a8d2532645
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
55 lines
2 KiB
C
55 lines
2 KiB
C
#ifndef STREAM_H
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#define STREAM_H
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#include "qom/object.h"
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/* stream slave. Used until qdev provides a generic way. */
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#define TYPE_STREAM_SLAVE "stream-slave"
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#define STREAM_SLAVE_CLASS(klass) \
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OBJECT_CLASS_CHECK(StreamSlaveClass, (klass), TYPE_STREAM_SLAVE)
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#define STREAM_SLAVE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(StreamSlaveClass, (obj), TYPE_STREAM_SLAVE)
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#define STREAM_SLAVE(obj) \
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INTERFACE_CHECK(StreamSlave, (obj), TYPE_STREAM_SLAVE)
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typedef struct StreamSlave StreamSlave;
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typedef void (*StreamCanPushNotifyFn)(void *opaque);
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typedef struct StreamSlaveClass {
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InterfaceClass parent;
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/**
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* can push - determine if a stream slave is capable of accepting at least
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* one byte of data. Returns false if cannot accept. If not implemented, the
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* slave is assumed to always be capable of receiving.
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* @notify: Optional callback that the slave will call when the slave is
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* capable of receiving again. Only called if false is returned.
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* @notify_opaque: opaque data to pass to notify call.
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*/
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bool (*can_push)(StreamSlave *obj, StreamCanPushNotifyFn notify,
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void *notify_opaque);
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/**
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* push - push data to a Stream slave. The number of bytes pushed is
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* returned. If the slave short returns, the master must wait before trying
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* again, the slave may continue to just return 0 waiting for the vm time to
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* advance. The can_push() function can be used to trap the point in time
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* where the slave is ready to receive again, otherwise polling on a QEMU
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* timer will work.
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* @obj: Stream slave to push to
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* @buf: Data to write
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* @len: Maximum number of bytes to write
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*/
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size_t (*push)(StreamSlave *obj, unsigned char *buf, size_t len);
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} StreamSlaveClass;
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size_t
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stream_push(StreamSlave *sink, uint8_t *buf, size_t len);
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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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#endif /* STREAM_H */
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