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io: add methods to set I/O handlers on AioContext

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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>
This commit is contained in:
Paolo Bonzini 2017-02-13 14:52:22 +01:00 • committed by Stefan Hajnoczi
parent 934ebf48c0
commit bf88c1247f
7 changed files with 89 additions and 5 deletions
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25
include/io/channel.h
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@ -23,6 +23,7 @@
#include "qemu-common.h"
#include "qom/object.h"
#include "block/aio.h"
#define TYPE_QIO_CHANNEL "qio-channel"
#define QIO_CHANNEL(obj) \
@ -132,6 +133,11 @@ struct QIOChannelClass {
off_t offset,
int whence,
Error **errp);
void (*io_set_aio_fd_handler)(QIOChannel *ioc,
AioContext *ctx,
IOHandler *io_read,
IOHandler *io_write,
void *opaque);
};
/* General I/O handling functions */
@ -525,4 +531,23 @@ void qio_channel_yield(QIOChannel *ioc,
void qio_channel_wait(QIOChannel *ioc,
GIOCondition condition);
/**
* qio_channel_set_aio_fd_handler:
* @ioc: the channel object
* @ctx: the AioContext to set the handlers on
* @io_read: the read handler
* @io_write: the write handler
* @opaque: the opaque value passed to the handler
*
* This is used internally by qio_channel_yield(). It can
* be used by channel implementations to forward the handlers
* to another channel (e.g. from #QIOChannelTLS to the
* underlying socket).
*/
void qio_channel_set_aio_fd_handler(QIOChannel *ioc,
AioContext *ctx,
IOHandler *io_read,
IOHandler *io_write,
void *opaque);
#endif /* QIO_CHANNEL_H */