Start mining threads only after RandomX dataset initialization.

src/backend/common/common.cmake

@@ -1,6 +1,7 @@
 set(HEADERS_BACKEND_COMMON
     src/backend/common/Hashrate.h
     src/backend/common/interfaces/IBackend.h
+    src/backend/common/interfaces/IRxListener.h
     src/backend/common/interfaces/IThread.h
     src/backend/common/interfaces/IWorker.h
     src/backend/common/misc/PciTopology.h

src/backend/common/interfaces/IRxListener.h

@@ -0,0 +1,44 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2016-2018 XMRig       <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef XMRIG_IRXLISTENER_H
+#define XMRIG_IRXLISTENER_H
+
+
+namespace xmrig {
+
+
+class IRxListener
+{
+public:
+    virtual ~IRxListener() = default;
+
+#   ifdef XMRIG_ALGO_RANDOMX
+    virtual void onDatasetReady() = 0;
+#   endif
+};
+
+
+} /* namespace xmrig */
+
+
+#endif // XMRIG_IRXLISTENER_H