1 /*
2 * Block coroutine wrapping core, used by auto-generated block/block-gen.c
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2020 Virtuozzo International GmbH
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #ifndef BLOCK_BLOCK_GEN_H
27 #define BLOCK_BLOCK_GEN_H
28
29 #include "block/block_int.h"
30
31 /* Base structure for argument packing structures */
32 typedef struct BdrvPollCo {
33 AioContext *ctx;
34 bool in_progress;
35 Coroutine *co; /* Keep pointer here for debugging */
36 } BdrvPollCo;
37
bdrv_poll_co(BdrvPollCo * s)38 static inline void bdrv_poll_co(BdrvPollCo *s)
39 {
40 assert(!qemu_in_coroutine());
41
42 aio_co_enter(s->ctx, s->co);
43 AIO_WAIT_WHILE(s->ctx, s->in_progress);
44 }
45
46 #endif /* BLOCK_BLOCK_GEN_H */
47