Port Schedule to ESP32.

Same yield behavior as on ESP8266 - scheduler has policies for loop and yield initiated runs.

Author: dok-net

cores/esp32/Schedule.cpp

@@ -31,17 +31,17 @@ namespace {
 	{
 		auto repeat_ms = (repeat_us + 500) / 1000;
 		ticker->once_ms(repeat_ms, [ticker, fn, repeat_us, policy]()
-		{
-			if (!schedule_function([ticker, fn, repeat_us, policy]()
-				{
-					if (fn()) ticker_scheduled(ticker, fn, repeat_us, policy);
-					else delete ticker;
-					return false;
-				}, policy))
 			{
-				ticker_scheduled(ticker, fn, repeat_us, policy);
-			}
-		});
+				if (!schedule_function([ticker, fn, repeat_us, policy]()
+					{
+						if (fn()) ticker_scheduled(ticker, fn, repeat_us, policy);
+						else delete ticker;
+						return false;
+					}, policy))
+				{
+					ticker_scheduled(ticker, fn, repeat_us, policy);
+				}
+			});
 	}
 };
 
@@ -119,8 +119,10 @@ void run_scheduled_functions(schedule_e policy)
 	schedule_queue.for_each_requeue([policy, &yieldNow](scheduled_fn_t& func)
 		{
 			if (yieldNow) {
-#ifdef ESP8266
+#if defined(ESP8266)
 				cont_yield(g_pcont);
+#elif defined(ESP32)
+				vPortYield();
 #else
 				yield();
 #endif

cores/esp32/Schedule.h

@@ -1,8 +1,6 @@
 #ifndef ESP_SCHEDULE_H
 #define ESP_SCHEDULE_H
 
-#include <functional>
-
 // This API is stabilizing
 // Function signatures may change, internal queue will remain FIFO.
 //
@@ -24,13 +22,21 @@
 // * Returns false if the number of scheduled functions exceeds
 //   SCHEDULED_FN_MAX_COUNT.
 
+#ifdef __cplusplus
+#include <functional>
+extern "C" {
+#endif
+
 #define SCHEDULED_FN_MAX_COUNT 32
 
-enum schedule_e
+typedef enum schedule_e_t
 {
     SCHEDULE_FUNCTION_FROM_LOOP,
     SCHEDULE_FUNCTION_WITHOUT_YIELDELAYCALLS
-};
+} schedule_e;
+
+#ifdef __cplusplus
+}
 
 // * Run the lambda only once next time
 bool schedule_function(std::function<void(void)>&& fn,
@@ -50,9 +56,18 @@ bool schedule_function_us(const std::function<bool(void)>& fn,
                           uint32_t repeat_us,
                           schedule_e policy = SCHEDULE_FUNCTION_FROM_LOOP);
 
+extern "C" {
+#endif /* __cplusplus */
+
 // Run all scheduled functions.
 // Use this function if your are not using `loop`, or `loop` does not return
 // on a regular basis.
-void run_scheduled_functions(schedule_e policy = SCHEDULE_FUNCTION_FROM_LOOP);
 
-#endif //ESP_SCHEDULE_H
+#ifndef __cplusplus
+    void run_scheduled_functions(schedule_e policy);
+#else
+    void run_scheduled_functions(schedule_e policy = SCHEDULE_FUNCTION_FROM_LOOP);
+}
+#endif
+
+#endif //ESP_SCHEDULE_H