1 | /* |
2 | * BlockAIOCB allocation |
3 | * |
4 | * Copyright (c) 2003-2017 Fabrice Bellard and other QEMU contributors |
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 | #include "qemu/osdep.h" |
26 | #include "block/aio.h" |
27 | |
28 | void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs, |
29 | BlockCompletionFunc *cb, void *opaque) |
30 | { |
31 | BlockAIOCB *acb; |
32 | |
33 | acb = g_malloc(aiocb_info->aiocb_size); |
34 | acb->aiocb_info = aiocb_info; |
35 | acb->bs = bs; |
36 | acb->cb = cb; |
37 | acb->opaque = opaque; |
38 | acb->refcnt = 1; |
39 | return acb; |
40 | } |
41 | |
42 | void qemu_aio_ref(void *p) |
43 | { |
44 | BlockAIOCB *acb = p; |
45 | acb->refcnt++; |
46 | } |
47 | |
48 | void qemu_aio_unref(void *p) |
49 | { |
50 | BlockAIOCB *acb = p; |
51 | assert(acb->refcnt > 0); |
52 | if (--acb->refcnt == 0) { |
53 | g_free(acb); |
54 | } |
55 | } |
56 | |