1 files changed, 58 insertions, 0 deletions
diff --git a/common/core/time.h b/common/core/time.h
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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * Copyright 2011-2019 Pierre Ossman for Cendio AB
+ * 
+ * This 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 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software 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 software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// time.h - time helper functions
+//
+
+#ifndef __CORE_TIME_H__
+#define __CORE_TIME_H__
+
+#include <limits.h>
+
+struct timeval;
+
+namespace core {
+
+  // secsToMillis() turns seconds into milliseconds, capping the value so it
+  //   can't wrap round and become -ve
+  inline int secsToMillis(int secs) {
+    return (secs < 0 || secs > (INT_MAX/1000) ? INT_MAX : secs * 1000);
+  }
+
+  // Returns time elapsed between two moments in milliseconds.
+  unsigned msBetween(const struct timeval *first,
+                     const struct timeval *second);
+
+  // Returns time elapsed since given moment in milliseconds.
+  unsigned msSince(const struct timeval *then);
+
+  // Returns time until the given moment in milliseconds.
+  unsigned msUntil(const struct timeval *then);
+
+  // Returns true if first happened before seconds
+  bool isBefore(const struct timeval *first,
+                const struct timeval *second);
+
+  // Returns a new timeval a specified number of milliseconds later than
+  // the given timeval
+  struct timeval addMillis(struct timeval inTime, int millis);
+}
+
+#endif