Thread rework to support watchdog restarting

include/sta/rtos/handle.hpp

@@ -60,7 +60,7 @@ namespace sta
 		/**
 		 * @brief Access handle value.
 		 *
-		 * If the deferred ctor was used the handle value is
+		 * If the deferred constructor was used the handle value is
 		 * evaluated on the first call to this method.
 		 *
 		 * @return Handle value

include/sta/rtos/thread.hpp

@@ -2,7 +2,6 @@
 #define STA_RTOS_THREAD_HPP
 
 #include <sta/rtos/defs.hpp>
-#include <sta/rtos/handle.hpp>
 
 #include <cmsis_os2.h>
 
@@ -73,15 +72,30 @@ namespace sta
 	class RtosThread
 	{
 	public:
-		using Handle = RtosHandle<osThreadId_t>;    /**< Thread handle type */
-
-	public:
-		RtosThread();
+		/**
+		 * @brief Create an RtosThread.
+		 * 
+		 * @param name The thread's name. Will be used for debugging.
+		 * @param prio The thread's priority.
+		 */
+		RtosThread(const char* name, osPriority_t prio);
 
 		/**
-		 * @param handle Thread handle
+		 * @brief Get the currently running instance.
+		 * 
+		 * @return The currently running instance id.
 		 */
-		RtosThread(const Handle & handle);
+		osThreadId_t getInstance();
+
+		/**
+		 * @brief Get the name of this thread.
+		 */
+		const char* getName() const;
+
+		/**
+		 * @brief Start the execution of this thread.
+		 */
+		void start();
 
 		/**
 		 * @brief Sets the thread to BLOCKED for a given number of ticks. 
@@ -117,23 +131,6 @@ namespace sta
 		 */
 		uint32_t clear(uint32_t flags);
 
-		/**
-		 * @brief Send termination request to thread.
-		 */
-		void requestTermination();
-
-		/**
-		 * @brief Clear the termination request flag for this thread.
-		 */
-		void deleteTerminationRequest();
-
-		/**
-		 * @brief Resets the terminate bool to false.
-		 *
-		 * @return Returns the previous value of this variable.
-		 */
-		bool isTerminationRequested();
-
 		/**
 		 * @brief Forcibly terminate thread.
 		 */
@@ -145,22 +142,22 @@ namespace sta
 		 * @param flags     System flags
 		 */
 		void sysNotify(uint32_t flags);
+	protected:
+		/**
+		 * @brief A function that wraps this task's functionality.
+		 */
+		virtual void loop() = 0;
 
 	private:
-		Handle handle_;
-		bool terminate_;
+		/**
+		 * @brief Static function to pass to RTOS to run as a thread. Calls the loop function implemented here.
+		 */
+		static void entry_point(void* arg);
+
+	private:
+		osThreadId_t instance_;
+		osThreadAttr_t attribs_;
 	};
 } // namespace sta
 
-
-/**
- * @brief Create RtosThread wrapper object for thread handle.
- *
- * @param name Thread name
- */
-#define STA_RTOS_THREAD_WRAPPER(name) \
-	extern osThreadId_t name ## Handle; \
-	sta::RtosThread name ## Thread = sta::RtosThread(sta::RtosThread::Handle::Deferred(&name ## Handle));
-
-
 #endif // STA_RTOS_THREAD_HPP

src/thread.cpp

@@ -1,5 +1,5 @@
 #include <sta/rtos/thread.hpp>
-
+#include <sta/debug/assert.hpp>
 
 #define IS_THREAD_SYS_FLAGS(flags)	( ( flags & STA_RTOS_THREAD_FLAGS_VALID_SYS_BITS ) == flags )
 #define IS_THREAD_USER_FLAGS(flags)	( ( flags & STA_RTOS_THREAD_FLAGS_VALID_USER_BITS ) == flags )
@@ -7,35 +7,64 @@
 
 namespace sta
 {
-	RtosThread::RtosThread()
-		: handle_(nullptr),
-		  terminate_{false}
+	RtosThread::RtosThread(const char* name, osPriority_t prio)
+		: instance_{NULL},
+		  attribs_{ .name = name, .priority = prio }
 	{}
 
-	RtosThread::RtosThread(const Handle & handle)
-		: handle_{handle},
-		  terminate_{false}
-	{}
+	osThreadId_t RtosThread::getInstance()
+	{
+		return instance_;
+	}
+
+	const char* RtosThread::getName() const
+	{
+		return attribs_.name;
+	}
+
+	void RtosThread::start()
+	{
+		// Check if there is no instance that is currently running.
+		STA_ASSERT(instance_ != NULL);
+
+		instance_ = osThreadNew(entry_point, this, &attribs_);
+		STA_ASSERT(instance_ != NULL);
+
+		// Send a thread start signal.
+		sysNotify(STA_RTOS_THREAD_FLAG_START);
+	}
+
+	void RtosThread::entry_point(void* arg)
+	{
+		STA_ASSERT(arg != nullptr);
+
+		RtosThread* instance = reinterpret_cast<RtosThread*>(arg) ;
+		instance->loop();
+	}
 
 	void RtosThread::sleep(uint32_t ticks)
 	{
+		// Make sure that the calling thread is this thread. If not, the
+		// developer very likely has made a mistake. 
+		STA_ASSERT(osThreadGetId() == instance_);
+
 		osDelay(ticks);
 	}
 
 	void RtosThread::notify(uint32_t flags)
 	{
-		STA_ASSERT(handle_.get() != nullptr);
+		STA_ASSERT(instance_ != NULL);
 		STA_ASSERT_MSG(IS_THREAD_USER_FLAGS(flags), "Only user flags allowed");
 
-		osThreadFlagsSet(handle_.get(), flags);
+		osThreadFlagsSet(instance_, flags);
 	}
 
 	void RtosThread::sysNotify(uint32_t flags)
 	{
-		STA_ASSERT(handle_.get() != nullptr);
+		STA_ASSERT(instance_ != NULL);
 		STA_ASSERT_MSG(IS_THREAD_SYS_FLAGS(flags), "Only system flags allowed");
 
-		uint32_t rslt = osThreadFlagsSet(handle_.get(), flags);
+		uint32_t rslt = osThreadFlagsSet(instance_, flags);
 
 		STA_ASSERT_MSG(rslt != osFlagsErrorUnknown, "Unknown thread flag error.");
 		STA_ASSERT_MSG(rslt != osFlagsErrorParameter, "Parameter thread_id is not a valid thread or flags has highest bit set.");
@@ -44,11 +73,19 @@ namespace sta
 
 	uint32_t RtosThread::wait(uint32_t flags)
 	{
+		// Make sure that the calling thread is this thread. If not, the
+		// developer very likely has made a mistake. 
+		STA_ASSERT(osThreadGetId() == instance_);
+
 		return osThreadFlagsWait(flags, osFlagsWaitAny, osWaitForever);
 	}
 
 	uint32_t RtosThread::clear(uint32_t flags)
 	{
+		// Make sure that the calling thread is this thread. If not, the
+		// developer very likely has made a mistake. 
+		STA_ASSERT(osThreadGetId() == instance_);
+
 		uint32_t setFlags = osThreadFlagsClear(flags);
 
 		STA_ASSERT(setFlags != (uint32_t)osError);
@@ -58,29 +95,17 @@ namespace sta
 
 	uint32_t RtosThread::getFlags()
 	{
-		STA_ASSERT(handle_.get() != nullptr);
+		// Make sure that the calling thread is this thread. If not, the
+		// developer very likely has made a mistake. 
+		STA_ASSERT(osThreadGetId() == instance_);
 
 		return osThreadFlagsGet();
 	}
 
-	void RtosThread::requestTermination()
-	{
-		terminate_ = true;
-	}
-
-	void RtosThread::deleteTerminationRequest()
-	{
-		terminate_ = false;
-	}
-
-	bool RtosThread::isTerminationRequested()
-	{
-		return terminate_;
-	}
-
 	void RtosThread::kill()
 	{
-		STA_ASSERT(handle_.get() != nullptr);
-		osThreadTerminate(handle_.get());
+		STA_ASSERT(instance_ != NULL);
+		osThreadTerminate(instance_);
+		instance_ = NULL;
 	}
 } // namespace sta