add destructor so the spsc-queue will compile on MAC

diff --git a/conditionvariable.cc b/conditionvariable.cc
index f79cf2a9feacef6c5f1ee3942e5750c58b34eb23..75af879ff63cf53e2c5675e6bc6a120f67d06782 100644 (file)
--- a/conditionvariable.cc
+++ b/conditionvariable.cc
@@ -9,6 +9,10 @@ condition_variable::condition_variable() {
                
 }
 
+condition_variable::~condition_variable() {
+               
+}
+
 void condition_variable::notify_one() {
        model->switch_to_master(new ModelAction(ATOMIC_NOTIFY_ONE, std::memory_order_seq_cst, this));
 }