os::posix::file_descriptors_manager Class Reference

File descriptors manager static class.<cmsis-plus/posix-io/file-descriptors-manager.h> More...

#include <file-descriptors-manager.h>

Public Member Functions
Constructors & Destructor
	file_descriptors_manager (std::size_t size)
	~file_descriptors_manager ()

Static Public Member Functions
Public Static Member Functions
static size_t	size (void)
static bool	valid (int fildes)
static class io *	io (int fildes)
static class socket *	socket (int fildes)
static int	allocate (class io *io)
static int	assign (file_descriptor_t fildes, class io *io)
static int	deallocate (file_descriptor_t fildes)
static size_t	used (void)

Detailed Description

Definition at line 58 of file file-descriptors-manager.h.

Constructor & Destructor Documentation

file_descriptors_manager()

os::posix::file_descriptors_manager::file_descriptors_manager

(

std::size_t

size

)

Definition at line 58 of file file-descriptors-manager.cpp.

    {
      trace::printf ("file_descriptors_manager::%s(%d)=%p\n", __func__, size,
                     this);
 
      assert (size > 0);
 
      size__ = size + reserved__; // Add space for standard files.
      descriptors_array__ = new class io*[size__];
 
      for (std::size_t i = 0; i < file_descriptors_manager::size (); ++i)
        {
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
          descriptors_array__[i] = nullptr;
#pragma GCC diagnostic pop
        }
    }

References os::trace::printf(), and size().

~file_descriptors_manager()

os::posix::file_descriptors_manager::~file_descriptors_manager

(

)

Definition at line 79 of file file-descriptors-manager.cpp.

    {
      trace::printf ("file_descriptors_manager::%s(%) @%p\n", __func__, this);
 
      delete[] descriptors_array__;
      size__ = 0;
    }

References os::trace::printf().

Member Function Documentation

allocate()

int os::posix::file_descriptors_manager::allocate ( class io *  io )

static

Definition at line 117 of file file-descriptors-manager.cpp.

    {
#if defined(OS_TRACE_POSIX_IO_FILE_DESCRIPTORS_MANAGER)
      trace::printf ("file_descriptors_manager::%s(%p)\n", __func__, io);
#endif
 
      if (io->file_descriptor () >= 0)
        {
          // Already allocated
          errno = EBUSY;
          return -1;
        }
 
      for (std::size_t i = reserved__; i < size__; ++i)
        {
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
          if (descriptors_array__[i] == nullptr)
            {
              descriptors_array__[i] = io;
              io->file_descriptor (static_cast<int> (i));
#if defined(OS_TRACE_POSIX_IO_FILE_DESCRIPTORS_MANAGER)
              trace::printf ("file_descriptors_manager::%s(%p) fd=%d\n",
                             __func__, io, i);
#endif
              return static_cast<int> (i);
            }
#pragma GCC diagnostic pop
        }
 
      // Too many files open in system.
      errno = ENFILE;
      return -1;
    }

References os::posix::io::file_descriptor(), and os::trace::printf().

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

assign()

int os::posix::file_descriptors_manager::assign ( file_descriptor_t  fildes, class io *  io  )

static

Definition at line 155 of file file-descriptors-manager.cpp.

    {
      if ((fildes < 0) || (static_cast<std::size_t> (fildes) >= size__))
        {
          errno = EBADF;
          return -1;
        }
 
      if (io->file_descriptor () >= 0)
        {
          // Already allocated
          errno = EBUSY;
          return -1;
        }
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
      descriptors_array__[fildes] = io;
#pragma GCC diagnostic pop
      io->file_descriptor (fildes);
      return fildes;
    }

References os::posix::io::file_descriptor().

deallocate()

int os::posix::file_descriptors_manager::deallocate ( file_descriptor_t  fildes )

static

Definition at line 181 of file file-descriptors-manager.cpp.

    {
#if defined(OS_TRACE_POSIX_IO_FILE_DESCRIPTORS_MANAGER)
      trace::printf ("file_descriptors_manager::%s(%d)\n", __func__, fildes);
#endif
 
      if ((fildes < 0) || (static_cast<std::size_t> (fildes) >= size__))
        {
          errno = EBADF;
          return -1;
        }
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
      descriptors_array__[fildes]->clear_file_descriptor ();
      descriptors_array__[fildes] = nullptr;
#pragma GCC diagnostic pop
      return 0;
    }

References os::trace::printf().

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

io()

io * os::posix::file_descriptors_manager::io ( int  fildes )

static

Definition at line 90 of file file-descriptors-manager.cpp.

    {
      // Check if valid descriptor or buffer not yet initialised
      if ((fildes < 0) || (static_cast<std::size_t> (fildes) >= size__)
          || (descriptors_array__ == nullptr))
        {
          return nullptr;
        }
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
      return descriptors_array__[fildes];
#pragma GCC diagnostic pop
    }

Referenced by __posix_close(), __posix_fcntl(), __posix_fstat(), __posix_fstatvfs(), __posix_fsync(), __posix_ftruncate(), __posix_ioctl(), __posix_isatty(), __posix_lseek(), __posix_read(), __posix_tcdrain(), __posix_tcflush(), __posix_tcgetattr(), __posix_tcsendbreak(), __posix_tcsetattr(), __posix_write(), and __posix_writev().

size()

size_t os::posix::file_descriptors_manager::size ( void  )

inlinestatic

Definition at line 168 of file file-descriptors-manager.h.

    {
      return size__;
    }

Referenced by file_descriptors_manager(), and used().

socket()

socket * os::posix::file_descriptors_manager::socket ( int  fildes )

static

Definition at line 204 of file file-descriptors-manager.cpp.

    {
      assert ((fildes >= 0) && (static_cast<std::size_t> (fildes) < size__));
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
      auto* const io = descriptors_array__[fildes];
#pragma GCC diagnostic pop
      if (io->get_type () != static_cast<posix::io::type_t> (io::type::socket))
        {
          return nullptr;
        }
      return reinterpret_cast<class socket*> (io);
    }

References os::posix::io::get_type(), and os::posix::io::socket.

Referenced by __posix_accept(), __posix_bind(), __posix_connect(), __posix_getpeername(), __posix_getsockname(), __posix_getsockopt(), __posix_listen(), __posix_recv(), __posix_recvfrom(), __posix_recvmsg(), __posix_send(), __posix_sendmsg(), __posix_sendto(), __posix_setsockopt(), __posix_shutdown(), and __posix_sockatmark().

used()

size_t os::posix::file_descriptors_manager::used ( void  )

static

Definition at line 221 of file file-descriptors-manager.cpp.

    {
      std::size_t count = reserved__;
      for (std::size_t i = reserved__; i < file_descriptors_manager::size ();
           ++i)
        {
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#endif
          if (descriptors_array__[i] != nullptr)
            {
              ++count;
            }
#pragma GCC diagnostic pop
        }
      return count;
    }

References size().

valid()

bool os::posix::file_descriptors_manager::valid ( int  fildes )

static

Definition at line 107 of file file-descriptors-manager.cpp.

    {
      if ((fildes < 0) || (static_cast<std::size_t> (fildes) >= size__))
        {
          return false;
        }
      return true;
    }

---

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

• file-descriptors-manager.h
• file-descriptors-manager.cpp