src/pulsecore/dbus-shared.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006, 2009 Lennart Poettering
   5   Copyright 2006 Shams E. King
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2.1 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <pulse/xmalloc.h>
  28
  29 #include <pulsecore/shared.h>
  30
  31 #include "dbus-shared.h"
  32
  33 struct pa_dbus_connection {
  34     PA_REFCNT_DECLARE;
  35
  36     pa_dbus_wrap_connection *connection;
  37     pa_core *core;
  38     const char *property_name;
  39 };
  40
  41 static pa_dbus_connection* dbus_connection_new(pa_core *c, pa_dbus_wrap_connection *conn, const char *name) {
  42     pa_dbus_connection *pconn;
  43
  44     pconn = pa_xnew(pa_dbus_connection, 1);
  45     PA_REFCNT_INIT(pconn);
  46     pconn->core = c;
  47     pconn->property_name = name;
  48     pconn->connection = conn;
  49
  50     pa_shared_set(c, name, pconn);
  51
  52     return pconn;
  53 }
  54
  55 pa_dbus_connection* pa_dbus_bus_get(pa_core *c, DBusBusType type, DBusError *error) {
  56
  57     static const char *const prop_name[] = {
  58         [DBUS_BUS_SESSION] = "dbus-connection-session",
  59         [DBUS_BUS_SYSTEM] = "dbus-connection-system",
  60         [DBUS_BUS_STARTER] = "dbus-connection-starter"
  61     };
  62     pa_dbus_wrap_connection *conn;
  63     pa_dbus_connection *pconn;
  64
  65     pa_assert(type == DBUS_BUS_SYSTEM || type == DBUS_BUS_SESSION || type == DBUS_BUS_STARTER);
  66
  67     if ((pconn = pa_shared_get(c, prop_name[type])))
  68         return pa_dbus_connection_ref(pconn);
  69
  70     if (!(conn = pa_dbus_wrap_connection_new(c->mainloop, TRUE, type, error)))
  71         return NULL;
  72
  73     return dbus_connection_new(c, conn, prop_name[type]);
  74 }
  75
  76 DBusConnection* pa_dbus_connection_get(pa_dbus_connection *c){
  77     pa_assert(c);
  78     pa_assert(PA_REFCNT_VALUE(c) > 0);
  79     pa_assert(c->connection);
  80
  81     return pa_dbus_wrap_connection_get(c->connection);
  82 }
  83
  84 void pa_dbus_connection_unref(pa_dbus_connection *c) {
  85     pa_assert(c);
  86     pa_assert(PA_REFCNT_VALUE(c) > 0);
  87
  88     if (PA_REFCNT_DEC(c) > 0)
  89         return;
  90
  91     pa_dbus_wrap_connection_free(c->connection);
  92
  93     pa_shared_remove(c->core, c->property_name);
  94     pa_xfree(c);
  95 }
  96
  97 pa_dbus_connection* pa_dbus_connection_ref(pa_dbus_connection *c) {
  98     pa_assert(c);
  99     pa_assert(PA_REFCNT_VALUE(c) > 0);
 100
 101     PA_REFCNT_INC(c);
 102
 103     return c;
 104 }