mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
![]() Add flags to io_writev and introduce io_flush as optional callback to QIOChannelClass, allowing the implementation of zero copy writes by subclasses. How to use them: - Write data using qio_channel_writev*(...,QIO_CHANNEL_WRITE_FLAG_ZERO_COPY), - Wait write completion with qio_channel_flush(). Notes: As some zero copy write implementations work asynchronously, it's recommended to keep the write buffer untouched until the return of qio_channel_flush(), to avoid the risk of sending an updated buffer instead of the buffer state during write. As io_flush callback is optional, if a subclass does not implement it, then: - io_flush will return 0 without changing anything. Also, some functions like qio_channel_writev_full_all() were adapted to receive a flag parameter. That allows shared code between zero copy and non-zero copy writev, and also an easier implementation on new flags. Signed-off-by: Leonardo Bras <leobras@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20220513062836.965425-3-leobras@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> |
||
---|---|---|
.. | ||
baum.c | ||
char-console.c | ||
char-fd.c | ||
char-fe.c | ||
char-file.c | ||
char-io.c | ||
char-mux.c | ||
char-null.c | ||
char-parallel.c | ||
char-pipe.c | ||
char-pty.c | ||
char-ringbuf.c | ||
char-serial.c | ||
char-socket.c | ||
char-stdio.c | ||
char-udp.c | ||
char-win-stdio.c | ||
char-win.c | ||
char.c | ||
chardev-internal.h | ||
meson.build | ||
msmouse.c | ||
spice.c | ||
testdev.c | ||
trace-events | ||
trace.h | ||
wctablet.c |