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b3b744aec6
Move it to the struct docs (although this documentation is private anyway). Signed-off-by: Philip Withnall <philip@tecnocode.co.uk> Helps: #3037
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include "config.h"
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#include "gasynchelper.h"
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/*< private >
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* GAsyncHelper:
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*
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* Provides helper functions for asynchronous operations.
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*/
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#ifdef G_OS_WIN32
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gboolean
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_g_win32_overlap_wait_result (HANDLE hfile,
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OVERLAPPED *overlap,
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DWORD *transferred,
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GCancellable *cancellable)
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{
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GPollFD pollfd[2];
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gboolean result = FALSE;
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gint num, npoll;
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#if GLIB_SIZEOF_VOID_P == 8
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pollfd[0].fd = (gint64)overlap->hEvent;
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#else
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pollfd[0].fd = (gint)overlap->hEvent;
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#endif
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pollfd[0].events = G_IO_IN;
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num = 1;
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if (g_cancellable_make_pollfd (cancellable, &pollfd[1]))
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num++;
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loop:
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npoll = g_poll (pollfd, num, -1);
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if (npoll <= 0)
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/* error out, should never happen */
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goto end;
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if (g_cancellable_is_cancelled (cancellable))
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{
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/* CancelIO only cancels pending operations issued by the
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* current thread and since we're doing only sync operations,
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* this is safe.... */
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/* CancelIoEx is only Vista+. Since we have only one overlap
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* operation on this thread, we can just use: */
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result = CancelIo (hfile);
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g_warn_if_fail (result);
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}
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result = GetOverlappedResult (overlap->hEvent, overlap, transferred, FALSE);
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if (result == FALSE &&
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GetLastError () == ERROR_IO_INCOMPLETE &&
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!g_cancellable_is_cancelled (cancellable))
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goto loop;
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end:
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if (num > 1)
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g_cancellable_release_fd (cancellable);
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return result;
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}
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#endif
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