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wl_signal(3) | Wayland | wl_signal(3) |
NAME¶
wl_signal - A source of a type of observable event.
SYNOPSIS¶
#include <wayland-server-core.h>
Public Member Functions¶
static void wl_signal_init (struct wl_signal
*signal)
static void wl_signal_add (struct wl_signal *signal, struct
wl_listener *listener)
static struct wl_listener * wl_signal_get (struct
wl_signal *signal, wl_notify_func_t notify)
static void wl_signal_emit (struct wl_signal *signal, void
*data)
Data Fields¶
struct wl_list listener_list
Detailed Description¶
A source of a type of observable event.
Signals are recognized points where significant events can be observed. Compositors as well as the server can provide signals. Observers are wl_listener's that are added through wl_signal_add. Signals are emitted using wl_signal_emit, which will invoke all listeners until that listener is removed by wl_list_remove() (or whenever the signal is destroyed).
See also
Member Function Documentation¶
static void wl_signal_add (struct wl_signal * signal, struct wl_listener * listener) [inline]¶
Add the specified listener to this signal.
Parameters
listener The listener to add
static void wl_signal_emit (struct wl_signal * signal, void * data) [inline]¶
Emits this signal, notifying all registered listeners.
Parameters
data The data that will be emitted with the signal
static struct wl_listener * wl_signal_get (struct wl_signal * signal, wl_notify_func_t notify) [inline]¶
Gets the listener struct for the specified callback.
Parameters
notify The listener that is the target of this search
Returns
static void wl_signal_init (struct wl_signal * signal) [inline]¶
Initialize a new wl_signal for use.
Parameters
Field Documentation¶
struct wl_list wl_signal::listener_list¶
Author¶
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Mon Aug 31 2020 | Version 1.18.0 |