git clone git://git.osmocom.org/sdrangelove.git

sdrbase/util/message.cpp

@@ -0,0 +1,79 @@
+#include <QWaitCondition>
+#include <QMutex>
+#include "util/message.h"
+#include "util/messagequeue.h"
+
+const char* Message::m_identifier = "Message";
+
+Message::Message() :
+	m_destination(NULL),
+	m_synchronous(false),
+	m_waitCondition(NULL),
+	m_mutex(NULL),
+	m_complete(0)
+{
+}
+
+Message::~Message()
+{
+	if(m_waitCondition != NULL)
+		delete m_waitCondition;
+	if(m_mutex != NULL)
+		delete m_mutex;
+}
+
+const char* Message::getIdentifier() const
+{
+	return m_identifier;
+}
+
+bool Message::matchIdentifier(const char* identifier) const
+{
+	return m_identifier == identifier;
+}
+
+bool Message::match(Message* message)
+{
+	return message->matchIdentifier(m_identifier);
+}
+
+void Message::submit(MessageQueue* queue, void* destination)
+{
+	m_destination = destination;
+	m_synchronous = false;
+	queue->submit(this);
+}
+
+int Message::execute(MessageQueue* queue, void* destination)
+{
+	m_destination = destination;
+	m_synchronous = true;
+
+	if(m_waitCondition == NULL)
+		m_waitCondition = new QWaitCondition;
+	if(m_mutex == NULL)
+		m_mutex = new QMutex;
+
+	m_mutex->lock();
+	m_complete.testAndSetAcquire(0, 1);
+	queue->submit(this);
+	while(!m_complete.testAndSetAcquire(0, 1))
+		((QWaitCondition*)m_waitCondition)->wait(m_mutex, 100);
+	m_complete = 0;
+	int result = m_result;
+	m_mutex->unlock();
+	return result;
+}
+
+void Message::completed(int result)
+{
+	if(m_synchronous) {
+		m_result = result;
+		m_complete = 0;
+		if(m_waitCondition == NULL)
+			qFatal("wait condition is NULL");
+		m_waitCondition->wakeAll();
+	} else {
+		delete this;
+	}
+}