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/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ClientInit.hxx"
#include "Init.hxx"
#include "Callback.hxx"
#include "thread/Mutex.hxx"
#include "util/RuntimeError.hxx"
#include <upnptools.h>
#include <cassert>
static Mutex upnp_client_init_mutex;
static unsigned upnp_client_ref;
static UpnpClient_Handle upnp_client_handle;
static int
UpnpClientCallback(Upnp_EventType et,
const void *evp,
void *cookie) noexcept
{
if (cookie == nullptr)
/* this is the cookie passed to UpnpRegisterClient();
but can this ever happen? Will libupnp ever invoke
the registered callback without that cookie? */
return UPNP_E_SUCCESS;
UpnpCallback &callback = UpnpCallback::FromUpnpCookie(cookie);
return callback.Invoke(et, evp);
}
static void
DoInit()
{
auto code = UpnpRegisterClient(UpnpClientCallback, nullptr,
&upnp_client_handle);
if (code != UPNP_E_SUCCESS)
throw FormatRuntimeError("UpnpRegisterClient() failed: %s",
UpnpGetErrorMessage(code));
}
UpnpClient_Handle
UpnpClientGlobalInit(const char* iface)
{
UpnpGlobalInit(iface);
try {
const std::scoped_lock<Mutex> protect(upnp_client_init_mutex);
if (upnp_client_ref == 0)
DoInit();
} catch (...) {
UpnpGlobalFinish();
throw;
}
++upnp_client_ref;
return upnp_client_handle;
}
void
UpnpClientGlobalFinish() noexcept
{
{
const std::scoped_lock<Mutex> protect(upnp_client_init_mutex);
assert(upnp_client_ref > 0);
if (--upnp_client_ref == 0)
UpnpUnRegisterClient(upnp_client_handle);
}
UpnpGlobalFinish();
}