---
name: "wayland_server_callback_t"
section: "3"
platform: "linux"
package: "waylandpp-dev"
version: "1.0.0-6+b2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/wayland_server_callback_t"
---

# wayland\_server\_callback\_t(3)

callback object

## NAME

wayland::server::callback\_t - callback object

## SYNOPSIS

`#include <wayland-server-protocol.hpp>`

Inherits wayland::server::resource\_t.

### Public Member Functions

void **done** (uint32\_t callback\_data, bool post=true)\
 done event  bool **proxy\_has\_object** () const\
 Check whether this wrapper actually wraps an object.  void **post\_no\_memory** () const\
 uint32\_t **get\_id** () const\
 client\_t **get\_client** () const\
 unsigned int **get\_version** () const\
 std::string **get\_class** ()\

### Static Public Attributes

static constexpr std::uint32\_t **done\_since\_version** = 1\
 Minimum protocol version required for the **done** function.

## Detailed Description

callback object

Clients can handle the 'done' event to get notified when the related request is done.

Definition at line **219** of file **wayland-server-protocol.hpp**.

## Member Function Documentation

### void callback\_t::done (uint32\_t callback\_data, bool post = `true`)

done event

**Parameters**

*callback\_data* request-specific data for the callback

Notify the client when the related request is done.

Definition at line **1617** of file **wayland-server-protocol.cpp**.

### std::string wayland::server::resource\_t::get\_class ()` [inherited]`

Retrieve the interface name (class) of a resource object.

**Returns**

Interface name of the resource object.

### client\_t wayland::server::resource\_t::get\_client () const` [inherited]`

Get the associated client

**Returns**

the client that owns the resource.

### uint32\_t wayland::server::resource\_t::get\_id () const` [inherited]`

Get the internal ID of the resource

**Returns**

the internal ID of the resource

### unsigned int wayland::server::resource\_t::get\_version () const` [inherited]`

Get interface version

**Returns**

Interface version this resource has been constructed with.

### void wayland::server::resource\_t::post\_no\_memory () const` [inherited]`

Post 'not enough memory' error to the client

If the compositor has not enough memory to fulfill a certail request of the client, this function can be called to notify the client of this circumstance.

### bool wayland::server::resource\_t::proxy\_has\_object () const` [inherited]`

Check whether this wrapper actually wraps an object.

**Returns**

true if there is an underlying object, false if this wrapper is empty

## Member Data Documentation

### constexpr std::uint32\_t wayland::server::callback\_t::done\_since\_version = 1` [static]`, ` [constexpr]`

Minimum protocol version required for the **done** function.

Definition at line **254** of file **wayland-server-protocol.hpp**.

## Author

Generated automatically by Doxygen for Wayland++ from the source code.