Move a lock.

src/prrt/socket.c

@@ -116,10 +116,9 @@ int PrrtSocket_connect(PrrtSocket *sock_ptr, const char *host, const uint16_t po
 
 int PrrtSocket_send(PrrtSocket *sock_ptr, const uint8_t *data, const size_t data_len) {
     check(sock_ptr->isSender, "Cannot send on receiver socket.")
-    check(pthread_mutex_lock(&sock_ptr->outQueueFilledMutex) == 0, "Lock failed.");
-
     PrrtPacket *packet = PrrtPacket_create_data_packet(5, data, (prrtPacketLength_t) data_len, 0, PrrtApplicationConstraints_get_target_delay(sock_ptr->applicationConstraints));
 
+    check(pthread_mutex_lock(&sock_ptr->outQueueFilledMutex) == 0, "Lock failed.");
     List_push(sock_ptr->outQueue, packet);
     check(pthread_cond_signal(&sock_ptr->outQueueFilledCv) == 0, "Signal failed.");
     check(pthread_mutex_unlock(&sock_ptr->outQueueFilledMutex) == 0, "Unlock failed");