166 lines
3.8 KiB
C++
166 lines
3.8 KiB
C++
|
/*
|
||
|
* This file is part of libgim.
|
||
|
*
|
||
|
* libgim is free software: you can redistribute it and/or modify it under the
|
||
|
* terms of the GNU General Public License as published by the Free Software
|
||
|
* Foundation, either version 3 of the License, or (at your option) any later
|
||
|
* version.
|
||
|
*
|
||
|
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
|
||
|
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
||
|
* details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
|
||
|
*
|
||
|
* Copyright 2014 Danny Robson <danny@nerdcruft.net>
|
||
|
*/
|
||
|
|
||
|
#include "io_win32.hpp"
|
||
|
|
||
|
#include "debug.hpp"
|
||
|
#include "except.hpp"
|
||
|
|
||
|
#include <windows.h>
|
||
|
|
||
|
using util::detail::win32::mapped_file;
|
||
|
|
||
|
|
||
|
//-----------------------------------------------------------------------------
|
||
|
static DWORD
|
||
|
access_to_flags (util::access_t a) {
|
||
|
switch (a) {
|
||
|
case util::ACCESS_READ:
|
||
|
return GENERIC_READ;
|
||
|
|
||
|
case util::ACCESS_WRITE:
|
||
|
return GENERIC_WRITE;
|
||
|
|
||
|
default:
|
||
|
unreachable ();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
//-----------------------------------------------------------------------------
|
||
|
mapped_file::mapped_file (const boost::filesystem::path &path,
|
||
|
access_t access):
|
||
|
m_data (nullptr, UnmapViewOfFile)
|
||
|
{
|
||
|
std::cerr << "mapped_file\n";
|
||
|
|
||
|
m_file.reset (CreateFile (path.string ().c_str (),
|
||
|
access_to_flags (access),
|
||
|
access == ACCESS_READ ? FILE_SHARE_READ : 0,
|
||
|
nullptr,
|
||
|
OPEN_EXISTING,
|
||
|
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
|
||
|
0));
|
||
|
|
||
|
if (m_file == INVALID_HANDLE_VALUE)
|
||
|
win32_error::throw_code ();
|
||
|
std::cerr << "mapped_file: file\n";
|
||
|
|
||
|
m_mapping.reset (CreateFileMapping (m_file,
|
||
|
nullptr,
|
||
|
access == ACCESS_READ ? PAGE_READONLY : PAGE_READWRITE,
|
||
|
0, 0,
|
||
|
nullptr));
|
||
|
|
||
|
if (m_mapping == INVALID_HANDLE_VALUE)
|
||
|
win32_error::throw_code ();
|
||
|
std::cerr << "mapped_file: mapping\n";
|
||
|
|
||
|
auto view = MapViewOfFile (m_mapping,
|
||
|
access == ACCESS_READ ? FILE_MAP_READ : FILE_MAP_WRITE,
|
||
|
0, 0,
|
||
|
0);
|
||
|
if (view == nullptr)
|
||
|
win32_error::throw_code ();
|
||
|
std::cerr << "mapped_file: view\n";
|
||
|
|
||
|
m_data.reset (
|
||
|
static_cast<unsigned char*> (view)
|
||
|
);
|
||
|
|
||
|
m_size = GetFileSize (m_file, nullptr);
|
||
|
std::cout << "size: " << m_size << '\n';
|
||
|
}
|
||
|
|
||
|
|
||
|
//-----------------------------------------------------------------------------
|
||
|
const uint8_t*
|
||
|
mapped_file::data (void) const
|
||
|
{
|
||
|
return m_data.get ();
|
||
|
}
|
||
|
|
||
|
|
||
|
uint8_t*
|
||
|
mapped_file::data (void)
|
||
|
{
|
||
|
return m_data.get ();
|
||
|
}
|
||
|
|
||
|
|
||
|
size_t
|
||
|
mapped_file::size (void) const
|
||
|
{
|
||
|
return m_size;
|
||
|
}
|
||
|
|
||
|
|
||
|
uint8_t*
|
||
|
mapped_file::begin (void)
|
||
|
{
|
||
|
return data ();
|
||
|
}
|
||
|
|
||
|
uint8_t*
|
||
|
mapped_file::end (void)
|
||
|
{
|
||
|
return data () + size ();
|
||
|
}
|
||
|
|
||
|
|
||
|
const uint8_t*
|
||
|
mapped_file::cbegin (void) const
|
||
|
{
|
||
|
return data ();
|
||
|
}
|
||
|
|
||
|
const uint8_t*
|
||
|
mapped_file::cend (void) const
|
||
|
{
|
||
|
return data () + size ();
|
||
|
}
|
||
|
|
||
|
|
||
|
//-----------------------------------------------------------------------------
|
||
|
util::handle_ref::handle_ref ():
|
||
|
handle (INVALID_HANDLE_VALUE)
|
||
|
{ ; }
|
||
|
|
||
|
|
||
|
util::handle_ref::~handle_ref ()
|
||
|
{
|
||
|
reset (INVALID_HANDLE_VALUE);
|
||
|
}
|
||
|
|
||
|
|
||
|
void
|
||
|
util::handle_ref::reset (HANDLE _handle)
|
||
|
{
|
||
|
if (handle != INVALID_HANDLE_VALUE)
|
||
|
if (!CloseHandle (handle))
|
||
|
win32_error::throw_code ();
|
||
|
|
||
|
handle = _handle;
|
||
|
}
|
||
|
|
||
|
|
||
|
util::handle_ref::operator HANDLE (void) const
|
||
|
{
|
||
|
return handle;
|
||
|
}
|