157 lines
3.5 KiB
C++
157 lines
3.5 KiB
C++
/*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* 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)
|
|
{
|
|
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 ();
|
|
|
|
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 ();
|
|
|
|
auto view = MapViewOfFile (m_mapping,
|
|
access == ACCESS_READ ? FILE_MAP_READ : FILE_MAP_WRITE,
|
|
0, 0,
|
|
0);
|
|
if (view == nullptr)
|
|
win32_error::throw_code ();
|
|
|
|
m_data.reset (
|
|
static_cast<unsigned char*> (view)
|
|
);
|
|
|
|
m_size = GetFileSize (m_file, nullptr);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
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;
|
|
}
|