public unsafe bool TryRegister(int fileDescriptor, SocketAsyncEvents current, SocketAsyncEvents events, GCHandle handle, out Interop.Error error)
{
Debug.Assert(current != events);
int op = Interop.libc.EPOLL_CTL_MOD;
if (current == SocketAsyncEvents.None)
{
// This context was not listening for events, add it
op = Interop.libc.EPOLL_CTL_ADD;
}
else if (events == SocketAsyncEvents.None)
{
// This context will no longer be listening for events, remove it
op = Interop.libc.EPOLL_CTL_DEL;
}
// Register events
var evt = new Interop.libc.epoll_event {
events = GetEPollEvents(events) | Interop.libc.EPOLLET, data = (IntPtr)handle
};
int err = Interop.libc.epoll_ctl(_epollFd, op, fileDescriptor, &evt);
if (err == 0)
{
error = Interop.Error.SUCCESS;
return(true);
}
error = Interop.Sys.GetLastError();
return(false);
}
public bool TryRegister(int fileDescriptor, SocketAsyncEvents current, SocketAsyncEvents events, GCHandle handle, out Interop.Error error)
{
if (current == events)
{
error = Interop.Error.SUCCESS;
return true;
}
return _backend.TryRegister(fileDescriptor, current, events, handle, out error);
}
private static uint GetEPollEvents(SocketAsyncEvents events)
{
return
(((events & SocketAsyncEvents.Read) != 0) ? Interop.libc.EPOLLIN : 0) |
(((events & SocketAsyncEvents.Write) != 0) ? Interop.libc.EPOLLOUT : 0) |
(((events & SocketAsyncEvents.ReadClose) != 0) ? Interop.libc.EPOLLRDHUP : 0) |
(((events & SocketAsyncEvents.Close) != 0) ? Interop.libc.EPOLLHUP : 0) |
(((events & SocketAsyncEvents.Error) != 0) ? Interop.libc.EPOLLERR : 0);
}
public bool TryRegister(int fileDescriptor, SocketAsyncEvents current, SocketAsyncEvents events, GCHandle handle, out Interop.Error error)
{
if (current == events)
{
error = Interop.Error.SUCCESS;
return(true);
}
return(_backend.TryRegister(fileDescriptor, current, events, handle, out error));
}
private static uint GetEPollEvents(SocketAsyncEvents events)
{
return
((((events & SocketAsyncEvents.Read) != 0) ? Interop.libc.EPOLLIN : 0) |
(((events & SocketAsyncEvents.Write) != 0) ? Interop.libc.EPOLLOUT : 0) |
(((events & SocketAsyncEvents.ReadClose) != 0) ? Interop.libc.EPOLLRDHUP : 0) |
(((events & SocketAsyncEvents.Close) != 0) ? Interop.libc.EPOLLHUP : 0) |
(((events & SocketAsyncEvents.Error) != 0) ? Interop.libc.EPOLLERR : 0));
}
public unsafe bool TryRegister(int fileDescriptor, SocketAsyncEvents current, SocketAsyncEvents events, GCHandle handle, out Interop.Error error)
{
const ushort AddFlags = Interop.libc.EV_ADD | Interop.libc.EV_CLEAR | Interop.libc.EV_RECEIPT;
const ushort RemoveFlags = Interop.libc.EV_DELETE | Interop.libc.EV_RECEIPT;
Debug.Assert(current != events);
SocketAsyncEvents changed = current ^ events;
bool readChanged = (changed & SocketAsyncEvents.Read) != 0;
bool writeChanged = (changed & SocketAsyncEvents.Write) != 0;
int evtCount = (readChanged ? 1 : 0) + (writeChanged ? 1 : 0);
var kevents = stackalloc Interop.libc.kevent64_s[evtCount];
int i = 0;
if (readChanged)
{
kevents[0].ident = unchecked ((ulong)fileDescriptor);
kevents[0].filter = Interop.libc.EVFILT_READ;
kevents[0].flags = (events & SocketAsyncEvents.Read) == 0 ? RemoveFlags : AddFlags;
kevents[0].fflags = 0;
kevents[0].data = 0;
kevents[0].udata = (ulong)(IntPtr)handle;
i = 1;
}
if (writeChanged)
{
kevents[i].ident = unchecked ((ulong)fileDescriptor);
kevents[i].filter = Interop.libc.EVFILT_WRITE;
kevents[i].flags = (events & SocketAsyncEvents.Write) == 0 ? RemoveFlags : AddFlags;
kevents[i].fflags = 0;
kevents[i].data = 0;
kevents[i].udata = (ulong)(IntPtr)handle;
}
int err = Interop.libc.kevent64(_kqueueFd, kevents, evtCount, null, 0, 0, null);
if (err == 0)
{
error = Interop.Error.SUCCESS;
return(true);
}
error = Interop.Sys.GetLastError();
return(false);
}
public unsafe bool TryRegister(int fileDescriptor, SocketAsyncEvents current, SocketAsyncEvents events, GCHandle handle, out Interop.Error error)
{
Debug.Assert(current != events);
int op = Interop.libc.EPOLL_CTL_MOD;
if (current == SocketAsyncEvents.None)
{
// This context was not listening for events, add it
op = Interop.libc.EPOLL_CTL_ADD;
}
else if (events == SocketAsyncEvents.None)
{
// This context will no longer be listening for events, remove it
op = Interop.libc.EPOLL_CTL_DEL;
}
// Register events
var evt = new Interop.libc.epoll_event { events = GetEPollEvents(events) | Interop.libc.EPOLLET, data = (IntPtr)handle };
int err = Interop.libc.epoll_ctl(_epollFd, op, fileDescriptor, &evt);
if (err == 0)
{
error = Interop.Error.SUCCESS;
return true;
}
error = Interop.Sys.GetLastError();
return false;
}
public unsafe bool TryRegister(int fileDescriptor, SocketAsyncEvents current, SocketAsyncEvents events, GCHandle handle, out Interop.Error error)
{
const ushort AddFlags = Interop.libc.EV_ADD | Interop.libc.EV_CLEAR | Interop.libc.EV_RECEIPT;
const ushort RemoveFlags = Interop.libc.EV_DELETE | Interop.libc.EV_RECEIPT;
Debug.Assert(current != events);
SocketAsyncEvents changed = current ^ events;
bool readChanged = (changed & SocketAsyncEvents.Read) != 0;
bool writeChanged = (changed & SocketAsyncEvents.Write) != 0;
int evtCount = (readChanged ? 1 : 0) + (writeChanged ? 1 : 0);
var kevents = stackalloc Interop.libc.kevent64_s[evtCount];
int i = 0;
if (readChanged)
{
kevents[0].ident = unchecked((ulong)fileDescriptor);
kevents[0].filter = Interop.libc.EVFILT_READ;
kevents[0].flags = (events & SocketAsyncEvents.Read) == 0 ? RemoveFlags : AddFlags;
kevents[0].fflags = 0;
kevents[0].data = 0;
kevents[0].udata = (ulong)(IntPtr)handle;
i = 1;
}
if (writeChanged)
{
kevents[i].ident = unchecked((ulong)fileDescriptor);
kevents[i].filter = Interop.libc.EVFILT_WRITE;
kevents[i].flags = (events & SocketAsyncEvents.Write) == 0 ? RemoveFlags : AddFlags;
kevents[i].fflags = 0;
kevents[i].data = 0;
kevents[i].udata = (ulong)(IntPtr)handle;
}
int err = Interop.libc.kevent64(_kqueueFd, kevents, evtCount, null, 0, 0, null);
if (err == 0)
{
error = Interop.Error.SUCCESS;
return true;
}
error = Interop.Sys.GetLastError();
return false;
}
