Diff: src/Platform/mbed/MQTTTimer.h

Revision:

0:09ef59d2d0f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Platform/mbed/MQTTTimer.h	Fri Oct 07 17:21:45 2016 +0000
@@ -0,0 +1,80 @@
+/*
+The MIT License(MIT)
+
+Cayenne MQTT Client Library
+Copyright (c) 2016 myDevices
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+documentation files(the "Software"), to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the Software,
+and to permit persons to whom the Software is furnished to do so, subject to the following conditions :
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef _MQTTTIMER_h
+#define _MQTTTIMER_h
+
+#include "mbed.h"
+
+/**
+* Timer class for use with MQTTClient.
+*/
+class MQTTTimer : private Timer
+{
+public:
+    /**
+    * Construct a timer.
+    */
+    MQTTTimer() : interval_end_ms(0) {};
+
+    /**
+    * Construct a timer and start it.
+    * @param[in] milliseconds Number of milliseconds to count down.
+    */
+    MQTTTimer(int milliseconds) { 
+        countdown_ms(milliseconds);
+    }
+    
+    /**
+    * Start countdown.
+    * @param[in] milliseconds Number of milliseconds to count down.
+    */
+    void countdown_ms(int milliseconds) {
+        interval_end_ms = milliseconds;
+        reset();
+        start();
+    }
+
+    /**
+    * Start countdown.
+    * @param[in] seconds Number of seconds to count down.
+    */
+    void countdown(int seconds) {
+        countdown_ms(seconds * 1000);
+    }
+
+    /**
+    * Get the number of milliseconds left in countdown.
+    * @return Number of milliseconds left.
+    */
+    int left_ms() {
+        return interval_end_ms - read_ms();
+    }
+
+    /**
+    * The countdown timer has expired.
+    * @return true if countdown has expired, false otherwise.
+    */
+    bool expired() {
+        return (interval_end_ms > 0L) && (read_ms() >= interval_end_ms);
+    }
+    
+private:
+    unsigned long interval_end_ms;
+};
+
+#endif
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