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vring_poller.h
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vring_poller.h
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/*-
* BSD LICENSE
*
* Copyright (c) Cloudbyte Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Cloudbyte Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _VRING_POLLER_H
#define _VRING_POLLER_H
#include <stdbool.h>
#include "vring.h"
#include "virtio_task.h"
/*
* vring poller is a thread which is responsible for dispatching IO requests
* from input ring buffer to vring in one direction and calling callbacks
* of processed IOs in another direction.
*/
struct vring_poller;
typedef struct vring_poller vring_poller_t;
vring_poller_t *vring_poller_create(vring_t *vring);
void vring_poller_destroy(vring_poller_t *poller);
int vring_poller_start(vring_poller_t *poller);
void vring_poller_stop(vring_poller_t *poller);
int vring_submit_task(vring_poller_t *poller, virtio_task_t *task,
task_cb_t cb, void *ctx);
int vring_submit_task_sync(vring_poller_t *poller, virtio_task_t *task);
#endif