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/***
This file is part of PulseAudio.
Copyright 2009 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <pulse/xmalloc.h>
#include <pulse/i18n.h>
#include <pulsecore/core-error.h>
#include <pulsecore/core-util.h>
#include <pulsecore/shared.h>
#include <pulsecore/dbus-shared.h>
#include "reserve.h"
#include "reserve-wrap.h"
struct pa_reserve_wrapper {
PA_REFCNT_DECLARE;
pa_core *core;
pa_dbus_connection *connection;
pa_hook hook;
struct rd_device *device;
char *shared_name;
};
static void reserve_wrapper_free(pa_reserve_wrapper *r) {
pa_assert(r);
if (r->device)
rd_release(r->device);
pa_hook_done(&r->hook);
if (r->connection)
pa_dbus_connection_unref(r->connection);
if (r->shared_name) {
pa_assert_se(pa_shared_remove(r->core, r->shared_name) >= 0);
pa_xfree(r->shared_name);
}
pa_xfree(r);
}
static int request_cb(rd_device *d, int forced) {
pa_reserve_wrapper *r;
int k;
pa_assert(d);
pa_assert_se(r = rd_get_userdata(d));
pa_assert(PA_REFCNT_VALUE(r) >= 1);
PA_REFCNT_INC(r);
k = pa_hook_fire(&r->hook, PA_INT_TO_PTR(forced));
pa_log_debug("Device unlock has been requested and %s.", k < 0 ? "failed" : "succeeded");
pa_reserve_wrapper_unref(r);
return k < 0 ? -1 : 1;
}
pa_reserve_wrapper* pa_reserve_wrapper_get(pa_core *c, const char *device_name) {
pa_reserve_wrapper *r;
DBusError error;
int k;
char *t;
dbus_error_init(&error);
pa_assert(c);
pa_assert(device_name);
t = pa_sprintf_malloc("reserve-wrapper@%s", device_name);
if ((r = pa_shared_get(c, t))) {
pa_xfree(t);
pa_assert(PA_REFCNT_VALUE(r) >= 1);
PA_REFCNT_INC(r);
return r;
}
r = pa_xnew0(pa_reserve_wrapper, 1);
PA_REFCNT_INIT(r);
r->core = c;
pa_hook_init(&r->hook, r);
r->shared_name = t;
pa_assert_se(pa_shared_set(c, r->shared_name, r) >= 0);
if (!(r->connection = pa_dbus_bus_get(c, DBUS_BUS_SESSION, &error)) || dbus_error_is_set(&error)) {
pa_log_warn("Unable to contact D-Bus session bus: %s: %s", error.name, error.message);
/* We don't treat this as error here because we want allow PA
* to run even when no session bus is available. */
return r;
}
if ((k = rd_acquire(
&r->device,
pa_dbus_connection_get(r->connection),
device_name,
_("PulseAudio Sound Server"),
0,
request_cb,
NULL)) < 0) {
if (k == -EBUSY) {
pa_log_error("Device '%s' already locked.", device_name);
goto fail;
} else {
pa_log_warn("Failed to acquire reservation lock on device '%s': %s", device_name, pa_cstrerror(-k));
return r;
}
}
pa_log_debug("Successfully acquired reservation lock on device '%s'", device_name);
rd_set_userdata(r->device, r);
return r;
fail:
dbus_error_free(&error);
reserve_wrapper_free(r);
return NULL;
}
void pa_reserve_wrapper_unref(pa_reserve_wrapper *r) {
pa_assert(r);
pa_assert(PA_REFCNT_VALUE(r) >= 1);
if (PA_REFCNT_DEC(r) > 0)
return;
reserve_wrapper_free(r);
}
pa_hook* pa_reserve_wrapper_hook(pa_reserve_wrapper *r) {
pa_assert(r);
pa_assert(PA_REFCNT_VALUE(r) >= 1);
return &r->hook;
}
void pa_reserve_wrapper_set_application_device_name(pa_reserve_wrapper *r, const char *name) {
pa_assert(r);
pa_assert(PA_REFCNT_VALUE(r) >= 1);
rd_set_application_device_name(r->device, name);
}
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