From: Otto Moerbeek <otto.moerbeek@open-xchange.com>
Date: Fri, 10 May 2019 11:45:00 +0000 (+0200)
Subject: Minimal fix to avoid busy looping. The condition_variable varant showed
X-Git-Tag: auth-4.1.9~4^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fpull%2F7829%2Fhead;p=thirdparty%2Fpdns.git

Minimal fix to avoid busy looping. The condition_variable varant showed
spurious failures on travis so go for the minimial fix.
---

diff --git a/pdns/communicator.cc b/pdns/communicator.cc
index 7db5a3e5b6..7fd59e450e 100644
--- a/pdns/communicator.cc
+++ b/pdns/communicator.cc
@@ -136,7 +136,10 @@ void CommunicatorClass::mainloop(void)
           if (extraSlaveRefresh)
             slaveRefresh(&P);
         }
-        else { 
+        else {
+          // eat up extra posts to avoid busy looping if many posts were done
+          while (d_any_sem.tryWait() == 0) {
+          }
           break; // something happened
         }
         // this gets executed at least once every second