Dont ever run two scan threads

diff --git a/src/main.rs b/src/main.rs
index ae38a5bc3e6845fcf3a658812f49233339673873..3086731dc96f71946fc7f59b5cf8c806070be185 100644 (file)
--- a/src/main.rs
+++ b/src/main.rs
@@ -33,6 +33,7 @@ static mut HEIGHT_MAP: Option<Box<Mutex<HashMap<u64, sha256d::Hash>>>> = None;
 static mut DATA_STORE: Option<Box<Store>> = None;
 static mut PRINTER: Option<Box<Printer>> = None;
 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
+static SCANNING: AtomicBool = AtomicBool::new(false);
 
 struct PeerState {
        request: (u64, sha256d::Hash),
@@ -263,7 +264,9 @@ fn make_trusted_conn(trusted_sockaddr: SocketAddr) {
                                                        = (headers.last().unwrap().bitcoin_hash(), top_height);
                                                printer.set_stat(printer::Stat::HeaderCount(top_height));
                                                if top_height >= starting_height as u64 {
-                                                       scan_net();
+                                                       if !SCANNING.swap(true, Ordering::SeqCst) {
+                                                               scan_net();
+                                                       }
                                                }
                                        } else {
                                                // Wat? Lets start again...