* 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, write to the
- * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
* SECTION:gasynchelper
* @short_description: Asynchronous Helper Functions
* @include: gio/gio.h
- * @see_also: #GAsyncReady
+ * @see_also: #GAsyncResult
*
* Provides helper functions for asynchronous operations.
*
**/
-/*************************************************************************
- * fd source *
- ************************************************************************/
-
-typedef struct
-{
- GSource source;
- GPollFD pollfd;
-} FDSource;
-
-static gboolean
-fd_source_prepare (GSource *source,
- gint *timeout)
-{
- *timeout = -1;
- return FALSE;
-}
-
-static gboolean
-fd_source_check (GSource *source)
-{
- FDSource *fd_source = (FDSource *)source;
-
- return fd_source->pollfd.revents != 0;
-}
-
-static gboolean
-fd_source_dispatch (GSource *source,
- GSourceFunc callback,
- gpointer user_data)
-
-{
- GFDSourceFunc func = (GFDSourceFunc)callback;
- FDSource *fd_source = (FDSource *)source;
-
- g_warn_if_fail (func != NULL);
-
- return (*func) (fd_source->pollfd.fd, fd_source->pollfd.revents, user_data);
-}
-
-static void
-fd_source_finalize (GSource *source)
+#ifdef G_OS_WIN32
+gboolean
+_g_win32_overlap_wait_result (HANDLE hfile,
+ OVERLAPPED *overlap,
+ DWORD *transferred,
+ GCancellable *cancellable)
{
-}
+ GPollFD pollfd[2];
+ gboolean result = FALSE;
+ gint num, npoll;
-static gboolean
-fd_source_closure_callback (int fd,
- GIOCondition condition,
- gpointer data)
-{
- GClosure *closure = data;
+ pollfd[0].fd = (gint)overlap->hEvent;
+ pollfd[0].events = G_IO_IN;
+ num = 1;
- GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
- GValue result_value = G_VALUE_INIT;
- gboolean result;
+ if (g_cancellable_make_pollfd (cancellable, &pollfd[1]))
+ num++;
- g_value_init (&result_value, G_TYPE_BOOLEAN);
+loop:
+ npoll = g_poll (pollfd, num, -1);
+ if (npoll <= 0)
+ /* error out, should never happen */
+ goto end;
- g_value_init (¶ms[0], G_TYPE_INT);
- g_value_set_int (¶ms[0], fd);
-
- g_value_init (¶ms[1], G_TYPE_IO_CONDITION);
- g_value_set_flags (¶ms[1], condition);
+ if (g_cancellable_is_cancelled (cancellable))
+ {
+ /* CancelIO only cancels pending operations issued by the
+ * current thread and since we're doing only sync operations,
+ * this is safe.... */
+ /* CancelIoEx is only Vista+. Since we have only one overlap
+ * operaton on this thread, we can just use: */
+ result = CancelIo (hfile);
+ g_warn_if_fail (result);
+ }
- g_closure_invoke (closure, &result_value, 2, params, NULL);
+ result = GetOverlappedResult (overlap->hEvent, overlap, transferred, FALSE);
+ if (result == FALSE &&
+ GetLastError () == ERROR_IO_INCOMPLETE &&
+ !g_cancellable_is_cancelled (cancellable))
+ goto loop;
- result = g_value_get_boolean (&result_value);
- g_value_unset (&result_value);
- g_value_unset (¶ms[0]);
- g_value_unset (¶ms[1]);
+end:
+ if (num > 1)
+ g_cancellable_release_fd (cancellable);
return result;
}
-
-static void
-fd_source_closure_marshal (GClosure *closure,
- GValue *return_value,
- guint n_param_values,
- const GValue *param_values,
- gpointer invocation_hint,
- gpointer marshal_data)
-{
- GFDSourceFunc callback;
- GCClosure *cc = (GCClosure*) closure;
- gboolean v_return;
-
- g_return_if_fail (return_value != NULL);
- g_return_if_fail (n_param_values == 0);
-
- callback = (GFDSourceFunc) (marshal_data ? marshal_data : cc->callback);
-
- v_return = callback (g_value_get_int (param_values),
- g_value_get_flags (param_values + 1),
- closure->data);
-
- g_value_set_boolean (return_value, v_return);
-}
-
-static GSourceFuncs fd_source_funcs = {
- fd_source_prepare,
- fd_source_check,
- fd_source_dispatch,
- fd_source_finalize,
- (GSourceFunc)fd_source_closure_callback,
- (GSourceDummyMarshal)fd_source_closure_marshal,
-};
-
-GSource *
-_g_fd_source_new (int fd,
- gushort events,
- GCancellable *cancellable)
-{
- GSource *source;
- FDSource *fd_source;
-
- source = g_source_new (&fd_source_funcs, sizeof (FDSource));
- fd_source = (FDSource *)source;
-
- fd_source->pollfd.fd = fd;
- fd_source->pollfd.events = events;
- g_source_add_poll (source, &fd_source->pollfd);
-
- if (cancellable)
- {
- GSource *cancellable_source = g_cancellable_source_new (cancellable);
-
- g_source_set_dummy_callback (cancellable_source);
- g_source_add_child_source (source, cancellable_source);
- g_source_unref (cancellable_source);
- }
-
- return source;
-}
+#endif