file.cpp

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/*
 * This file is part of the µOS++ distribution.
 *   (https://github.com/micro-os-plus)
 * Copyright (c) 2015 Liviu Ionescu.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
 
#include <cmsis-plus/posix-io/file.h>
#include <cmsis-plus/posix-io/file-system.h>
 
#include <cmsis-plus/diag/trace.h>
 
#include <cerrno>
 
// ----------------------------------------------------------------------------
 
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wc++98-compat"
#endif
 
// ----------------------------------------------------------------------------
 
namespace os
{
  namespace posix
  {
    // ========================================================================
 
    file::file (file_impl& impl) :
        io
          { impl, type::file }
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file::%s()=%p\n", __func__, this);
#endif
    }
 
    file::~file ()
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file::%s() @%p\n", __func__, this);
#endif
    }
 
    // ------------------------------------------------------------------------
 
    int
    file::close (void)
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file::%s() @%p\n", __func__, this);
#endif
 
      int ret = io::close ();
 
      // Note: the constructor is not called here.
 
      // Link the file object to a list kept by the file system.
      // It will be deallocated at the next open.
      file_system ().add_deferred_file (this);
 
      return ret;
    }
 
    int
    file::ftruncate (off_t length)
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file::%s(%u) @%p\n", __func__, length, this);
#endif
 
      if (length < 0)
        {
          errno = EINVAL;
          return -1;
        }
 
      errno = 0;
 
      // Execute the implementation specific code.
      return impl ().do_ftruncate (length);
    }
 
    int
    file::fsync (void)
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file::%s() @%p\n", __func__, this);
#endif
 
      errno = 0;
 
      // Execute the implementation specific code.
      return impl ().do_fsync ();
    }
 
    int
    file::fstatvfs (struct statvfs *buf)
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file::%s(%p) @%p\n", __func__, buf, this);
#endif
 
      errno = 0;
 
      // Execute the file system code. Might be locked there.
      return file_system ().statvfs (buf);
    }
 
    // ========================================================================
 
    file_impl::file_impl (class file_system& fs) :
        file_system_ (fs)
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file_impl::%s()=%p\n", __func__, this);
#endif
    }
 
    file_impl::~file_impl ()
    {
#if defined(OS_TRACE_POSIX_IO_FILE)
      trace::printf ("file_impl::%s() @%p\n", __func__, this);
#endif
    }
 
    // ------------------------------------------------------------------------
 
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
 
    int
    file_impl::do_ftruncate (off_t length)
    {
      errno = ENOSYS; // Not implemented
      return -1;
    }
 
#pragma GCC diagnostic pop
 
    int
    file_impl::do_fsync (void)
    {
      errno = ENOSYS; // Not implemented
      return -1;
    }
 
  // ==========================================================================
  } /* namespace posix */
} /* namespace os */
 
// ----------------------------------------------------------------------------