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sdrangel/sdrbase/util/message.cpp

80 lines
1.5 KiB
C++

#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;
}
}