mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-10 03:16:17 +01:00
gio: add GWin32FileSyncStream
This is a COM object that implements IStream by using a HANDLE and WinAPI file functions to access the file (only a file; pipes are not supported). Only supports synchronous access (this is a feature - the APIs that read from this stream internally will never return the COM equivalent of EWOULDBLOCK, which greatly simplifies their use).
This commit is contained in:
Руслан Ижбулатов
parent
fdfa9236a2
commit
895fc2eff2
508
gio/gwin32file-sync-stream.c
Executable file
508
gio/gwin32file-sync-stream.c
Executable file
@ -0,0 +1,508 @@
|
|||||||
|
/* gwin32file-sync-stream.c - a simple IStream implementation
|
||||||
|
*
|
||||||
|
* Copyright 2020 Руслан Ижбулатов
|
||||||
|
*
|
||||||
|
* This library is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU Lesser General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2.1 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This library 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
|
||||||
|
* Lesser General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU Lesser General Public License
|
||||||
|
* along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* A COM object that implements an IStream backed by a file HANDLE.
|
||||||
|
* Works just like `SHCreateStreamOnFileEx()`, but does not
|
||||||
|
* support locking, and doesn't force us to link to libshlwapi.
|
||||||
|
* Only supports synchronous access.
|
||||||
|
*/
|
||||||
|
#include "config.h"
|
||||||
|
#define COBJMACROS
|
||||||
|
#define INITGUID
|
||||||
|
#include <windows.h>
|
||||||
|
|
||||||
|
#include "gwin32file-sync-stream.h"
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_query_interface (IStream *self_ptr,
|
||||||
|
REFIID ref_interface_guid,
|
||||||
|
LPVOID *output_object_ptr);
|
||||||
|
static ULONG STDMETHODCALLTYPE _file_sync_stream_release (IStream *self_ptr);
|
||||||
|
static ULONG STDMETHODCALLTYPE _file_sync_stream_add_ref (IStream *self_ptr);
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_read (IStream *self_ptr,
|
||||||
|
void *output_data,
|
||||||
|
ULONG bytes_to_read,
|
||||||
|
ULONG *output_bytes_read);
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_write (IStream *self_ptr,
|
||||||
|
const void *data,
|
||||||
|
ULONG bytes_to_write,
|
||||||
|
ULONG *output_bytes_written);
|
||||||
|
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_clone (IStream *self_ptr,
|
||||||
|
IStream **output_clone_ptr);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_commit (IStream *self_ptr,
|
||||||
|
DWORD commit_flags);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_copy_to (IStream *self_ptr,
|
||||||
|
IStream *output_stream,
|
||||||
|
ULARGE_INTEGER bytes_to_copy,
|
||||||
|
ULARGE_INTEGER *output_bytes_read,
|
||||||
|
ULARGE_INTEGER *output_bytes_written);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_lock_region (IStream *self_ptr,
|
||||||
|
ULARGE_INTEGER lock_offset,
|
||||||
|
ULARGE_INTEGER lock_bytes,
|
||||||
|
DWORD lock_type);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_revert (IStream *self_ptr);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_seek (IStream *self_ptr,
|
||||||
|
LARGE_INTEGER move_distance,
|
||||||
|
DWORD origin,
|
||||||
|
ULARGE_INTEGER *output_new_position);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_set_size (IStream *self_ptr,
|
||||||
|
ULARGE_INTEGER new_size);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_stat (IStream *self_ptr,
|
||||||
|
STATSTG *output_stat,
|
||||||
|
DWORD flags);
|
||||||
|
static HRESULT STDMETHODCALLTYPE _file_sync_stream_unlock_region (IStream *self_ptr,
|
||||||
|
ULARGE_INTEGER lock_offset,
|
||||||
|
ULARGE_INTEGER lock_bytes,
|
||||||
|
DWORD lock_type);
|
||||||
|
|
||||||
|
static void _file_sync_stream_free (GWin32FileSyncStream *self);
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_query_interface (IStream *self_ptr,
|
||||||
|
REFIID ref_interface_guid,
|
||||||
|
LPVOID *output_object_ptr)
|
||||||
|
{
|
||||||
|
*output_object_ptr = NULL;
|
||||||
|
|
||||||
|
if (IsEqualGUID (ref_interface_guid, &IID_IUnknown))
|
||||||
|
{
|
||||||
|
IUnknown_AddRef ((IUnknown *) self_ptr);
|
||||||
|
*output_object_ptr = self_ptr;
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
else if (IsEqualGUID (ref_interface_guid, &IID_IStream))
|
||||||
|
{
|
||||||
|
IStream_AddRef (self_ptr);
|
||||||
|
*output_object_ptr = self_ptr;
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
return E_NOINTERFACE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ULONG STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_add_ref (IStream *self_ptr)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
|
||||||
|
return ++self->ref_count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ULONG STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_release (IStream *self_ptr)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
|
||||||
|
int ref_count = --self->ref_count;
|
||||||
|
|
||||||
|
if (ref_count == 0)
|
||||||
|
_file_sync_stream_free (self);
|
||||||
|
|
||||||
|
return ref_count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_read (IStream *self_ptr,
|
||||||
|
void *output_data,
|
||||||
|
ULONG bytes_to_read,
|
||||||
|
ULONG *output_bytes_read)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
DWORD bytes_read;
|
||||||
|
|
||||||
|
if (!ReadFile (self->file_handle, output_data, bytes_to_read, &bytes_read, NULL))
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (output_bytes_read)
|
||||||
|
*output_bytes_read = bytes_read;
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_write (IStream *self_ptr,
|
||||||
|
const void *data,
|
||||||
|
ULONG bytes_to_write,
|
||||||
|
ULONG *output_bytes_written)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
DWORD bytes_written;
|
||||||
|
|
||||||
|
if (!WriteFile (self->file_handle, data, bytes_to_write, &bytes_written, NULL))
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (output_bytes_written)
|
||||||
|
*output_bytes_written = bytes_written;
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_seek (IStream *self_ptr,
|
||||||
|
LARGE_INTEGER move_distance,
|
||||||
|
DWORD origin,
|
||||||
|
ULARGE_INTEGER *output_new_position)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
LARGE_INTEGER new_position;
|
||||||
|
DWORD move_method;
|
||||||
|
|
||||||
|
switch (origin)
|
||||||
|
{
|
||||||
|
case STREAM_SEEK_SET:
|
||||||
|
move_method = FILE_BEGIN;
|
||||||
|
break;
|
||||||
|
case STREAM_SEEK_CUR:
|
||||||
|
move_method = FILE_CURRENT;
|
||||||
|
break;
|
||||||
|
case STREAM_SEEK_END:
|
||||||
|
move_method = FILE_END;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
return E_INVALIDARG;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!SetFilePointerEx (self->file_handle, move_distance, &new_position, move_method))
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
(*output_new_position).QuadPart = new_position.QuadPart;
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_set_size (IStream *self_ptr,
|
||||||
|
ULARGE_INTEGER new_size)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
FILE_END_OF_FILE_INFO info;
|
||||||
|
|
||||||
|
info.EndOfFile.QuadPart = new_size.QuadPart;
|
||||||
|
|
||||||
|
if (SetFileInformationByHandle (self->file_handle, FileEndOfFileInfo, &info, sizeof (info)))
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_copy_to (IStream *self_ptr,
|
||||||
|
IStream *output_stream,
|
||||||
|
ULARGE_INTEGER bytes_to_copy,
|
||||||
|
ULARGE_INTEGER *output_bytes_read,
|
||||||
|
ULARGE_INTEGER *output_bytes_written)
|
||||||
|
{
|
||||||
|
ULARGE_INTEGER counter;
|
||||||
|
ULARGE_INTEGER written_counter;
|
||||||
|
ULARGE_INTEGER read_counter;
|
||||||
|
|
||||||
|
counter.QuadPart = bytes_to_copy.QuadPart;
|
||||||
|
written_counter.QuadPart = 0;
|
||||||
|
read_counter.QuadPart = 0;
|
||||||
|
|
||||||
|
while (counter.QuadPart > 0)
|
||||||
|
{
|
||||||
|
HRESULT hr;
|
||||||
|
ULONG bytes_read;
|
||||||
|
ULONG bytes_written;
|
||||||
|
ULONG bytes_index;
|
||||||
|
#define _INTERNAL_BUFSIZE 1024
|
||||||
|
BYTE buffer[_INTERNAL_BUFSIZE];
|
||||||
|
#undef _INTERNAL_BUFSIZE
|
||||||
|
ULONG buffer_size = sizeof (buffer);
|
||||||
|
ULONG to_read = buffer_size;
|
||||||
|
|
||||||
|
if (counter.QuadPart < buffer_size)
|
||||||
|
to_read = (ULONG) counter.QuadPart;
|
||||||
|
|
||||||
|
/* Because MS SDK has a function IStream_Read() with 3 arguments */
|
||||||
|
hr = self_ptr->lpVtbl->Read (self_ptr, buffer, to_read, &bytes_read);
|
||||||
|
if (!SUCCEEDED (hr))
|
||||||
|
return hr;
|
||||||
|
|
||||||
|
read_counter.QuadPart += bytes_read;
|
||||||
|
|
||||||
|
if (bytes_read == 0)
|
||||||
|
break;
|
||||||
|
|
||||||
|
bytes_index = 0;
|
||||||
|
|
||||||
|
while (bytes_index < bytes_read)
|
||||||
|
{
|
||||||
|
/* Because MS SDK has a function IStream_Write() with 3 arguments */
|
||||||
|
hr = output_stream->lpVtbl->Write (output_stream, &buffer[bytes_index], bytes_read - bytes_index, &bytes_written);
|
||||||
|
if (!SUCCEEDED (hr))
|
||||||
|
return hr;
|
||||||
|
|
||||||
|
if (bytes_written == 0)
|
||||||
|
return __HRESULT_FROM_WIN32 (ERROR_WRITE_FAULT);
|
||||||
|
|
||||||
|
bytes_index += bytes_written;
|
||||||
|
written_counter.QuadPart += bytes_written;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (output_bytes_read)
|
||||||
|
output_bytes_read->QuadPart = read_counter.QuadPart;
|
||||||
|
if (output_bytes_written)
|
||||||
|
output_bytes_written->QuadPart = written_counter.QuadPart;
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_commit (IStream *self_ptr,
|
||||||
|
DWORD commit_flags)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
|
||||||
|
if (!FlushFileBuffers (self->file_handle))
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_revert (IStream *self_ptr)
|
||||||
|
{
|
||||||
|
return E_NOTIMPL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_lock_region (IStream *self_ptr,
|
||||||
|
ULARGE_INTEGER lock_offset,
|
||||||
|
ULARGE_INTEGER lock_bytes,
|
||||||
|
DWORD lock_type)
|
||||||
|
{
|
||||||
|
return STG_E_INVALIDFUNCTION;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_unlock_region (IStream *self_ptr,
|
||||||
|
ULARGE_INTEGER lock_offset,
|
||||||
|
ULARGE_INTEGER lock_bytes,
|
||||||
|
DWORD lock_type)
|
||||||
|
{
|
||||||
|
return STG_E_INVALIDFUNCTION;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_stat (IStream *self_ptr,
|
||||||
|
STATSTG *output_stat,
|
||||||
|
DWORD flags)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *self = (GWin32FileSyncStream *) self_ptr;
|
||||||
|
BOOL get_name = FALSE;
|
||||||
|
FILE_BASIC_INFO bi;
|
||||||
|
FILE_STANDARD_INFO si;
|
||||||
|
|
||||||
|
if (output_stat == NULL)
|
||||||
|
return STG_E_INVALIDPOINTER;
|
||||||
|
|
||||||
|
switch (flags)
|
||||||
|
{
|
||||||
|
case STATFLAG_DEFAULT:
|
||||||
|
get_name = TRUE;
|
||||||
|
break;
|
||||||
|
case STATFLAG_NONAME:
|
||||||
|
get_name = FALSE;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
return STG_E_INVALIDFLAG;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!GetFileInformationByHandleEx (self->file_handle, FileBasicInfo, &bi, sizeof (bi)) ||
|
||||||
|
!GetFileInformationByHandleEx (self->file_handle, FileStandardInfo, &si, sizeof (si)))
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
output_stat->type = STGTY_STREAM;
|
||||||
|
output_stat->mtime.dwLowDateTime = bi.LastWriteTime.LowPart;
|
||||||
|
output_stat->mtime.dwHighDateTime = bi.LastWriteTime.HighPart;
|
||||||
|
output_stat->ctime.dwLowDateTime = bi.CreationTime.LowPart;
|
||||||
|
output_stat->ctime.dwHighDateTime = bi.CreationTime.HighPart;
|
||||||
|
output_stat->atime.dwLowDateTime = bi.LastAccessTime.LowPart;
|
||||||
|
output_stat->atime.dwHighDateTime = bi.LastAccessTime.HighPart;
|
||||||
|
output_stat->grfLocksSupported = 0;
|
||||||
|
memset (&output_stat->clsid, 0, sizeof (CLSID));
|
||||||
|
output_stat->grfStateBits = 0;
|
||||||
|
output_stat->reserved = 0;
|
||||||
|
output_stat->cbSize.QuadPart = si.EndOfFile.QuadPart;
|
||||||
|
output_stat->grfMode = self->stgm_mode;
|
||||||
|
|
||||||
|
if (get_name)
|
||||||
|
{
|
||||||
|
DWORD tries;
|
||||||
|
wchar_t *buffer;
|
||||||
|
|
||||||
|
/* Nothing in the documentation guarantees that the name
|
||||||
|
* won't change between two invocations (one - to get the
|
||||||
|
* buffer size, the other - to fill the buffer).
|
||||||
|
* Re-try up to 5 times in case the required buffer size
|
||||||
|
* doesn't match.
|
||||||
|
*/
|
||||||
|
for (tries = 5; tries > 0; tries--)
|
||||||
|
{
|
||||||
|
DWORD buffer_size;
|
||||||
|
DWORD buffer_size2;
|
||||||
|
DWORD error;
|
||||||
|
|
||||||
|
buffer_size = GetFinalPathNameByHandleW (self->file_handle, NULL, 0, 0);
|
||||||
|
|
||||||
|
if (buffer_size == 0)
|
||||||
|
{
|
||||||
|
DWORD error = GetLastError ();
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
buffer = CoTaskMemAlloc (buffer_size);
|
||||||
|
buffer[buffer_size - 1] = 0;
|
||||||
|
buffer_size2 = GetFinalPathNameByHandleW (self->file_handle, buffer, buffer_size, 0);
|
||||||
|
|
||||||
|
if (buffer_size2 < buffer_size)
|
||||||
|
break;
|
||||||
|
|
||||||
|
error = GetLastError ();
|
||||||
|
CoTaskMemFree (buffer);
|
||||||
|
if (buffer_size2 == 0)
|
||||||
|
return __HRESULT_FROM_WIN32 (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tries == 0)
|
||||||
|
return __HRESULT_FROM_WIN32 (ERROR_BAD_LENGTH);
|
||||||
|
|
||||||
|
output_stat->pwcsName = buffer;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
output_stat->pwcsName = NULL;
|
||||||
|
|
||||||
|
return S_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static HRESULT STDMETHODCALLTYPE
|
||||||
|
_file_sync_stream_clone (IStream *self_ptr,
|
||||||
|
IStream **output_clone_ptr)
|
||||||
|
{
|
||||||
|
return E_NOTIMPL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static IStreamVtbl _file_sync_stream_vtbl = {
|
||||||
|
_file_sync_stream_query_interface,
|
||||||
|
_file_sync_stream_add_ref,
|
||||||
|
_file_sync_stream_release,
|
||||||
|
_file_sync_stream_read,
|
||||||
|
_file_sync_stream_write,
|
||||||
|
_file_sync_stream_seek,
|
||||||
|
_file_sync_stream_set_size,
|
||||||
|
_file_sync_stream_copy_to,
|
||||||
|
_file_sync_stream_commit,
|
||||||
|
_file_sync_stream_revert,
|
||||||
|
_file_sync_stream_lock_region,
|
||||||
|
_file_sync_stream_unlock_region,
|
||||||
|
_file_sync_stream_stat,
|
||||||
|
_file_sync_stream_clone,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void
|
||||||
|
_file_sync_stream_free (GWin32FileSyncStream *self)
|
||||||
|
{
|
||||||
|
if (self->owns_handle)
|
||||||
|
CloseHandle (self->file_handle);
|
||||||
|
|
||||||
|
g_free (self);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* g_win32_file_sync_stream_new:
|
||||||
|
* @handle: a Win32 HANDLE for a file.
|
||||||
|
* @owns_handle: %TRUE if newly-created stream owns the handle
|
||||||
|
* (and closes it when destroyed)
|
||||||
|
* @stgm_mode: a combination of [STGM constants](https://docs.microsoft.com/en-us/windows/win32/stg/stgm-constants)
|
||||||
|
* that specify the mode with which the stream
|
||||||
|
* is opened.
|
||||||
|
* @output_hresult: (out) (optional): a HRESULT from the internal COM calls.
|
||||||
|
* Will be `S_OK` on success.
|
||||||
|
*
|
||||||
|
* Creates an IStream object backed by a HANDLE.
|
||||||
|
*
|
||||||
|
* @stgm_mode should match the mode of the @handle, otherwise the stream might
|
||||||
|
* attempt to perform operations that the @handle does not allow. The implementation
|
||||||
|
* itself ignores these flags completely, they are only used to report
|
||||||
|
* the mode of the stream to third parties.
|
||||||
|
*
|
||||||
|
* The stream only does synchronous access and will never return `E_PENDING` on I/O.
|
||||||
|
*
|
||||||
|
* The returned stream object should be treated just like any other
|
||||||
|
* COM object, and released via `IUnknown_Release()`.
|
||||||
|
* its elements have been unreffed with g_object_unref().
|
||||||
|
*
|
||||||
|
* Returns: (nullable) (transfer full): a new IStream object on success, %NULL on failure.
|
||||||
|
**/
|
||||||
|
IStream *
|
||||||
|
g_win32_file_sync_stream_new (HANDLE file_handle,
|
||||||
|
gboolean owns_handle,
|
||||||
|
DWORD stgm_mode,
|
||||||
|
HRESULT *output_hresult)
|
||||||
|
{
|
||||||
|
GWin32FileSyncStream *new_stream;
|
||||||
|
IStream *result;
|
||||||
|
HRESULT hr;
|
||||||
|
|
||||||
|
new_stream = g_new0 (GWin32FileSyncStream, 1);
|
||||||
|
new_stream->self.lpVtbl = &_file_sync_stream_vtbl;
|
||||||
|
|
||||||
|
hr = IUnknown_QueryInterface ((IUnknown *) new_stream, &IID_IStream, (void **) &result);
|
||||||
|
if (!SUCCEEDED (hr))
|
||||||
|
{
|
||||||
|
g_free (new_stream);
|
||||||
|
|
||||||
|
if (output_hresult)
|
||||||
|
*output_hresult = hr;
|
||||||
|
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
new_stream->stgm_mode = stgm_mode;
|
||||||
|
new_stream->file_handle = file_handle;
|
||||||
|
new_stream->owns_handle = owns_handle;
|
||||||
|
|
||||||
|
if (output_hresult)
|
||||||
|
*output_hresult = S_OK;
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
44
gio/gwin32file-sync-stream.h
Executable file
44
gio/gwin32file-sync-stream.h
Executable file
@ -0,0 +1,44 @@
|
|||||||
|
/* GIO - GLib Input, Output and Streaming Library
|
||||||
|
*
|
||||||
|
* Copyright (C) 2020 Руслан Ижбулатов <lrn1986@gmail.com>
|
||||||
|
*
|
||||||
|
* This library is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU Lesser General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2.1 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This library 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
|
||||||
|
* Lesser General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU Lesser General
|
||||||
|
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
#ifndef __G_WIN32_FILE_SYNC_STREAM_H__
|
||||||
|
#define __G_WIN32_FILE_SYNC_STREAM_H__
|
||||||
|
|
||||||
|
#include <gio/gio.h>
|
||||||
|
|
||||||
|
#ifdef G_PLATFORM_WIN32
|
||||||
|
|
||||||
|
typedef struct _GWin32FileSyncStream GWin32FileSyncStream;
|
||||||
|
|
||||||
|
struct _GWin32FileSyncStream
|
||||||
|
{
|
||||||
|
IStream self;
|
||||||
|
ULONG ref_count;
|
||||||
|
HANDLE file_handle;
|
||||||
|
gboolean owns_handle;
|
||||||
|
DWORD stgm_mode;
|
||||||
|
};
|
||||||
|
|
||||||
|
IStream *g_win32_file_sync_stream_new (HANDLE file_handle,
|
||||||
|
gboolean owns_handle,
|
||||||
|
DWORD stgm_mode,
|
||||||
|
HRESULT *output_hresult);
|
||||||
|
|
||||||
|
#endif /* G_PLATFORM_WIN32 */
|
||||||
|
|
||||||
|
#endif /* __G_WIN32_FILE_SYNC_STREAM_H__ */
|
||||||
@ -436,6 +436,7 @@ else
|
|||||||
'gwin32volumemonitor.c',
|
'gwin32volumemonitor.c',
|
||||||
'gwin32inputstream.c',
|
'gwin32inputstream.c',
|
||||||
'gwin32outputstream.c',
|
'gwin32outputstream.c',
|
||||||
|
'gwin32file-sync-stream.c',
|
||||||
'gwin32networkmonitor.c',
|
'gwin32networkmonitor.c',
|
||||||
'gwin32networkmonitor.h',
|
'gwin32networkmonitor.h',
|
||||||
'gwin32notificationbackend.c',
|
'gwin32notificationbackend.c',
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user