Merge branch 'feature/c++'

FreeRTOS/Source/portable/esp8266/port.c

@@ -178,6 +178,9 @@ void xPortSysTickHandle (void)
 	//OpenNMI();
 }
 
+static bool sdk_compat_initialised;
+void sdk_compat_initialise(void);
+
 /*
  * See header file for description.
  */
@@ -186,6 +189,14 @@ portBASE_TYPE xPortStartScheduler( void )
     _xt_isr_attach(INUM_SOFT, SV_ISR);
     _xt_isr_unmask(BIT(INUM_SOFT));
 
+    /* ENORMOUS HACK: Call the sdk_compat_initialise() function.
+       This can be removed happily once we have open source startup code.
+    */
+    if(!sdk_compat_initialised) {
+        sdk_compat_initialised = true;
+        sdk_compat_initialise();
+    }
+
     /* Initialize system tick timer interrupt and schedule the first tick. */
     sdk__xt_tick_timer_init();
 

common.mk

@@ -94,14 +94,19 @@ OWN_LIBC ?= 1
 # Note: you will need a recent esp
 ENTRY_SYMBOL ?= call_user_start
 
-CFLAGS		= -Wall -Werror -Wl,-EL -nostdlib -mlongcalls -mtext-section-literals -std=gnu99 $(CPPFLAGS)
+# Common flags for both C & C++_
+C_CXX_FLAGS     = -Wall -Werror -Wl,-EL -nostdlib -mlongcalls -mtext-section-literals $(CPPFLAGS)
+# Flags for C only
+CFLAGS		= $(C_CXX_FLAGS) -std=gnu99
+# Flags for C++ only
+CXXFLAGS	= $(C_CXX_FLAGS) -fno-exceptions -fno-rtti
 LDFLAGS		= -nostdlib -Wl,--no-check-sections -Wl,-L$(BUILD_DIR)sdklib -Wl,-L$(ROOT)lib -u $(ENTRY_SYMBOL) -Wl,-static -Wl,-Map=build/${PROGRAM}.map $(EXTRA_LDFLAGS)
 
 ifeq ($(FLAVOR),debug)
-    CFLAGS += -g -O0
+    C_CXX_FLAGS += -g -O0
     LDFLAGS += -g -O0
 else
-    CFLAGS += -g -O2
+    C_CXX_FLAGS += -g -O2
     LDFLAGS += -g -O2
 endif
 
@@ -216,19 +221,23 @@ $(1)_ROOT ?= $$($(1)_DEFAULT_ROOT)
 $(1)_OBJ_DIR   = $(call lc,$(BUILD_DIR)$(1)/)
 ### determine source files and object files ###
 $(1)_SRC_FILES ?= $$(foreach sdir,$$($(1)_SRC_DIR), 				\
-			$$(wildcard $$(sdir)/*.c) $$(wildcard $$(sdir)/*.S)) \
+			$$(wildcard $$(sdir)/*.c) $$(wildcard $$(sdir)/*.S) 	\
+			$$(wildcard $$(sdir)/*.cpp)) 				\
 			$$($(1)_EXTRA_SRC_FILES)
 $(1)_REAL_SRC_FILES = $$(foreach sfile,$$($(1)_SRC_FILES),$$(realpath $$(sfile)))
 $(1)_REAL_ROOT = $$(realpath $$($(1)_ROOT))
 # patsubst here substitutes real component root path for the relative OBJ_DIR path, making things short again
-$(1)_OBJ_FILES_C = $$(patsubst $$($(1)_REAL_ROOT)%.c,$$($(1)_OBJ_DIR)%.o,$$($(1)_REAL_SRC_FILES))
+$(1)_OBJ_FILES_CXX = $$(patsubst $$($(1)_REAL_ROOT)%.cpp,$$($(1)_OBJ_DIR)%.o,$$($(1)_REAL_SRC_FILES))
+$(1)_OBJ_FILES_C = $$(patsubst $$($(1)_REAL_ROOT)%.c,$$($(1)_OBJ_DIR)%.o,$$($(1)_OBJ_FILES_CXX))
 $(1)_OBJ_FILES = $$(patsubst $$($(1)_REAL_ROOT)%.S,$$($(1)_OBJ_DIR)%.o,$$($(1)_OBJ_FILES_C))
 # the last included makefile is our component's component.mk makefile (rebuild the component if it changes)
 $(1)_MAKEFILE ?= $(lastword $(MAKEFILE_LIST))
 
 ### determine compiler arguments ###
 $(1)_CFLAGS ?= $(CFLAGS)
+$(1)_CXXFLAGS ?= $(CXXFLAGS)
 $(1)_CC_ARGS = $(Q) $(CC) $$(addprefix -I,$$(INC_DIRS)) $$(addprefix -I,$$($(1)_INC_DIR)) $$($(1)_CFLAGS)
+$(1)_CXX_ARGS = $(Q) $(C++) $$(addprefix -I,$$(INC_DIRS)) $$(addprefix -I,$$($(1)_INC_DIR)) $$($(1)_CXXFLAGS)
 $(1)_AR = $(call lc,$(BUILD_DIR)$(1).a)
 
 $$($(1)_OBJ_DIR)%.o: $$($(1)_REAL_ROOT)%.c $$($(1)_MAKEFILE) $(wildcard $(ROOT)*.mk) | $$($(1)_SRC_DIR)
@@ -237,6 +246,12 @@ $$($(1)_OBJ_DIR)%.o: $$($(1)_REAL_ROOT)%.c $$($(1)_MAKEFILE) $(wildcard $(ROOT)*
 	$$($(1)_CC_ARGS) -c $$< -o $$@
 	$$($(1)_CC_ARGS) -MM -MT $$@ -MF $$(@:.o=.d) $$<
 
+$$($(1)_OBJ_DIR)%.o: $$($(1)_REAL_ROOT)%.cpp $$($(1)_MAKEFILE) $(wildcard $(ROOT)*.mk) | $$($(1)_SRC_DIR)
+	$(vecho) "C++ $$<"
+	$(Q) mkdir -p $$(dir $$@)
+	$$($(1)_CXX_ARGS) -c $$< -o $$@
+	$$($(1)_CXX_ARGS) -MM -MT $$@ -MF $$(@:.o=.d) $$<
+
 $$($(1)_OBJ_DIR)%.o: $$($(1)_REAL_ROOT)%.S $$($(1)_MAKEFILE) $(wildcard $(ROOT)*.mk) | $$($(1)_SRC_DIR)
 	$(vecho) "AS $$<"
 	$(Q) mkdir -p $$(dir $$@)

core/cplusplus_operators.cpp

@@ -0,0 +1,25 @@
+/* Part of esp-open-rtos
+ * BSD Licensed as described in the file LICENSE
+ */
+#include <stdio.h>
+#include <stdlib.h>
+
+void *operator new(size_t size)
+{
+    return malloc(size);
+}
+
+void *operator new[](size_t size)
+{
+    return malloc(size);
+}
+
+void operator delete(void * ptr)
+{
+    free(ptr);
+}
+
+void operator delete[](void * ptr)
+{
+    free(ptr);
+}

core/include/common_macros.h

@@ -10,6 +10,8 @@
 #ifndef _COMMON_MACROS_H
 #define _COMMON_MACROS_H
 
+#include <sys/cdefs.h>
+
 #define UNUSED __attributed((unused))
 
 #ifndef BIT
@@ -45,7 +47,11 @@
    Important to note: IROM flash can only be accessed via 32-bit word
    aligned reads. It's up to the user of this attribute to ensure this.
 */
+#ifdef	__cplusplus
+    #define IROM __attribute__((section(".irom0.literal")))
+#else
     #define IROM __attribute__((section(".irom0.literal"))) const
+#endif
 
 #define INLINED inline static __attribute__((always_inline)) __attribute__((unused))
 

core/include/esp/gpio.h

@@ -122,7 +122,7 @@ INLINED void gpio_set_interrupt(const uint8_t gpio_num, const gpio_inttype_t int
 /* Return the interrupt type set for a pin */
 INLINED gpio_inttype_t gpio_get_interrupt(const uint8_t gpio_num)
 {
-    return FIELD2VAL(GPIO_CONF_INTTYPE, GPIO.CONF[gpio_num]);
+    return (gpio_inttype_t)FIELD2VAL(GPIO_CONF_INTTYPE, GPIO.CONF[gpio_num]);
 }
 
 #endif

core/sdk_compat.c

@@ -14,3 +14,18 @@ void IRAM *zalloc(size_t nbytes)
 {
     return calloc(1, nbytes);
 }
+
+extern void (*__init_array_start)(void);
+extern void (*__init_array_end)(void);
+
+/* Do things which should be done as part of the startup code, but aren't.
+
+   Can be replaced with _start() once we have open source startup code.
+*/
+void sdk_compat_initialise()
+{
+    /* Call C++ constructors or C functions marked with __attribute__((constructor)) */
+    void (**p)(void);
+    for ( p = &__init_array_start; p != &__init_array_end; ++p)
+        (*p)();
+}

examples/Makefile

@@ -22,10 +22,10 @@ build-examples: $(EXAMPLES_BUILD)
 rebuild-examples: $(EXAMPLES_REBUILD)
 
 %.dummybuild:
-	make -C $(dir $@)
+	$(MAKE) -C $(dir $@)
 
 %.dummyrebuild:
-	make -C $(dir $@) rebuild
+	$(MAKE) -C $(dir $@) rebuild
 
 .PHONY: warning rebuild-examples build-examples
 .NOTPARALLEL:

examples/cpp_01_tasks/Makefile

@@ -0,0 +1,5 @@
+# Simple makefile for simple example
+PROGRAM=cpp_01_tasks
+OTA=0
+EXTRA_COMPONENTS=extras/cpp_support
+include ../../common.mk

examples/cpp_01_tasks/main.cpp

@@ -0,0 +1,106 @@
+/* 
+ * The MIT License (MIT)
+ * 
+ * ESP8266 FreeRTOS Firmware
+ * Copyright (c) 2015 Michael Jacobsen (github.com/mikejac)
+ * 
+ * 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.
+ *
+ * https://github.com/SuperHouse/esp-open-rtos
+ * 
+ */
+
+#include "task.hpp"
+#include "queue.hpp"
+
+#include "espressif/esp_common.h"
+
+/******************************************************************************************************************
+ * task_1_t
+ *
+ */
+class task_1_t: public esp_open_rtos::thread::task_t
+{
+public:
+    esp_open_rtos::thread::queue_t<uint32_t> queue;
+    
+private:
+    void task()
+    {
+        printf("task_1_t::task(): start\n");
+
+        uint32_t count = 0;
+
+        while(true) {
+            sleep(1000);
+            queue.post(count);
+            count++;
+        }
+    }    
+};
+/******************************************************************************************************************
+ * task_2_t
+ *
+ */
+class task_2_t: public esp_open_rtos::thread::task_t
+{
+public:
+    esp_open_rtos::thread::queue_t<uint32_t> queue;
+    
+private:
+    void task()
+    {
+        printf("task_2_t::task(): start\n");
+
+        while(true) {
+            uint32_t count;
+
+            if(queue.receive(count, 1500) == 0) {
+                printf("task_2_t::task(): got %u\n", count);
+            } 
+            else {
+                printf("task_2_t::task(): no msg\n");
+            }
+        }
+    }    
+};
+/******************************************************************************************************************
+ * globals
+ *
+ */
+task_1_t task_1;
+task_2_t task_2;
+
+esp_open_rtos::thread::queue_t<uint32_t> MyQueue;
+
+/**
+ * 
+ */
+extern "C" void user_init(void)
+{
+    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
+	
+    MyQueue.queue_create(10);
+    
+    task_1.queue = MyQueue;
+    task_2.queue = MyQueue;
+    
+    task_1.task_create("tsk1");
+    task_2.task_create("tsk2");
+}

examples/simple_cplusplus/Makefile

@@ -0,0 +1,3 @@
+# Simple makefile for simple example
+PROGRAM=simple
+include ../../common.mk

examples/simple_cplusplus/simple.cpp

@@ -0,0 +1,64 @@
+/* A very basic C++ example, really just proof of concept for C++
+
+   This sample code is in the public domain.
+ */
+#include "espressif/esp_common.h"
+#include "espressif/sdk_private.h"
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+
+class Counter
+{
+private:
+  uint32_t _count;
+public:
+  Counter(uint32_t initial_count)
+  {
+    this->_count = initial_count;
+    printf("Counter initialised with count %d\r\n", initial_count);
+  }
+
+  void Increment()
+  {
+    _count++;
+  }
+
+  uint32_t getCount()
+  {
+    return _count;
+  }
+};
+
+static Counter static_counter(99);
+
+void task1(void *pvParameters)
+{
+  Counter local_counter = Counter(12);
+  Counter *new_counter = new Counter(24);
+  while(1) {
+    Counter *counter = NULL;
+    switch(rand() % 3) {
+    case 0:
+      counter = &local_counter;
+      break;
+    case 1:
+      counter = &static_counter;
+      break;
+    default:
+      counter = new_counter;
+      break;
+    }
+    counter->Increment();
+    printf("local counter %d static counter %d newly allocated counter %d\r\n", local_counter.getCount(),
+	   static_counter.getCount(), new_counter->getCount());
+    vTaskDelay(100);
+  }
+}
+
+extern "C" void user_init(void)
+{
+    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
+    printf("SDK version:%s\n", sdk_system_get_sdk_version());
+    xTaskCreate(task1, (signed char *)"tsk1", 256, NULL, 2, NULL);
+}

extras/cpp_support/component.mk

@@ -0,0 +1,8 @@
+# Component makefile for extras/cpp_support
+INC_DIRS += $(ROOT)extras/cpp_support/include
+
+# args for passing into compile rule generation
+# extras/mqtt-client_INC_DIR =  $(ROOT)extras/mqtt-client
+# extras/mqtt-client_SRC_DIR =  $(ROOT)extras/mqtt-client
+
+# $(eval $(call component_compile_rules,extras/mqtt-client))

extras/cpp_support/include/countdown.hpp

@@ -0,0 +1,102 @@
+/* 
+ * The MIT License (MIT)
+ * 
+ * ESP8266 FreeRTOS Firmware
+ * Copyright (c) 2015 Michael Jacobsen (github.com/mikejac)
+ * 
+ * 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.
+ *
+ * https://github.com/SuperHouse/esp-open-rtos
+ * 
+ */
+
+#ifndef ESP_OPEN_RTOS_TIMER_HPP
+#define	ESP_OPEN_RTOS_TIMER_HPP
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+namespace esp_open_rtos {
+namespace timer {
+
+#define __millis()  (xTaskGetTickCount() * portTICK_RATE_MS)
+
+/******************************************************************************************************************
+ * countdown_t
+ *
+ */
+class countdown_t
+{
+public:
+    /**
+     * 
+     */
+    countdown_t()
+    {  
+	interval_end_ms = 0L;
+    }
+    /**
+     * 
+     * @param ms
+     */
+    countdown_t(int ms)
+    {
+        countdown_ms(ms);   
+    }
+    /**
+     * 
+     * @return 
+     */
+    bool expired()
+    {
+        return (interval_end_ms > 0L) && (__millis() >= interval_end_ms);
+    }
+    /**
+     * 
+     * @param ms
+     */
+    void countdown_ms(unsigned long ms)  
+    {
+        interval_end_ms = __millis() + ms;
+    }
+    /**
+     * 
+     * @param seconds
+     */
+    void countdown(int seconds)
+    {
+        countdown_ms((unsigned long)seconds * 1000L);
+    }
+    /**
+     * 
+     * @return 
+     */
+    int left_ms()
+    {
+        return interval_end_ms - __millis();
+    }
+    
+private:
+    portTickType interval_end_ms;
+};
+
+} // namespace timer {
+} // namespace esp_open_rtos {
+
+#endif

extras/cpp_support/include/mutex.hpp

@@ -0,0 +1,113 @@
+/* 
+ * The MIT License (MIT)
+ * 
+ * ESP8266 FreeRTOS Firmware
+ * Copyright (c) 2015 Michael Jacobsen (github.com/mikejac)
+ * 
+ * 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.
+ *
+ * https://github.com/SuperHouse/esp-open-rtos
+ * 
+ */
+
+#ifndef ESP_OPEN_RTOS_MUTEX_HPP
+#define	ESP_OPEN_RTOS_MUTEX_HPP
+
+#include "semphr.h"
+
+namespace esp_open_rtos {
+namespace thread {
+
+/******************************************************************************************************************
+ * class mutex_t
+ *
+ */
+class mutex_t
+{
+public:
+    /**
+     * 
+     */
+    inline mutex_t()
+    {
+        mutex = 0;
+    }
+    /**
+     * 
+     * @return 
+     */
+    inline int mutex_create()
+    {
+        mutex = xSemaphoreCreateMutex();        
+        
+        if(mutex == NULL) {
+            return -1;
+        }
+        else {
+            return 0;
+        }
+    }
+    /**
+     * 
+     */
+    inline void mutex_destroy()
+    {
+        vQueueDelete(mutex);
+        mutex = 0;
+    }
+    /**
+     * 
+     * @return 
+     */
+    inline int lock()
+    {
+        return (xSemaphoreTake(mutex, portMAX_DELAY) == pdTRUE) ? 0 : -1;
+    }
+    /**
+     * 
+     * @param ms
+     * @return 
+     */
+    inline int try_lock(unsigned long ms)
+    {
+        return (xSemaphoreTake(mutex, ms / portTICK_RATE_MS) == pdTRUE) ? 0 : -1;
+    }
+    /**
+     * 
+     * @return 
+     */
+    inline int unlock()
+    {
+        return (xSemaphoreGive(mutex) == pdTRUE) ? 0 : -1;
+    }
+
+private:
+    xSemaphoreHandle    mutex;
+
+    // Disable copy construction and assignment.
+    mutex_t (const mutex_t&);
+    const mutex_t &operator = (const mutex_t&);
+};
+
+} //namespace thread {
+} //namespace esp_open_rtos {
+
+
+#endif	/* ESP_OPEN_RTOS_MUTEX_HPP */
+

extras/cpp_support/include/queue.hpp

@@ -0,0 +1,124 @@
+/* 
+ * The MIT License (MIT)
+ * 
+ * ESP8266 FreeRTOS Firmware
+ * Copyright (c) 2015 Michael Jacobsen (github.com/mikejac)
+ * 
+ * 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.
+ *
+ * https://github.com/SuperHouse/esp-open-rtos
+ * 
+ */
+
+#ifndef ESP_OPEN_RTOS_QUEUE_HPP
+#define	ESP_OPEN_RTOS_QUEUE_HPP
+
+#include "FreeRTOS.h"
+#include "queue.h"
+
+namespace esp_open_rtos {
+namespace thread {
+
+/******************************************************************************************************************
+ * class queue_t
+ *
+ */
+template<class Data>
+class queue_t
+{
+public:
+    /**
+     * 
+     */
+    inline queue_t()
+    {
+        queue = 0;
+    }
+    /**
+     * 
+     * @param uxQueueLength
+     * @param uxItemSize
+     * @return 
+     */
+    inline int queue_create(unsigned portBASE_TYPE uxQueueLength)
+    {
+        queue = xQueueCreate(uxQueueLength, sizeof(Data));
+        
+        if(queue == NULL) {
+            return -1;
+        }
+        else {
+            return 0;
+        }
+    }
+    /**
+     * 
+     */
+    inline void queue_destroy()
+    {
+        vQueueDelete(queue);
+        queue = 0;
+    }
+    /**
+     * 
+     * @param data
+     * @param ms
+     * @return 
+     */
+    inline int post(const Data& data, unsigned long ms = 0)
+    {
+        return (xQueueSend(queue, &data, ms / portTICK_RATE_MS) == pdTRUE) ? 0 : -1;
+    }
+    /**
+     * 
+     * @param data
+     * @param ms
+     * @return 
+     */
+    inline int receive(Data& data, unsigned long ms = 0)
+    {
+        return (xQueueReceive(queue, &data, ms / portTICK_RATE_MS) == pdTRUE) ? 0 : -1;
+    }
+    /**
+     * 
+     * @param other
+     * @return 
+     */
+    const queue_t &operator = (const queue_t& other)
+    {
+        if(this != &other) {        // protect against invalid self-assignment
+            queue = other.queue;
+        }
+        
+        return *this;
+    }
+
+private:
+    xQueueHandle queue;
+
+    // Disable copy construction.
+    queue_t (const queue_t&);
+};
+
+} //namespace thread {
+} //namespace esp_open_rtos {
+
+
+#endif	/* ESP_OPEN_RTOS_QUEUE_HPP */
+

extras/cpp_support/include/task.hpp

@@ -0,0 +1,106 @@
+/* 
+ * The MIT License (MIT)
+ * 
+ * ESP8266 FreeRTOS Firmware
+ * Copyright (c) 2015 Michael Jacobsen (github.com/mikejac)
+ * 
+ * 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.
+ *
+ * https://github.com/SuperHouse/esp-open-rtos
+ * 
+ */
+
+#ifndef ESP_OPEN_RTOS_TASK_HPP
+#define	ESP_OPEN_RTOS_TASK_HPP
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+namespace esp_open_rtos {
+namespace thread {
+
+/******************************************************************************************************************
+ * task_t
+ *
+ */
+class task_t
+{
+public:
+    /**
+     * 
+     */
+    task_t()
+    {}
+    /**
+     * 
+     * @param pcName
+     * @param usStackDepth
+     * @param uxPriority
+     * @return 
+     */
+    int task_create(const char* const pcName, unsigned short usStackDepth = 256, unsigned portBASE_TYPE uxPriority = 2)
+    {
+        return xTaskCreate(task_t::_task, (signed char *)pcName, usStackDepth, this, uxPriority, NULL);
+    }
+    
+protected:
+    /**
+     * 
+     * @param ms
+     */
+    void sleep(unsigned long ms)
+    {
+        vTaskDelay(ms / portTICK_RATE_MS);
+    }
+    /**
+     * 
+     * @return 
+     */
+    inline unsigned long millis()
+    {
+        return xTaskGetTickCount() * portTICK_RATE_MS;
+    }
+    
+private:
+    /**
+     * 
+     */
+    virtual void task() = 0;
+    /**
+     * 
+     * @param pvParameters
+     */
+    static void _task(void* pvParameters)
+    {
+        if(pvParameters != 0) {
+            ((task_t*)(pvParameters))->task();
+        }
+    }
+    
+    // no copy and no = operator
+    task_t(const task_t&);
+    task_t &operator=(const task_t&);    
+};
+
+} //namespace thread {
+} //namespace esp_open_rtos {
+
+
+#endif	/* ESP_OPEN_RTOS_TASK_HPP */
+

extras/thread/component.mk

@@ -0,0 +1,3 @@
+# Component makefile for extras/thread
+
+INC_DIRS += $(ROOT)extras

extras/timer/component.mk

@@ -0,0 +1,3 @@
+# Component makefile for extras/timer
+
+INC_DIRS += $(ROOT)extras

include/espressif/esp8266/esp8266.h

@@ -6,6 +6,10 @@
 #ifndef __ESP8266_H__
 #define __ESP8266_H__
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 #include "ets_sys.h"
 #include "eagle_soc.h"
 #include "gpio_register.h"
@@ -14,5 +18,9 @@
 #include "timer_register.h"
 #include "uart_register.h"
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif
 

include/espressif/esp_misc.h

@@ -8,6 +8,10 @@
 
 #include "lwip/ip_addr.h"
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 #define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
 
@@ -23,4 +27,8 @@ void sdk_os_delay_us(uint16_t us);
 void sdk_os_install_putc1(void (*p)(char c));
 void sdk_os_putc(char c);
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/esp_softap.h

@@ -6,6 +6,10 @@
 #ifndef __ESP_SOFTAP_H__
 #define __ESP_SOFTAP_H__
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 struct sdk_softap_config {
     uint8_t ssid[32];
     uint8_t password[64];
@@ -20,4 +24,8 @@ struct sdk_softap_config {
 bool sdk_wifi_softap_get_config(struct sdk_softap_config *config);
 bool sdk_wifi_softap_set_config(struct sdk_softap_config *config);
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/esp_sta.h

@@ -10,6 +10,10 @@
 
 #include "queue.h"
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 struct sdk_station_config {
     uint8_t ssid[32];
     uint8_t password[64];
@@ -68,4 +72,8 @@ enum {
 
 uint8_t sdk_wifi_station_get_connect_status(void);
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/esp_system.h

@@ -6,6 +6,10 @@
 #ifndef __ESP_SYSTEM_H__
 #define __ESP_SYSTEM_H__
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 enum sdk_rst_reason {
 	DEFAULT_RST	  = 0,
 	WDT_RST	      = 1,
@@ -54,4 +58,8 @@ bool sdk_system_rtc_mem_write(uint8_t dst, const void *src, uint16_t n);
 
 void sdk_system_uart_swap(void);
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/esp_timer.h

@@ -6,6 +6,10 @@
 #ifndef __ESP_TIMER_H__
 #define __ESP_TIMER_H__
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 /* timer related */
 typedef void sdk_os_timer_func_t(void *timer_arg);
 
@@ -19,4 +23,8 @@ typedef struct _os_timer_t {
     void               *timer_arg;
 } sdk_os_timer_t;
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/esp_wifi.h

@@ -13,6 +13,10 @@
 
 #include <lwip/ip_addr.h>
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 enum {
 	NULL_MODE = 0,
 	STATION_MODE,
@@ -67,7 +71,11 @@ enum sdk_phy_mode {
 	PHY_MODE_11N    = 3
 };
 
-enum phy_mode sdk_wifi_get_phy_mode(void);
+enum sdk_phy_mode sdk_wifi_get_phy_mode(void);
 bool sdk_wifi_set_phy_mode(enum sdk_phy_mode mode);
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/sdk_private.h

@@ -15,6 +15,11 @@
 #define SDK_PRIVATE_H
 
 #include <stdint.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 struct ip_addr;
 
 /*********************************************
@@ -49,4 +54,8 @@ void sdk_system_station_got_ip_set(struct ip_addr *ip_addr, struct ip_addr *sn_m
  */
 void sdk_system_pp_recycle_rx_pkt(void *eb);
 
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

include/espressif/spi_flash.h

@@ -6,6 +6,10 @@
 #ifndef __SPI_FLASH_H__
 #define __SPI_FLASH_H__
 
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
 typedef enum {
     SPI_FLASH_RESULT_OK,
     SPI_FLASH_RESULT_ERR,
@@ -21,6 +25,7 @@ sdk_SpiFlashOpResult sdk_spi_flash_erase_sector(uint16_t sec);
 sdk_SpiFlashOpResult sdk_spi_flash_write(uint32_t des_addr, uint32_t *src_addr, uint32_t size);
 sdk_SpiFlashOpResult sdk_spi_flash_read(uint32_t src_addr, uint32_t *des_addr, uint32_t size);
 
+    
 /* SDK uses this structure internally to account for flash size.
 
    chip_size field is initialised during startup from the flash size
@@ -42,4 +47,9 @@ typedef struct {
 
 extern sdk_flashchip_t sdk_flashchip;
 
+
+#ifdef	__cplusplus
+}
+#endif
+
 #endif

ld/eagle.app.v6.ld

@@ -166,11 +166,14 @@ SECTIONS
     *(.gnu.linkonce.e.*)
     *(.gnu.version_r)
     *(.eh_frame)
+    . = (. + 3) & ~ 3;
     /*  C++ constructor and destructor tables, properly ordered:  */
+    __init_array_start = ABSOLUTE(.);
     KEEP (*crtbegin.o(.ctors))
     KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
     KEEP (*(SORT(.ctors.*)))
     KEEP (*(.ctors))
+    __init_array_end = ABSOLUTE(.);
     KEEP (*crtbegin.o(.dtors))
     KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
     KEEP (*(SORT(.dtors.*)))