[qemu.git] / include / block / aio_task.h

/*
 * Aio tasks loops
 *
 * Copyright (c) 2019 Virtuozzo International GmbH.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef BLOCK_AIO_TASK_H
#define BLOCK_AIO_TASK_H

#include "qemu/coroutine.h"

typedef struct AioTaskPool AioTaskPool;
typedef struct AioTask AioTask;
typedef int coroutine_fn (*AioTaskFunc)(AioTask *task);
struct AioTask {
    AioTaskPool *pool;
    AioTaskFunc func;
    int ret;
};

AioTaskPool *coroutine_fn aio_task_pool_new(int max_busy_tasks);
void aio_task_pool_free(AioTaskPool *);

/* error code of failed task or 0 if all is OK */
int aio_task_pool_status(AioTaskPool *pool);

bool aio_task_pool_empty(AioTaskPool *pool);

/* User provides filled @task, however task->pool will be set automatically */
void coroutine_fn aio_task_pool_start_task(AioTaskPool *pool, AioTask *task);

void coroutine_fn aio_task_pool_wait_slot(AioTaskPool *pool);
void coroutine_fn aio_task_pool_wait_one(AioTaskPool *pool);
void coroutine_fn aio_task_pool_wait_all(AioTaskPool *pool);

#endif /* BLOCK_AIO_TASK_H */
Commit	Line	Data
6e9b225f VSO	1	/*
	2	* Aio tasks loops
	3	*
	4	* Copyright (c) 2019 Virtuozzo International GmbH.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24
	25	#ifndef BLOCK_AIO_TASK_H
	26	#define BLOCK_AIO_TASK_H
	27
	28	#include "qemu/coroutine.h"
	29
	30	typedef struct AioTaskPool AioTaskPool;
	31	typedef struct AioTask AioTask;
	32	typedef int coroutine_fn (AioTaskFunc)(AioTask task);
	33	struct AioTask {
	34	AioTaskPool *pool;
	35	AioTaskFunc func;
	36	int ret;
	37	};
	38
	39	AioTaskPool *coroutine_fn aio_task_pool_new(int max_busy_tasks);
	40	void aio_task_pool_free(AioTaskPool *);
	41
	42	/* error code of failed task or 0 if all is OK */
	43	int aio_task_pool_status(AioTaskPool *pool);
	44
	45	bool aio_task_pool_empty(AioTaskPool *pool);
	46
	47	/* User provides filled @task, however task->pool will be set automatically */
	48	void coroutine_fn aio_task_pool_start_task(AioTaskPool pool, AioTask task);
	49
	50	void coroutine_fn aio_task_pool_wait_slot(AioTaskPool *pool);
	51	void coroutine_fn aio_task_pool_wait_one(AioTaskPool *pool);
	52	void coroutine_fn aio_task_pool_wait_all(AioTaskPool *pool);
	53
	54	#endif /* BLOCK_AIO_TASK_H */