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interface: add an interface struct

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The interface struct has the type,version and methods of the
interface.
Make spa interfaces extend from spa_interface and make a
separate structure for the methods.
Pass a generic void* as the first argument of methods, like
we don in PipeWire.
Bundle the methods + implementation in a versioned inteface
and use that to invoke methods. This way we can do version
checks on the methods.
Make resource and proxy interfaces that we can can call. We
can then make the core interfaces independent on proxy/resource and
hide them in the lower layers.
Add add_listener method to methods of core interfaces, just
like SPA.
This commit is contained in:
Wim Taymans 2019-05-20 16:11:23 +02:00
parent eb6481efb3
commit ff946e3d4b
85 changed files with 3051 additions and 3000 deletions
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21
spa/include/spa/support/dbus.h
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@ -31,6 +31,9 @@ extern "C" {
#include <spa/support/loop.h>
#define SPA_VERSION_DBUS 0
struct spa_dbus { struct spa_interface iface; };
enum spa_dbus_type {
SPA_DBUS_TYPE_SESSION, /**< The login session bus */
SPA_DBUS_TYPE_SYSTEM, /**< The systemwide bus */
@ -58,10 +61,8 @@ struct spa_dbus_connection {
#define spa_dbus_connection_get(c) (c)->get((c))
#define spa_dbus_connection_destroy(c) (c)->destroy((c))
struct spa_dbus {
/* the version of this structure. This can be used to expand this
* structure in the future */
#define SPA_VERSION_DBUS 0
struct spa_dbus_methods {
#define SPA_VERSION_DBUS_METHODS 0
uint32_t version;
/**
@ -76,11 +77,19 @@ struct spa_dbus {
* \param error location for the DBusError
* \return a new dbus connection wrapper or NULL on error
*/
struct spa_dbus_connection * (*get_connection) (struct spa_dbus *dbus,
struct spa_dbus_connection * (*get_connection) (void *object,
enum spa_dbus_type type);
};
#define spa_dbus_get_connection(d,...) (d)->get_connection((d),__VA_ARGS__)
static inline struct spa_dbus_connection *
spa_dbus_get_connection(struct spa_dbus *dbus, enum spa_dbus_type type)
{
struct spa_dbus_connection *res = NULL;
spa_interface_call_res(&dbus->iface,
struct spa_dbus_methods, res,
get_connection, 0, type);
return res;
}
#ifdef __cplusplus
} /* extern "C" */