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 */ 55