Diff: utility/TimeoutTimer.h

Revision:

0:a80552d32b80

Child:

1:6ff0eee2da9c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utility/TimeoutTimer.h	Sat Feb 06 20:58:22 2021 +0000
@@ -0,0 +1,62 @@
+/**************************************************************************/
+/*!
+    @file     TimeoutTimer.h
+    @author   hathach
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2014, Adafruit Industries (adafruit.com)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/**************************************************************************/
+
+/** 
+ *  @{
+ */
+
+#ifndef _TIMEOUT_TIMER_H_
+#define _TIMEOUT_TIMER_H_
+
+class TimeoutTimer
+{
+  private:
+    Timer timer;
+    chrono::milliseconds next, interval;
+
+  public:
+    TimeoutTimer()              { set(0); }
+    TimeoutTimer(uint32_t msec) { set(msec); }
+
+    void set(uint32_t msec)     { timer.reset(); next = msec * 1ms; interval = msec * 1ms; }
+    bool expired(void)  const   { return (timer.elapsed_time() >= next); }
+    void restart(void)          { timer.reset(); next = interval; }
+    void reset(void)            { next += interval; } // used for periodic invoke to prevent drift
+};
+
+#endif /* _TIMEOUT_TIMER_H_ */
+
+/** @} */