public unsafe IList <ArraySegment <byte> > ReceiveMultipleMessages(IList <ArraySegment <byte> > buffers)
{
if (handle == -1)
{
throw new ObjectDisposedException(objectname);
}
GCHandle[] bufhandles = new GCHandle[buffers.Count];
iovec * iovecs = stackalloc iovec[buffers.Count];
mmsghdr * hdrs = stackalloc mmsghdr[buffers.Count];
for (int i = 0; i < buffers.Count; i++)
{
bufhandles[i] = GCHandle.Alloc(buffers[i].Array, GCHandleType.Pinned);
iovecs[i] = new iovec()
{
iov_base = (byte *)bufhandles[i].AddrOfPinnedObject() + buffers[i].Offset, iov_len = (UIntPtr)(UInt32)buffers[i].Count
};
hdrs[i] = new mmsghdr()
{
msg_hdr = new msghdr()
{
msg_iov = &iovecs[i], msg_iovlen = (UIntPtr)1
}
};
}
int ret = recvmmsg(handle, hdrs, (uint)buffers.Count, MSG_WAITFORONE, null);
for (int i = 0; i < buffers.Count; i++)
{
bufhandles[i].Free();
}
if (ret == -1)
{
throw new PosixException("recvmmsg");
}
ArraySegment <byte>[] retvec = new ArraySegment <byte> [ret];
for (int i = 0; i < ret && i < buffers.Count; i++)
{
retvec[i] = new ArraySegment <byte>(buffers[i].Array, buffers[i].Offset, (int)hdrs[i].msg_len);
}
return(retvec);
}
private static unsafe extern int recvmmsg(int sockfd, mmsghdr *msgvec, UInt32 vlen, int flags, timespec *timeout);
