public MessageQueue(int length, string queueName)
{
int cbMessage = Marshal.SizeOf <T>();
if (cbMessage > 8192)
{
throw new ArgumentOutOfRangeException("By default, Linux limits size of queue messages to 8kb");
}
if (length > 10)
{
throw new ArgumentOutOfRangeException("By default, Linux limits the queue to 10 pending messages");
}
int pid = Process.GetCurrentProcess().Id;
string name = $"/{ queueName }.{ pid }";
MessageQueueAttributes mqa = new MessageQueueAttributes()
{
flags = eMessageQueueFlags.NonBlocking,
maxMessages = length,
messageSize = cbMessage
};
int fd = MQ.mq_open(name, queueFlags, eFileAccess.OwnerAllAccess, ref mqa);
if (fd < 0)
{
throw LibC.exception("mq_open", fd);
}
handle = fd;
this.name = name;
}
public void Dispose()
{
if (handle >= 0)
{
int res = MQ.mq_close(handle);
if (res < 0)
{
throw LibC.exception("mq_close", res);
}
res = MQ.mq_unlink(name);
if (res < 0)
{
throw LibC.exception("mq_unlink", res);
}
}
GC.SuppressFinalize(this);
}
public T dequeue() => MQ.mq_receive <T>(handle);
public void enqueue(T message) => MQ.mq_send(handle, message);
