added semaphore implementations

osal/FreeRTOS/CountingSemaphore.cpp

@@ -0,0 +1,43 @@
+#include <framework/osal/FreeRTOS/CountingSemaphore.h>
+#include <framework/serviceinterface/ServiceInterfaceStream.h>
+#include <framework/osal/FreeRTOS/TaskManagement.h>
+
+#include <freertos/semphr.h>
+
+// Make sure #define configUSE_COUNTING_SEMAPHORES 1 is set in
+// free FreeRTOSConfig.h file.
+CountingSemaphore::CountingSemaphore(const uint8_t maxCount, uint8_t initCount):
+		maxCount(maxCount), initCount(initCount) {
+	if(initCount > maxCount) {
+		sif::error << "CountingSemaphoreUsingTask: Max count bigger than "
+				"intial cout. Setting initial count to max count." << std::endl;
+		initCount = maxCount;
+	}
+
+	handle = xSemaphoreCreateCounting(maxCount, initCount);
+	if(handle == nullptr) {
+		sif::error << "CountingSemaphore: Creation failure" << std::endl;
+	}
+}
+
+CountingSemaphore::CountingSemaphore(CountingSemaphore&& other):
+		maxCount(other.maxCount), initCount(other.initCount) {
+	handle = xSemaphoreCreateCounting(other.maxCount, other.initCount);
+	if(handle == nullptr) {
+		sif::error << "CountingSemaphore: Creation failure" << std::endl;
+	}
+}
+
+CountingSemaphore& CountingSemaphore::operator =(
+		CountingSemaphore&& other) {
+	handle = xSemaphoreCreateCounting(other.maxCount, other.initCount);
+	if(handle == nullptr) {
+		sif::error << "CountingSemaphore: Creation failure" << std::endl;
+	}
+	return * this;
+}
+
+
+uint8_t CountingSemaphore::getMaxCount() const {
+	return maxCount;
+}