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-rw-r--r--src/lib/upnp/Discovery.cxx11
-rw-r--r--src/lib/upnp/Discovery.hxx2
2 files changed, 6 insertions, 7 deletions
diff --git a/src/lib/upnp/Discovery.cxx b/src/lib/upnp/Discovery.cxx
index 80157c707..f6a3ba122 100644
--- a/src/lib/upnp/Discovery.cxx
+++ b/src/lib/upnp/Discovery.cxx
@@ -212,7 +212,6 @@ UPnPDeviceDirectory::Invoke(Upnp_EventType et, void *evp)
bool
UPnPDeviceDirectory::ExpireDevices(Error &error)
{
- const ScopeLock protect(mutex);
const unsigned now = MonotonicClockS();
bool didsomething = false;
@@ -291,12 +290,11 @@ bool
UPnPDeviceDirectory::GetDirectories(std::vector<ContentDirectoryService> &out,
Error &error)
{
- // Has locking, do it before our own lock
+ const ScopeLock protect(mutex);
+
if (!ExpireDevices(error))
return false;
- const ScopeLock protect(mutex);
-
for (auto dit = directories.begin();
dit != directories.end(); dit++) {
for (const auto &service : dit->device.services) {
@@ -314,12 +312,11 @@ UPnPDeviceDirectory::GetServer(const char *friendly_name,
ContentDirectoryService &server,
Error &error)
{
- // Has locking, do it before our own lock
+ const ScopeLock protect(mutex);
+
if (!ExpireDevices(error))
return false;
- const ScopeLock protect(mutex);
-
for (const auto &i : directories) {
const auto &device = i.device;
diff --git a/src/lib/upnp/Discovery.hxx b/src/lib/upnp/Discovery.hxx
index 970fb306e..1cf82b77e 100644
--- a/src/lib/upnp/Discovery.hxx
+++ b/src/lib/upnp/Discovery.hxx
@@ -138,6 +138,8 @@ private:
* Look at the devices and get rid of those which have not
* been seen for too long. We do this when listing the top
* directory.
+ *
+ * Caller must lock #mutex.
*/
bool ExpireDevices(Error &error);