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* io: add methods to set I/O handlers on AioContextPaolo Bonzini2017-02-211-0/+6
| | | | | | | | | | | | This is in preparation for making qio_channel_yield work on AioContexts other than the main one. Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 20170213135235.12274-6-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* io: implement socket watch for win32 using WSAEventSelect+selectPaolo Bonzini2016-03-101-1/+125
| | | | | | | | | | | | | On Win32 we cannot directly poll on socket handles. Instead we create a Win32 event object and associate the socket handle with the event. When the event signals readyness we then have to use select to determine which events are ready. Creating Win32 events is moderately heavyweight, so we don't want todo it every time we create a GSource, so this associates a single event with a QIOChannel. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
* io: introduce qio_channel_create_socket_watchPaolo Bonzini2016-03-101-0/+15
| | | | | | | | Sockets are not in the same namespace as file descriptors on Windows. As an initial step, introduce separate APIs for file descriptor and socket watches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* io: pass HANDLE to g_source_add_poll on Win32Paolo Bonzini2016-03-101-2/+11
| | | | | Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* io: Clean up includesPeter Maydell2016-02-041-0/+1
| | | | | | | | | | Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-14-git-send-email-peter.maydell@linaro.org
* io: add helper module for creating watches on FDsDaniel P. Berrange2015-12-181-0/+198
A number of the channel implementations will require the ability to create watches on file descriptors / sockets. To avoid duplicating this code in each channel, provide a helper API for dealing with file descriptor watches. There are two watch implementations provided. The first is useful for bi-directional file descriptors such as sockets, regular files, character devices, etc. The second works with a pair of unidirectional file descriptors such as pipes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>