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#ifndef STREAM_H
#define STREAM_H
#include "qom/object.h"
#define TYPE_STREAM_SINK "stream-sink"
typedef struct StreamSinkClass StreamSinkClass;
DECLARE_CLASS_CHECKERS(StreamSinkClass, STREAM_SINK,
TYPE_STREAM_SINK)
#define STREAM_SINK(obj) \
INTERFACE_CHECK(StreamSink, (obj), TYPE_STREAM_SINK)
typedef struct StreamSink StreamSink;
typedef void (*StreamCanPushNotifyFn)(void *opaque);
struct StreamSinkClass {
InterfaceClass parent;
/**
* can push - determine if a stream sink is capable of accepting at least
* one byte of data. Returns false if cannot accept. If not implemented, the
* sink is assumed to always be capable of receiving.
* @notify: Optional callback that the sink will call when the sink is
* capable of receiving again. Only called if false is returned.
* @notify_opaque: opaque data to pass to notify call.
*/
bool (*can_push)(StreamSink *obj, StreamCanPushNotifyFn notify,
void *notify_opaque);
/**
* push - push data to a Stream sink. The number of bytes pushed is
* returned. If the sink short returns, the master must wait before trying
* again, the sink may continue to just return 0 waiting for the vm time to
* advance. The can_push() function can be used to trap the point in time
* where the sink is ready to receive again, otherwise polling on a QEMU
* timer will work.
* @obj: Stream sink to push to
* @buf: Data to write
* @len: Maximum number of bytes to write
* @eop: End of packet flag
*/
size_t (*push)(StreamSink *obj, unsigned char *buf, size_t len, bool eop);
};
size_t
stream_push(StreamSink *sink, uint8_t *buf, size_t len, bool eop);
bool
stream_can_push(StreamSink *sink, StreamCanPushNotifyFn notify,
void *notify_opaque);
#endif /* STREAM_H */
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