vpcd: added real thread safety

virtualsmartcard/src/vpcd/lock.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2014 Frank Morgner
+ *
+ * This file is part of virtualsmartcard.
+ *
+ * virtualsmartcard 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.
+ *
+ * virtualsmartcard 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
+ * virtualsmartcard.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _LOCK_H_
+#define _LOCK_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int lock(void *io_lock);
+int unlock(void *io_lock);
+void *create_lock(void);
+void free_lock(void *io_lock);
+#ifdef  __cplusplus
+}
+#endif
+#endif