db/upnp: move the LibUPnP instance to class UpnpDatabase

Delete the object when closing the database.

src/db/UpnpDatabasePlugin.cxx

@@ -159,14 +159,18 @@ UpnpDatabase::Configure(const config_param &, Error &)
 bool
 UpnpDatabase::Open(Error &error)
 {
-	m_lib = LibUPnP::getLibUPnP(error);
-	if (!m_lib)
+	m_lib = new LibUPnP();
+	if (!m_lib->ok()) {
+		error.Set(m_lib->GetInitError());
+		delete m_lib;
 		return false;
+	}
 
-	m_superdir = new UPnPDeviceDirectory();
+	m_superdir = new UPnPDeviceDirectory(m_lib);
 	if (!m_superdir->ok()) {
 		error.Set(m_superdir->GetError());
 		delete m_superdir;
+		delete m_lib;
 		return false;
 	}
 
@@ -182,7 +186,7 @@ UpnpDatabase::Close()
 {
 	delete m_root;
 	delete m_superdir;
-	// TBD decide what we do with the lib object
+	delete m_lib;
 }
 
 void
@@ -285,7 +289,7 @@ UpnpDatabase::SearchSongs(ContentDirectoryService* server,
 		return true;
 
 	std::set<std::string> searchcaps;
-	if (!server->getSearchCapabilities(searchcaps, error))
+	if (!server->getSearchCapabilities(m_lib->getclh(), searchcaps, error))
 		return false;
 
 	if (searchcaps.empty())
@@ -352,7 +356,9 @@ UpnpDatabase::SearchSongs(ContentDirectoryService* server,
 		}
 	}
 
-	return server->search(objid, cond.c_str(), dirbuf, error);
+	return server->search(m_lib->getclh(),
+			      objid, cond.c_str(), dirbuf,
+			      error);
 }
 
 static bool
@@ -433,7 +439,7 @@ UpnpDatabase::ReadNode(ContentDirectoryService *server,
 		       Error &error) const
 {
 	UPnPDirContent dirbuf;
-	if (!server->getMetadata(objid, dirbuf, error))
+	if (!server->getMetadata(m_lib->getclh(), objid, dirbuf, error))
 		return false;
 
 	if (dirbuf.objects.size() == 1) {
@@ -484,10 +490,12 @@ UpnpDatabase::Namei(ContentDirectoryService* server,
 		return true;
 	}
 
+	const UpnpClient_Handle handle = m_lib->getclh();
+
 	// Walk the path elements, read each directory and try to find the next one
 	for (unsigned int i = 0; i < vpath.size(); i++) {
 		UPnPDirContent dirbuf;
-		if (!server->readDir(objid.c_str(), dirbuf, error))
+		if (!server->readDir(handle, objid.c_str(), dirbuf, error))
 			return false;
 
 		// Look for the name in the sub-container list
@@ -611,7 +619,7 @@ UpnpDatabase::VisitServer(ContentDirectoryService* server,
 	   and loop here, but it's not useful as mpd will only return
 	   data to the client when we're done anyway. */
 	UPnPDirContent dirbuf;
-	if (!server->readDir(objid.c_str(), dirbuf, error))
+	if (!server->readDir(m_lib->getclh(), objid.c_str(), dirbuf, error))
 		return false;
 
 	for (const auto &dirent : dirbuf.objects) {

src/db/upnp/ContentDirectoryService.cxx

@@ -24,12 +24,10 @@
 #include "ixmlwrap.hxx"
 #include "Directory.hxx"
 #include "Util.hxx"
-#include "upnpplib.hxx"
 #include "util/Error.hxx"
 
 #include <stdio.h>
 
-#include <upnp/upnp.h>
 #include <upnp/upnptools.h>
 
 ContentDirectoryService::ContentDirectoryService(const UPnPDevice &device,
@@ -64,17 +62,12 @@ public:
 };
 
 bool
-ContentDirectoryService::readDirSlice(const char *objectId, int offset,
+ContentDirectoryService::readDirSlice(UpnpClient_Handle hdl,
+				      const char *objectId, int offset,
 				      int count, UPnPDirContent &dirbuf,
 				      int *didreadp, int *totalp,
 				      Error &error)
 {
-	LibUPnP *lib = LibUPnP::getLibUPnP(error);
-	if (lib == nullptr)
-		return false;
-
-	UpnpClient_Handle hdl = lib->getclh();
-
 	IXML_Document *request(0);
 	IXML_Document *response(0);
 	DirBResFree cleaner(&request, &response);
@@ -132,7 +125,8 @@ ContentDirectoryService::readDirSlice(const char *objectId, int offset,
 }
 
 bool
-ContentDirectoryService::readDir(const char *objectId,
+ContentDirectoryService::readDir(UpnpClient_Handle handle,
+				 const char *objectId,
 				 UPnPDirContent &dirbuf,
 				 Error &error)
 {
@@ -141,7 +135,7 @@ ContentDirectoryService::readDir(const char *objectId,
 
 	while (offset < total) {
 		int count;
-		if (!readDirSlice(objectId, offset, m_rdreqcnt, dirbuf,
+		if (!readDirSlice(handle, objectId, offset, m_rdreqcnt, dirbuf,
 				  &count, &total, error))
 			return false;
 
@@ -152,17 +146,12 @@ ContentDirectoryService::readDir(const char *objectId,
 }
 
 bool
-ContentDirectoryService::search(const char *objectId,
+ContentDirectoryService::search(UpnpClient_Handle hdl,
+				const char *objectId,
 				const char *ss,
 				UPnPDirContent &dirbuf,
 				Error &error)
 {
-	LibUPnP *lib = LibUPnP::getLibUPnP(error);
-	if (lib == nullptr)
-		return false;
-
-	UpnpClient_Handle hdl = lib->getclh();
-
 	IXML_Document *request(0);
 	IXML_Document *response(0);
 
@@ -226,15 +215,10 @@ ContentDirectoryService::search(const char *objectId,
 }
 
 bool
-ContentDirectoryService::getSearchCapabilities(std::set<std::string> &result,
+ContentDirectoryService::getSearchCapabilities(UpnpClient_Handle hdl,
+					       std::set<std::string> &result,
 					       Error &error)
 {
-	LibUPnP *lib = LibUPnP::getLibUPnP(error);
-	if (lib == nullptr)
-		return false;
-
-	UpnpClient_Handle hdl = lib->getclh();
-
 	IXML_Document *request(0);
 	IXML_Document *response(0);
 
@@ -272,16 +256,11 @@ ContentDirectoryService::getSearchCapabilities(std::set<std::string> &result,
 }
 
 bool
-ContentDirectoryService::getMetadata(const char *objectId,
+ContentDirectoryService::getMetadata(UpnpClient_Handle hdl,
+				     const char *objectId,
 				     UPnPDirContent &dirbuf,
 				     Error &error)
 {
-	LibUPnP *lib = LibUPnP::getLibUPnP(error);
-	if (lib == nullptr)
-		return false;
-
-	UpnpClient_Handle hdl = lib->getclh();
-
 	IXML_Document *response(0);
 
 	// Create request

src/db/upnp/ContentDirectoryService.hxx

@@ -20,6 +20,8 @@
 #ifndef _UPNPDIR_HXX_INCLUDED_
 #define _UPNPDIR_HXX_INCLUDED_
 
+#include <upnp/upnp.h>
+
 #include <string>
 #include <set>
 
@@ -71,10 +73,12 @@ public:
 	 * @param objectId the UPnP object Id for the container. Root has Id "0"
 	 * @param[out] dirbuf stores the entries we read.
 	 */
-	bool readDir(const char *objectId, UPnPDirContent &dirbuf,
+	bool readDir(UpnpClient_Handle handle,
+		     const char *objectId, UPnPDirContent &dirbuf,
 		     Error &error);
 
-	bool readDirSlice(const char *objectId, int offset,
+	bool readDirSlice(UpnpClient_Handle handle,
+			  const char *objectId, int offset,
 			  int count, UPnPDirContent& dirbuf,
 			  int *didread, int *total,
 			  Error &error);
@@ -89,7 +93,8 @@ public:
 	 * section 2.5.5. Maybe we'll provide an easier way some day...
 	 * @param[out] dirbuf stores the entries we read.
 	 */
-	bool search(const char *objectId, const char *searchstring,
+	bool search(UpnpClient_Handle handle,
+		    const char *objectId, const char *searchstring,
 		    UPnPDirContent &dirbuf,
 		    Error &error);
 
@@ -99,7 +104,8 @@ public:
 	 * @param[out] dirbuf stores the entries we read. At most one entry will be
 	 *   returned.
 	 */
-	bool getMetadata(const char *objectId, UPnPDirContent &dirbuf,
+	bool getMetadata(UpnpClient_Handle handle,
+			 const char *objectId, UPnPDirContent &dirbuf,
 			 Error &error);
 
 	/** Retrieve search capabilities
@@ -107,7 +113,8 @@ public:
 	 * @param[out] result an empty vector: no search, or a single '*' element:
 	 *     any tag can be used in a search, or a list of usable tag names.
 	 */
-	bool getSearchCapabilities(std::set<std::string> &result,
+	bool getSearchCapabilities(UpnpClient_Handle handle,
+				   std::set<std::string> &result,
 				   Error &error);
 
 	/** Retrieve the "friendly name" for this server, useful for display. */

src/db/upnp/Discovery.cxx

@@ -216,18 +216,14 @@ UPnPDeviceDirectory::expireDevices()
 		search();
 }
 
-UPnPDeviceDirectory::UPnPDeviceDirectory()
-	:m_searchTimeout(2), m_lastSearch(0)
+UPnPDeviceDirectory::UPnPDeviceDirectory(LibUPnP *_lib)
+	:lib(_lib), m_searchTimeout(2), m_lastSearch(0)
 {
 	if (!discoveredQueue.start(1, discoExplorer, 0)) {
 		error.Set(upnp_domain, "Discover work queue start failed");
 		return;
 	}
 
-	LibUPnP *lib = LibUPnP::getLibUPnP(error);
-	if (lib == nullptr)
-		return;
-
 	lib->SetHandler([](Upnp_EventType type, void *event){
 			cluCallBack(type, event);
 		});
@@ -243,10 +239,6 @@ UPnPDeviceDirectory::search()
 		return true;
 	m_lastSearch = now;
 
-	LibUPnP *lib = LibUPnP::getLibUPnP(error);
-	if (lib == nullptr)
-		return false;
-
 	// We search both for device and service just in case.
 	int code = UpnpSearchAsync(lib->getclh(), m_searchTimeout,
 				   ContentDirectorySType, lib);

src/db/upnp/Discovery.hxx

@@ -26,6 +26,7 @@
 
 #include <time.h>
 
+class LibUPnP;
 class ContentDirectoryService;
 
 /**
@@ -35,6 +36,8 @@ class ContentDirectoryService;
  * for now, but this could be made more general, by removing the filtering.
  */
 class UPnPDeviceDirectory {
+	LibUPnP *const lib;
+
 	Error error;
 
 	/**
@@ -47,7 +50,7 @@ class UPnPDeviceDirectory {
 	time_t m_lastSearch;
 
 public:
-	UPnPDeviceDirectory();
+	UPnPDeviceDirectory(LibUPnP *_lib);
 
 	UPnPDeviceDirectory(const UPnPDeviceDirectory &) = delete;
 	UPnPDeviceDirectory& operator=(const UPnPDeviceDirectory &) = delete;

src/db/upnp/upnpplib.cxx

@@ -27,20 +27,6 @@
 
 static LibUPnP *theLib;
 
-LibUPnP *
-LibUPnP::getLibUPnP(Error &error)
-{
-	if (theLib == nullptr)
-		theLib = new LibUPnP;
-
-	if (!theLib->ok()) {
-		error.Set(theLib->GetInitError());
-		return nullptr;
-	}
-
-	return theLib;
-}
-
 LibUPnP::LibUPnP()
 {
 	auto code = UpnpInit(0, 0);

src/db/upnp/upnpplib.hxx

@@ -35,19 +35,16 @@ class LibUPnP {
 
 	Handler handler;
 
+	static int o_callback(Upnp_EventType, void *, void *);
+
+public:
 	LibUPnP();
 
 	LibUPnP(const LibUPnP &) = delete;
 	LibUPnP &operator=(const LibUPnP &) = delete;
 
-	static int o_callback(Upnp_EventType, void *, void *);
-
-public:
 	~LibUPnP();
 
-	/** Retrieve the singleton LibUPnP object */
-	static LibUPnP *getLibUPnP(Error &error);
-
 	/** Check state after initialization */
 	bool ok() const
 	{