced by os::posix::io::alloc_file_descriptor(), and os::posix::io::close().

do_deallocate()

void os::posix::io_impl::do_deallocate ( void  )

virtual

Definition at line 482 of file io.cpp.

    {
      return;
    }

do_fstat()

int os::posix::io_impl::do_fstat ( struct stat *  buf )

virtual

Definition at line 539 of file io.cpp.

    {
      errno = ENOSYS; // Not implemented
      return -1;
    }

Referenced by os::posix::io::fstat().

do_is_connected()

bool os::posix::io_impl::do_is_connected ( void  )

virtual

Definition at line 496 of file io.cpp.

    {
      return true;
    }

do_is_opened()

virtual bool os::posix::io_impl::do_is_opened ( void  )

pure virtual

Implemented in os::posix::device_impl.

Referenced by os::posix::io::is_opened().

do_isatty()

int os::posix::io_impl::do_isatty ( void  )

virtual

Reimplemented in os::posix::tty_impl.

Definition at line 532 of file io.cpp.

    {
      errno = ENOTTY; // By default, it is not a TTY.
      return 0;
    }

Referenced by os::posix::io::isatty().

do_lseek()

virtual off_t os::posix::io_impl::do_lseek ( off_t  offset, int  whence  )

pure virtual

Implemented in os::posix::block_device_impl, and os::posix::char_device_impl.

Referenced by os::posix::io::lseek().

do_read()

virtual ssize_t os::posix::io_impl::do_read ( void *  buf, std::size_t  nbyte  )

pure virtual

Implemented in os::posix::block_device_impl.

Referenced by os::posix::io::read().

do_vfcntl()

int os::posix::io_impl::do_vfcntl ( int  cmd, std::va_list  args  )

virtual

Definition at line 525 of file io.cpp.

    {
      errno = ENOSYS; // Not implemented
      return -1;
    }

Referenced by os::posix::io::vfcntl().

do_write()

virtual ssize_t os::posix::io_impl::do_write ( const void *  buf, std::size_t  nbyte  )

pure virtual

Implemented in os::posix::block_device_impl.

Referenced by do_writev(), and os::posix::io::write().

do_writev()

ssize_t os::posix::io_impl::do_writev ( const iovec *  iov, int  iovcnt  )

virtual

Definition at line 502 of file io.cpp.

    {
      ssize_t total = 0;
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
      const /* struct */ iovec* p = iov;
      for (int i = 0; i < iovcnt; ++i, ++p)
        {
          ssize_t ret = do_write (p->iov_base, p->iov_len);
          if (ret < 0)
            {
              return ret;
            }
          total += ret;
        }
#pragma GCC diagnostic pop
      return total;
    }

References do_write(), iovec::iov_base, and iovec::iov_len.

Referenced by os::posix::io::writev().

offset() [1/2]

void os::posix::io_impl::offset ( off_t  offset )

inline

Definition at line 478 of file io.h.

    {
      offset_ = offset;
    }

References offset().

offset() [2/2]

off_t os::posix::io_impl::offset ( void  )

inline

Definition at line 472 of file io.h.

    {
      return offset_;
    }

Referenced by os::posix::block_device_partition_impl::configure(), os::posix::block_device_impl::do_lseek(), and offset().

Friends And Related Symbol Documentation

io

friend class io

friend

Definition at line 307 of file io.h.

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The documentation for this class was generated from the following files:

• io.h
• io.cpp