avoid circular #include dependence for PolledTimeout (#7356)

* move features to features.h

* fix std:: dependencies

* fix emulation on host

* api explanation

cores/esp8266/Arduino.h

@@ -177,11 +177,6 @@ void analogWriteFreq(uint32_t freq);
 void analogWriteResolution(int res);
 void analogWriteRange(uint32_t range);
 
-unsigned long millis(void);
-unsigned long micros(void);
-uint64_t micros64(void);
-void delay(unsigned long);
-void delayMicroseconds(unsigned int us);
 unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout);
 unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout);
 

cores/esp8266/Esp.h

@@ -124,10 +124,13 @@ class EspClass {
 #if defined(F_CPU) || defined(CORE_MOCK)
         constexpr uint8_t getCpuFreqMHz() const
         {
-            return clockCyclesPerMicrosecond();
+            return esp_get_cpu_freq_mhz();
         }
 #else
-        uint8_t getCpuFreqMHz();
+        uint8_t getCpuFreqMHz() const
+        {
+            return esp_get_cpu_freq_mhz();
+        }
 #endif
 
         uint32_t getFlashChipId();

cores/esp8266/PolledTimeout.h

@@ -4,7 +4,7 @@
 
 /*
  PolledTimeout.h - Encapsulation of a polled Timeout
- 
+
  Copyright (c) 2018 Daniel Salazar. All rights reserved.
  This file is part of the esp8266 core for Arduino environment.
 
@@ -23,9 +23,10 @@
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include <limits>
-
-#include <Arduino.h>
+#include <c_types.h>               // IRAM_ATTR
+#include <limits>                  // std::numeric_limits
+#include <type_traits>             // std::is_unsigned
+#include <core_esp8266_features.h>
 
 namespace esp8266
 {
@@ -70,13 +71,13 @@ struct TimeSourceMillis
 
 struct TimeSourceCycles
 {
-  // time policy based on ESP.getCycleCount()
+  // time policy based on esp_get_cycle_count()
   // this particular time measurement is intended to be called very often
   // (every loop, every yield)
 
-  using timeType = decltype(ESP.getCycleCount());
-  static timeType time() {return ESP.getCycleCount();}
-  static constexpr timeType ticksPerSecond    = ESP.getCpuFreqMHz() * 1000000UL;     // 80'000'000 or 160'000'000 Hz
+  using timeType = decltype(esp_get_cycle_count());
+  static timeType time() {return esp_get_cycle_count();}
+  static constexpr timeType ticksPerSecond    = esp_get_cpu_freq_mhz() * 1000000UL;     // 80'000'000 or 160'000'000 Hz
   static constexpr timeType ticksPerSecondMax = 160000000; // 160MHz
 };
 
@@ -161,13 +162,13 @@ public:
       return expiredRetrigger();
     return expiredOneShot();
   }
-  
+
   IRAM_ATTR // fast
   operator bool()
   {
-    return expired(); 
+    return expired();
   }
-  
+
   bool canExpire () const
   {
     return !_neverExpires;
@@ -178,6 +179,7 @@ public:
     return _timeout != alwaysExpired;
   }
 
+  // Resets, will trigger after this new timeout.
   IRAM_ATTR // called from ISR
   void reset(const timeType newUserTimeout)
   {
@@ -186,12 +188,30 @@ public:
     _neverExpires = (newUserTimeout < 0) || (newUserTimeout > timeMax());
   }
 
+  // Resets, will trigger after the timeout previously set.
   IRAM_ATTR // called from ISR
   void reset()
   {
     _start = TimePolicyT::time();
   }
 
+  // Resets to just expired so that on next poll the check will immediately trigger for the user,
+  // also change timeout (after next immediate trigger).
+  IRAM_ATTR // called from ISR
+  void resetAndSetExpired (const timeType newUserTimeout)
+  {
+    reset(newUserTimeout);
+    _start -= _timeout;
+  }
+
+  // Resets to just expired so that on next poll the check will immediately trigger for the user.
+  IRAM_ATTR // called from ISR
+  void resetAndSetExpired ()
+  {
+    reset();
+    _start -= _timeout;
+  }
+
   void resetToNeverExpires ()
   {
     _timeout = alwaysExpired + 1; // because canWait() has precedence
@@ -202,7 +222,7 @@ public:
   {
     return TimePolicyT::toUserUnit(_timeout);
   }
-  
+
   static constexpr timeType timeMax()
   {
     return TimePolicyT::timeMax;
@@ -235,14 +255,14 @@ protected:
     }
     return false;
   }
-  
+
   IRAM_ATTR // fast
   bool expiredOneShot() const
   {
     // returns "always expired" or "has expired"
     return !canWait() || checkExpired(TimePolicyT::time());
   }
-  
+
   timeType _timeout;
   timeType _start;
   bool _neverExpires;
@@ -259,14 +279,14 @@ using periodic = polledTimeout::timeoutTemplate<true> /*__attribute__((deprecate
 using oneShotMs = polledTimeout::timeoutTemplate<false>;
 using periodicMs = polledTimeout::timeoutTemplate<true>;
 
-// Time policy based on ESP.getCycleCount(), and intended to be called very often:
+// Time policy based on esp_get_cycle_count(), and intended to be called very often:
 // "Fast" versions sacrifices time range for improved precision and reduced execution time (by 86%)
-// (cpu cycles for ::expired(): 372 (millis()) vs 52 (ESP.getCycleCount()))
+// (cpu cycles for ::expired(): 372 (millis()) vs 52 (esp_get_cycle_count()))
 // timeMax() values:
 // Ms: max is 26843       ms (26.8  s)
 // Us: max is 26843545    us (26.8  s)
 // Ns: max is  1073741823 ns ( 1.07 s)
-// (time policy based on ESP.getCycleCount() is intended to be called very often)
+// (time policy based on esp_get_cycle_count() is intended to be called very often)
 
 using oneShotFastMs = polledTimeout::timeoutTemplate<false, YieldPolicy::DoNothing, TimePolicy::TimeFastMillis>;
 using periodicFastMs = polledTimeout::timeoutTemplate<true, YieldPolicy::DoNothing, TimePolicy::TimeFastMillis>;

cores/esp8266/core_esp8266_features.h

@@ -123,6 +123,29 @@ extern "C" {
 #endif
 
 void precache(void *f, uint32_t bytes);
+unsigned long millis(void);
+unsigned long micros(void);
+uint64_t micros64(void);
+void delay(unsigned long);
+void delayMicroseconds(unsigned int us);
+
+#if defined(F_CPU) || defined(CORE_MOCK)
+#ifdef __cplusplus
+constexpr
+#else
+inline
+#endif
+int esp_get_cpu_freq_mhz()
+{
+    return F_CPU / 1000000L;
+}
+#else
+inline int esp_get_cpu_freq_mhz()
+{
+    return system_get_cpu_freq();
+}
+#endif
+
 
 #ifdef __cplusplus
 }

tests/host/common/MockEsp.cpp

@@ -208,7 +208,7 @@ uint32_t EspClass::getFlashChipSize(void)
 
 String EspClass::getFullVersion ()
 {
-	return "host-emulation";
+	return "emulation-on-host";
 }
 
 uint32_t EspClass::getFreeContStack()
@@ -221,6 +221,11 @@ void EspClass::resetFreeContStack()
 }
 
 uint32_t EspClass::getCycleCount()
+{
+    return esp_get_cycle_count();
+}
+
+uint32_t esp_get_cycle_count()
 {
     timeval t;
     gettimeofday(&t, NULL);

tests/host/common/mock.h

@@ -31,6 +31,29 @@
 
 #define CORE_MOCK 1
 
+//
+
+#define ARDUINO 267
+#define ESP8266 1
+#define A0 0
+#define LED_BUILTIN 0
+#define F_CPU 80000000
+#define LWIP_OPEN_SRC
+#define TCP_MSS 536
+#define LWIP_FEATURES 1
+
+//
+
+#define D0 0
+#define D1 1
+#define D2 3
+#define D3 3
+#define D4 4
+#define D5 5
+#define D6 6
+#define D7 7
+#define D8 8
+
 // include host's STL before any other include file
 // because core definition like max() is in the way
 
@@ -61,28 +84,10 @@ typedef uint32_t uint32;
 
 //
 
-#define ARDUINO 267
-#define ESP8266 1
-#define A0 0
-#define LED_BUILTIN 0
-#define F_CPU 80000000
-#define LWIP_OPEN_SRC
-#define TCP_MSS 536
-#define LWIP_FEATURES 1
+#include <c_types.h>
+#include <core_esp8266_features.h>
 
-//
-
-#define D0 0
-#define D1 1
-#define D2 3
-#define D3 3
-#define D4 4
-#define D5 5
-#define D6 6
-#define D7 7
-#define D8 8
-
-//
+uint32_t esp_get_cycle_count();
 
 #include <Arduino.h>