private void InitializePoll(ProcessorPin pin)
{
lock (polls)
{
PinPoll poll;
if (polls.TryGetValue(pin, out poll))
{
return;
}
var pinPoll = new PinPoll();
pinPoll.PollDescriptor = Interop.epoll_create(1);
if (pinPoll.PollDescriptor < 0)
{
throw new IOException("Call to epoll_create(1) API failed with the following return value: " + pinPoll.PollDescriptor);
}
var valuePath = Path.Combine(gpioPath, string.Format("gpio{0}/value", (int)pin));
pinPoll.FileDescriptor = UnixFile.OpenFileDescriptor(valuePath, UnixFileMode.ReadOnly | UnixFileMode.NonBlocking);
var ev = new Interop.epoll_event
{
events = (Interop.EPOLLIN | Interop.EPOLLET | Interop.EPOLLPRI),
data = new Interop.epoll_data {
fd = pinPoll.FileDescriptor
}
};
pinPoll.InEventPtr = Marshal.AllocHGlobal(64);
Marshal.StructureToPtr(ev, pinPoll.InEventPtr, false);
var controlResult = Interop.epoll_ctl(pinPoll.PollDescriptor, Interop.EPOLL_CTL_ADD, pinPoll.FileDescriptor, pinPoll.InEventPtr);
if (controlResult != 0)
{
throw new IOException("Call to epoll_ctl(EPOLL_CTL_ADD) API failed with the following return value: " + controlResult);
}
pinPoll.OutEventPtr = Marshal.AllocHGlobal(64);
polls[pin] = pinPoll;
}
}
private void InitializePoll(ProcessorPin pin)
{
lock (pinPolls)
{
PinPoll poll;
if (pinPolls.TryGetValue(pin, out poll))
return;
var pinPoll = new PinPoll();
pinPoll.PollDescriptor = Interop.epoll_create(1);
if (pinPoll.PollDescriptor < 0)
throw new IOException("Call to epoll_create(1) API failed with the following return value: " + pinPoll.PollDescriptor);
var valuePath = Path.Combine(gpioPath, string.Format("gpio{0}/value", (int)pin));
pinPoll.FileDescriptor = UnixFile.OpenFileDescriptor(valuePath, UnixFileMode.ReadOnly | UnixFileMode.NonBlocking);
var ev = new Interop.epoll_event
{
events = (Interop.EPOLLIN | Interop.EPOLLET | Interop.EPOLLPRI),
data = new Interop.epoll_data { fd = pinPoll.FileDescriptor }
};
pinPoll.InEventPtr = Marshal.AllocHGlobal(64);
Marshal.StructureToPtr(ev, pinPoll.InEventPtr, false);
var controlResult = Interop.epoll_ctl(pinPoll.PollDescriptor, Interop.EPOLL_CTL_ADD, pinPoll.FileDescriptor, pinPoll.InEventPtr);
if (controlResult != 0)
throw new IOException("Call to epoll_ctl(EPOLL_CTL_ADD) API failed with the following return value: " + controlResult);
pinPoll.OutEventPtr = Marshal.AllocHGlobal(64);
pinPolls[pin] = pinPoll;
}
}
