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-rw-r--r--src/lib/upnp/Callback.hxx46
-rw-r--r--src/lib/upnp/Discovery.cxx12
-rw-r--r--src/lib/upnp/Discovery.hxx6
-rw-r--r--src/lib/upnp/upnpplib.cxx15
-rw-r--r--src/lib/upnp/upnpplib.hxx11
5 files changed, 64 insertions, 26 deletions
diff --git a/src/lib/upnp/Callback.hxx b/src/lib/upnp/Callback.hxx
new file mode 100644
index 000000000..85daf0a7e
--- /dev/null
+++ b/src/lib/upnp/Callback.hxx
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2003-2014 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.
+ */
+
+#ifndef MPD_UPNP_CALLBACK_HXX
+#define MPD_UPNP_CALLBACK_HXX
+
+#include <upnp/upnp.h>
+
+/**
+ * A class that is supposed to be used for libupnp asynchronous
+ * callbacks.
+ */
+class UpnpCallback {
+public:
+ /**
+ * Pass this value as "cookie" pointer to libupnp asynchronous
+ * functions.
+ */
+ void *GetUpnpCookie() {
+ return this;
+ }
+
+ static UpnpCallback &FromUpnpCookie(void *cookie) {
+ return *(UpnpCallback *)cookie;
+ }
+
+ virtual int Invoke(Upnp_EventType et, void *evp) = 0;
+};
+
+#endif
diff --git a/src/lib/upnp/Discovery.cxx b/src/lib/upnp/Discovery.cxx
index da32372ba..ce512bdde 100644
--- a/src/lib/upnp/Discovery.cxx
+++ b/src/lib/upnp/Discovery.cxx
@@ -184,8 +184,8 @@ UPnPDeviceDirectory::OnByeBye(Upnp_Discovery *disco)
// thread context.
// Example: ContentDirectories appearing and disappearing from the network
// We queue a task for our worker thread(s)
-inline int
-UPnPDeviceDirectory::cluCallBack(Upnp_EventType et, void *evp)
+int
+UPnPDeviceDirectory::Invoke(Upnp_EventType et, void *evp)
{
switch (et) {
case UPNP_DISCOVERY_SEARCH_RESULT:
@@ -254,10 +254,6 @@ UPnPDeviceDirectory::Start(Error &error)
return false;
}
- lib->SetHandler([this](Upnp_EventType type, void *event){
- cluCallBack(type, event);
- });
-
return search(error);
}
@@ -271,7 +267,7 @@ UPnPDeviceDirectory::search(Error &error)
// We search both for device and service just in case.
int code = UpnpSearchAsync(lib->getclh(), m_searchTimeout,
- ContentDirectorySType, lib);
+ ContentDirectorySType, GetUpnpCookie());
if (code != UPNP_E_SUCCESS) {
error.Format(upnp_domain, code,
"UpnpSearchAsync() failed: %s",
@@ -280,7 +276,7 @@ UPnPDeviceDirectory::search(Error &error)
}
code = UpnpSearchAsync(lib->getclh(), m_searchTimeout,
- MediaServerDType, lib);
+ MediaServerDType, GetUpnpCookie());
if (code != UPNP_E_SUCCESS) {
error.Format(upnp_domain, code,
"UpnpSearchAsync() failed: %s",
diff --git a/src/lib/upnp/Discovery.hxx b/src/lib/upnp/Discovery.hxx
index 3208f8727..1a126edfd 100644
--- a/src/lib/upnp/Discovery.hxx
+++ b/src/lib/upnp/Discovery.hxx
@@ -20,6 +20,7 @@
#ifndef _UPNPPDISC_H_X_INCLUDED_
#define _UPNPPDISC_H_X_INCLUDED_
+#include "Callback.hxx"
#include "Device.hxx"
#include "WorkQueue.hxx"
#include "thread/Mutex.hxx"
@@ -46,7 +47,7 @@ public:
* We are only interested in MediaServers with a ContentDirectory service
* for now, but this could be made more general, by removing the filtering.
*/
-class UPnPDeviceDirectory {
+class UPnPDeviceDirectory final : UpnpCallback {
/**
* Each appropriate discovery event (executing in a libupnp thread
* context) queues the following task object for processing by the
@@ -154,6 +155,9 @@ private:
int OnAlive(Upnp_Discovery *disco);
int OnByeBye(Upnp_Discovery *disco);
int cluCallBack(Upnp_EventType et, void *evp);
+
+ /* virtual methods from class UpnpCallback */
+ virtual int Invoke(Upnp_EventType et, void *evp) override;
};
diff --git a/src/lib/upnp/upnpplib.cxx b/src/lib/upnp/upnpplib.cxx
index 475447dee..452c033d5 100644
--- a/src/lib/upnp/upnpplib.cxx
+++ b/src/lib/upnp/upnpplib.cxx
@@ -19,6 +19,7 @@
#include "config.h"
#include "upnpplib.hxx"
+#include "Callback.hxx"
#include "Domain.hxx"
#include "Log.hxx"
@@ -37,7 +38,7 @@ LibUPnP::LibUPnP()
UpnpSetMaxContentLength(2000*1024);
- code = UpnpRegisterClient(o_callback, (void *)this, &m_clh);
+ code = UpnpRegisterClient(o_callback, nullptr, &m_clh);
if (code != UPNP_E_SUCCESS) {
init_error.Format(upnp_domain, code,
"UpnpRegisterClient() failed: %s",
@@ -52,12 +53,14 @@ LibUPnP::LibUPnP()
int
LibUPnP::o_callback(Upnp_EventType et, void* evp, void* cookie)
{
- LibUPnP *ulib = (LibUPnP *)cookie;
+ 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;
- if (ulib->handler)
- ulib->handler(et, evp);
-
- return UPNP_E_SUCCESS;
+ UpnpCallback &callback = UpnpCallback::FromUpnpCookie(cookie);
+ return callback.Invoke(et, evp);
}
LibUPnP::~LibUPnP()
diff --git a/src/lib/upnp/upnpplib.hxx b/src/lib/upnp/upnpplib.hxx
index 6759aa16d..cd1762ec4 100644
--- a/src/lib/upnp/upnpplib.hxx
+++ b/src/lib/upnp/upnpplib.hxx
@@ -24,17 +24,11 @@
#include <upnp/upnp.h>
-#include <functional>
-
/** Our link to libupnp. Initialize and keep the handle around */
class LibUPnP {
- typedef std::function<void(Upnp_EventType type, void *event)> Handler;
-
Error init_error;
UpnpClient_Handle m_clh;
- Handler handler;
-
static int o_callback(Upnp_EventType, void *, void *);
public:
@@ -56,11 +50,6 @@ public:
return init_error;
}
- template<typename T>
- void SetHandler(T &&_handler) {
- handler = std::forward<T>(_handler);
- }
-
UpnpClient_Handle getclh()
{
return m_clh;