*
* Note that disconnecting from this signal (or any signal) in a
* multi-threaded program is prone to race conditions. For instance
- * it is possible that a signal handler may be invoked even
- * <emphasis>after</emphasis> a call to
- * g_signal_handler_disconnect() for that handler has already
- * returned.
+ * it is possible that a signal handler may be invoked even after
+ * a call to g_signal_handler_disconnect() for that handler has
+ * already returned.
*
- * There is also a problem when cancellation happen
- * right before connecting to the signal. If this happens the
- * signal will unexpectedly not be emitted, and checking before
- * connecting to the signal leaves a race condition where this is
- * still happening.
+ * There is also a problem when cancellation happens right before
+ * connecting to the signal. If this happens the signal will
+ * unexpectedly not be emitted, and checking before connecting to
+ * the signal leaves a race condition where this is still happening.
*
* In order to make it safe and easy to connect handlers there
* are two helper functions: g_cancellable_connect() and
* like this.
*
* An example of how to us this:
- * |[
- * /<!-- -->* Make sure we don't do any unnecessary work if already cancelled *<!-- -->/
+ * |[<!-- language="C" -->
+ * // Make sure we don't do unnecessary work if already cancelled
* if (g_cancellable_set_error_if_cancelled (cancellable, error))
* return;
*
- * /<!-- -->* Set up all the data needed to be able to
- * * handle cancellation of the operation *<!-- -->/
+ * // Set up all the data needed to be able to handle cancellation
+ * // of the operation
* my_data = my_data_new (...);
*
* id = 0;
* G_CALLBACK (cancelled_handler)
* data, NULL);
*
- * /<!-- -->* cancellable operation here... *<!-- -->/
+ * // cancellable operation here...
*
* g_cancellable_disconnect (cancellable, id);
*
- * /<!-- -->* cancelled_handler is never called after this, it
- * * is now safe to free the data *<!-- -->/
+ * // cancelled_handler is never called after this, it is now safe
+ * // to free the data
* my_data_free (my_data);
* ]|
*
*
* Gets the top cancellable from the stack.
*
- * Returns: (transfer none): a #GCancellable from the top of the stack, or %NULL
- * if the stack is empty.
+ * Returns: (nullable) (transfer none): a #GCancellable from the top
+ * of the stack, or %NULL if the stack is empty.
**/
GCancellable *
g_cancellable_get_current (void)
*
* If cancellable is currently in use by any cancellable operation
* then the behavior of this function is undefined.
+ *
+ * Note that it is generally not a good idea to reuse an existing
+ * cancellable for more operations after it has been cancelled once,
+ * as this function might tempt you to do. The recommended practice
+ * is to drop the reference to a cancellable after cancelling it,
+ * and let it die with the outstanding async operations. You should
+ * create a fresh cancellable for further async operations.
**/
void
g_cancellable_reset (GCancellable *cancellable)
* For convenience, you can call this with a %NULL #GCancellable,
* in which case the source will never trigger.
*
- * Return value: (transfer full): the new #GSource.
+ * The new #GSource will hold a reference to the #GCancellable.
+ *
+ * Returns: (transfer full): the new #GSource.
*
* Since: 2.28
*/