Initial InfiniSim project

sim/timers.cpp

@@ -0,0 +1,69 @@
+#include "timers.h"
+#include <stdexcept>
+
+uint32_t timer_callback_wrapper(uint32_t interval, void *param) {
+  TimerHandle_t *xTimer = static_cast<TimerHandle_t*>(param);
+  if (!xTimer->running) {
+    return 0;
+  }
+  xTimer->pxCallbackFunction(*xTimer);
+  if (xTimer->auto_reload) {
+    return xTimer->xTimerPeriodInTicks;
+  }
+  xTimer->running = false;
+  return 0; // cancel timer
+}
+
+void *pvTimerGetTimerID(const TimerHandle_t &xTimer) { // return pvTimerID from xTimerCreate
+  return xTimer.pvTimerID;
+}
+void vTimerSetTimerID(TimerHandle_t &xTimer, void *pvNewID) {
+  xTimer.pvTimerID = pvNewID;
+}
+
+TimerHandle_t xTimerCreate(const char * const pcTimerName, /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
+  const TickType_t xTimerPeriodInTicks,
+  const UBaseType_t uxAutoReload, // false=one-shot, true=recurring
+  void * const pvTimerID, // pointer passed to callback
+  TimerCallbackFunction_t pxCallbackFunction)
+{
+  TimerHandle_t xTimer;
+  xTimer.xTimerPeriodInTicks = xTimerPeriodInTicks;
+  xTimer.auto_reload = uxAutoReload == pdTRUE;
+  xTimer.timer_name = pcTimerName;
+  xTimer.pvTimerID = pvTimerID;
+  xTimer.pxCallbackFunction = pxCallbackFunction;
+  return xTimer;
+}
+
+bool xTimerStart(TimerHandle_t &xTimer, TickType_t xTicksToWait) {
+  xTimer.running = true;
+  xTimer.timer_id = SDL_AddTimer(xTimer.xTimerPeriodInTicks, timer_callback_wrapper, &xTimer);
+  if (xTimer.pxCallbackFunction == nullptr) {
+    throw std::runtime_error("xTimerStart called before xTimerCreate");
+  }
+  return xTimer.timer_id != 0;
+}
+
+bool xTimerChangePeriod(TimerHandle_t &xTimer, TickType_t xNewPeriod, TickType_t xTicksToWait) {
+  if (xTimer.running) {
+    xTimerStop(xTimer, xTicksToWait);
+    xTimer.xTimerPeriodInTicks = xNewPeriod;
+    xTimerStart(xTimer, xTicksToWait);
+  } else {
+    xTimer.xTimerPeriodInTicks = xNewPeriod;
+  }
+  return true;
+}
+
+bool xTimerReset(TimerHandle_t &xTimer,  TickType_t xTicksToWait) {
+  if (xTimer.running) {
+    xTimerStop(xTimer, xTicksToWait);
+  }
+  return xTimerStart(xTimer, xTicksToWait);
+}
+
+bool xTimerStop(TimerHandle_t &xTimer,  TickType_t xTicksToWait) {
+  xTimer.running = false;
+  return SDL_RemoveTimer(xTimer.timer_id);
+}