block-device-partition.cpp

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/*
 * This file is part of the µOS++ project (https://micro-os-plus.github.io/).
 * Copyright (c) 2018-2025 Liviu Ionescu. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software
 * for any purpose is hereby granted, under the terms of the MIT license.
 *
 * If a copy of the license was not distributed with this file, it can
 * be obtained from https://opensource.org/licenses/mit.
 */
 
#if defined(OS_USE_OS_APP_CONFIG_H)
#include <cmsis-plus/os-app-config.h>
#endif
 
#include <cmsis-plus/posix-io/block-device-partition.h>
 
#include <cmsis-plus/diag/trace.h>
 
// ----------------------------------------------------------------------------
 
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wc++98-compat"
#endif
 
// ----------------------------------------------------------------------------
 
namespace os
{
  namespace posix
  {
    // ========================================================================
 
    block_device_partition::block_device_partition (block_device_impl& impl,
                                                    const char* name)
        : block_device{ impl, name }
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition::%s(\"%s\")=@%p\n", __func__,
                     name_, this);
#endif
    }
 
    block_device_partition::~block_device_partition ()
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition::%s() @%p %s\n", __func__, this,
                     name_);
#endif
    }
 
    // ------------------------------------------------------------------------
 
    void
    block_device_partition::configure (blknum_t offset, blknum_t nblocks)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition::%s(%u,%u) @%p\n", __func__,
                     offset, nblocks, this);
#endif
 
      impl ().configure (offset, nblocks);
    }
 
    // ========================================================================
 
    block_device_partition_impl::block_device_partition_impl (
        block_device& parent)
        : parent_ (parent)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s()=@%p\n", __func__,
                     this);
#endif
    }
 
    block_device_partition_impl::~block_device_partition_impl ()
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s() @%p\n", __func__,
                     this);
#endif
    }
 
    // ------------------------------------------------------------------------
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunused-parameter"
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
 
    int
    block_device_partition_impl::do_vioctl (int request, std::va_list args)
    {
      errno = ENOSYS;
      return -1;
    }
 
#pragma GCC diagnostic pop
 
    void
    block_device_partition_impl::configure (blknum_t offset, blknum_t nblocks)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s(%u,%u) @%p\n", __func__,
                     offset, nblocks, this);
#endif
 
      partition_offset_blocks_ = offset;
      assert (nblocks > 0);
      num_blocks_ = nblocks;
 
      // Inherit from parent.
      block_logical_size_bytes_ = parent_.block_logical_size_bytes ();
      block_physical_size_bytes_ = parent_.block_physical_size_bytes ();
    }
 
    int
    block_device_partition_impl::do_vopen (const char* path, int oflag,
                                           std::va_list args)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s(%d) @%p\n", __func__,
                     oflag, this);
#endif
 
      return parent_.vopen (path, oflag, args);
    }
 
    ssize_t
    block_device_partition_impl::do_read_block (void* buf, blknum_t blknum,
                                                std::size_t nblocks)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s(0x%X, %u, %u) @%p\n",
                     __func__, buf, blknum, nblocks, this);
#endif
 
      return parent_.read_block (buf, blknum + partition_offset_blocks_,
                                 nblocks);
    }
 
    ssize_t
    block_device_partition_impl::do_write_block (const void* buf,
                                                 blknum_t blknum,
                                                 std::size_t nblocks)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s(0x%X, %u, %u) @%p\n",
                     __func__, buf, blknum, nblocks, this);
#endif
 
      return parent_.write_block (buf, blknum + partition_offset_blocks_,
                                  nblocks);
    }
 
    void
    block_device_partition_impl::do_sync (void)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s() @%p\n", __func__,
                     this);
#endif
 
      return parent_.sync ();
    }
 
    int
    block_device_partition_impl::do_close (void)
    {
#if defined(OS_TRACE_POSIX_IO_BLOCK_DEVICE_PARTITION)
      trace::printf ("block_device_partition_impl::%s() @%p\n", __func__,
                     this);
#endif
 
      return parent_.close ();
    }
 
    // ========================================================================
  } /* namespace posix */
} /* namespace os */
 
// ----------------------------------------------------------------------------