35e60bfdbc
Add basic flow control to stream. A stream slave may return short, indicating that it is not capable of accepting any more data at the present time. Polling or a callback can be used via the can_push() function to determine when the slave can receive again. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
33 lines
757 B
C
33 lines
757 B
C
#include "hw/stream.h"
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size_t
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stream_push(StreamSlave *sink, uint8_t *buf, size_t len, uint32_t *app)
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{
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StreamSlaveClass *k = STREAM_SLAVE_GET_CLASS(sink);
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return k->push(sink, buf, len, app);
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}
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bool
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stream_can_push(StreamSlave *sink, StreamCanPushNotifyFn notify,
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void *notify_opaque)
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{
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StreamSlaveClass *k = STREAM_SLAVE_GET_CLASS(sink);
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return k->can_push ? k->can_push(sink, notify, notify_opaque) : true;
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}
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static const TypeInfo stream_slave_info = {
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.name = TYPE_STREAM_SLAVE,
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.parent = TYPE_INTERFACE,
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.class_size = sizeof(StreamSlaveClass),
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};
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static void stream_slave_register_types(void)
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{
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type_register_static(&stream_slave_info);
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}
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type_init(stream_slave_register_types)
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