PipeWire: spa/support/dbus.h Source File

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dbus.h
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1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_DBUS_H
6#define SPA_DBUS_H
7
8#ifdef __cplusplus
9extern "C" {
10#endif
11
12#include <spa/support/loop.h>
13
23#define SPA_TYPE_INTERFACE_DBus SPA_TYPE_INFO_INTERFACE_BASE "DBus"
24
25#define SPA_VERSION_DBUS 0
26struct spa_dbus { struct spa_interface iface; };
27
28enum spa_dbus_type {
29 SPA_DBUS_TYPE_SESSION,
30 SPA_DBUS_TYPE_SYSTEM,
31 SPA_DBUS_TYPE_STARTER
32};
33
34#define SPA_DBUS_CONNECTION_EVENT_DESTROY 0
35#define SPA_DBUS_CONNECTION_EVENT_DISCONNECTED 1
36#define SPA_DBUS_CONNECTION_EVENT_NUM 2
37
38struct spa_dbus_connection_events {
39#define SPA_VERSION_DBUS_CONNECTION_EVENTS 0
40 uint32_t version;
41
42 /* a connection is destroyed */
43 void (*destroy) (void *data);
44
45 /* a connection disconnected */
46 void (*disconnected) (void *data);
47};
48
49struct spa_dbus_connection {
50#define SPA_VERSION_DBUS_CONNECTION 1
51 uint32_t version;
63 void *(*get) (struct spa_dbus_connection *conn);
69 void (*destroy) (struct spa_dbus_connection *conn);
70
76 void (*add_listener) (struct spa_dbus_connection *conn,
77 struct spa_hook *listener,
78 const struct spa_dbus_connection_events *events,
79 void *data);
80};
81
82#define spa_dbus_connection_call(c,method,vers,...) \
83({ \
84 if (SPA_LIKELY(SPA_CALLBACK_CHECK(c,method,vers))) \
85 c->method((c), ## __VA_ARGS__); \
86})
87
88#define spa_dbus_connection_call_vp(c,method,vers,...) \
89({ \
90 void *_res = NULL; \
91 if (SPA_LIKELY(SPA_CALLBACK_CHECK(c,method,vers))) \
92 _res = c->method((c), ## __VA_ARGS__); \
93 _res; \
94})
95
98#define spa_dbus_connection_get(c) spa_dbus_connection_call_vp(c,get,0)
101#define spa_dbus_connection_destroy(c) spa_dbus_connection_call(c,destroy,0)
104#define spa_dbus_connection_add_listener(c,...) spa_dbus_connection_call(c,add_listener,1,__VA_ARGS__)
105
106struct spa_dbus_methods {
107#define SPA_VERSION_DBUS_METHODS 0
108 uint32_t version;
109
122 struct spa_dbus_connection * (*get_connection) (void *object,
123 enum spa_dbus_type type);
124};
125
129static inline struct spa_dbus_connection *
130 spa_dbus_get_connection(struct spa_dbus *dbus, enum spa_dbus_type type)
131{
132 struct spa_dbus_connection *res = NULL;
133 spa_interface_call_res(&dbus->iface,
134 struct spa_dbus_methods, res,
135 get_connection, 0, type);
136 return res;
137}
138
143#ifdef __cplusplus
144} /* extern "C" */
145#endif
146
147#endif /* SPA_DBUS_H */
spa_dbus_type
spa_dbus_type
Definition dbus.h:35
spa_dbus_get_connection
static struct spa_dbus_connection * spa_dbus_get_connection(struct spa_dbus *dbus, enum spa_dbus_type type)
Get a new connection wrapper for the given bus type.
Definition dbus.h:143
SPA_DBUS_TYPE_SESSION
@ SPA_DBUS_TYPE_SESSION
The login session bus.
Definition dbus.h:36
SPA_DBUS_TYPE_STARTER
@ SPA_DBUS_TYPE_STARTER
The bus that started us, if any.
Definition dbus.h:38
SPA_DBUS_TYPE_SYSTEM
@ SPA_DBUS_TYPE_SYSTEM
The systemwide bus.
Definition dbus.h:37
spa_interface_call_res
#define spa_interface_call_res(iface, method_type, res, method, vers,...)
Invoke method named method in the callbacks on the given interface object.
Definition hook.h:251
loop.h
spa/support/loop.h
spa_dbus_connection_events
Definition dbus.h:48
spa_dbus_connection_events::destroy
void(* destroy)(void *data)
Definition dbus.h:54
spa_dbus_connection_events::version
uint32_t version
Definition dbus.h:51
spa_dbus_connection_events::disconnected
void(* disconnected)(void *data)
Definition dbus.h:57
spa_dbus_connection
Definition dbus.h:60
spa_dbus_connection::destroy
void(* destroy)(struct spa_dbus_connection *conn)
Destroy a dbus connection wrapper.
Definition dbus.h:81
spa_dbus_connection::add_listener
void(* add_listener)(struct spa_dbus_connection *conn, struct spa_hook *listener, const struct spa_dbus_connection_events *events, void *data)
Add a listener for events.
Definition dbus.h:88
spa_dbus_methods
Definition dbus.h:118
spa_dbus_methods::version
uint32_t version
Definition dbus.h:121
spa_dbus
Definition dbus.h:33
spa_dbus::iface
struct spa_interface iface
Definition dbus.h:33
spa_hook
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:350
spa_interface
Definition hook.h:138