1*c2b38b27SPaolo Bonzini /*
2*c2b38b27SPaolo Bonzini * BlockAIOCB allocation
3*c2b38b27SPaolo Bonzini *
4*c2b38b27SPaolo Bonzini * Copyright (c) 2003-2017 Fabrice Bellard and other QEMU contributors
5*c2b38b27SPaolo Bonzini *
6*c2b38b27SPaolo Bonzini * Permission is hereby granted, free of charge, to any person obtaining a copy
7*c2b38b27SPaolo Bonzini * of this software and associated documentation files (the "Software"), to deal
8*c2b38b27SPaolo Bonzini * in the Software without restriction, including without limitation the rights
9*c2b38b27SPaolo Bonzini * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10*c2b38b27SPaolo Bonzini * copies of the Software, and to permit persons to whom the Software is
11*c2b38b27SPaolo Bonzini * furnished to do so, subject to the following conditions:
12*c2b38b27SPaolo Bonzini *
13*c2b38b27SPaolo Bonzini * The above copyright notice and this permission notice shall be included in
14*c2b38b27SPaolo Bonzini * all copies or substantial portions of the Software.
15*c2b38b27SPaolo Bonzini *
16*c2b38b27SPaolo Bonzini * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17*c2b38b27SPaolo Bonzini * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18*c2b38b27SPaolo Bonzini * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19*c2b38b27SPaolo Bonzini * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20*c2b38b27SPaolo Bonzini * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21*c2b38b27SPaolo Bonzini * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22*c2b38b27SPaolo Bonzini * THE SOFTWARE.
23*c2b38b27SPaolo Bonzini */
24*c2b38b27SPaolo Bonzini
25*c2b38b27SPaolo Bonzini #include "qemu/osdep.h"
26*c2b38b27SPaolo Bonzini #include "block/aio.h"
27*c2b38b27SPaolo Bonzini
qemu_aio_get(const AIOCBInfo * aiocb_info,BlockDriverState * bs,BlockCompletionFunc * cb,void * opaque)28*c2b38b27SPaolo Bonzini void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs,
29*c2b38b27SPaolo Bonzini BlockCompletionFunc *cb, void *opaque)
30*c2b38b27SPaolo Bonzini {
31*c2b38b27SPaolo Bonzini BlockAIOCB *acb;
32*c2b38b27SPaolo Bonzini
33*c2b38b27SPaolo Bonzini acb = g_malloc(aiocb_info->aiocb_size);
34*c2b38b27SPaolo Bonzini acb->aiocb_info = aiocb_info;
35*c2b38b27SPaolo Bonzini acb->bs = bs;
36*c2b38b27SPaolo Bonzini acb->cb = cb;
37*c2b38b27SPaolo Bonzini acb->opaque = opaque;
38*c2b38b27SPaolo Bonzini acb->refcnt = 1;
39*c2b38b27SPaolo Bonzini return acb;
40*c2b38b27SPaolo Bonzini }
41*c2b38b27SPaolo Bonzini
qemu_aio_ref(void * p)42*c2b38b27SPaolo Bonzini void qemu_aio_ref(void *p)
43*c2b38b27SPaolo Bonzini {
44*c2b38b27SPaolo Bonzini BlockAIOCB *acb = p;
45*c2b38b27SPaolo Bonzini acb->refcnt++;
46*c2b38b27SPaolo Bonzini }
47*c2b38b27SPaolo Bonzini
qemu_aio_unref(void * p)48*c2b38b27SPaolo Bonzini void qemu_aio_unref(void *p)
49*c2b38b27SPaolo Bonzini {
50*c2b38b27SPaolo Bonzini BlockAIOCB *acb = p;
51*c2b38b27SPaolo Bonzini assert(acb->refcnt > 0);
52*c2b38b27SPaolo Bonzini if (--acb->refcnt == 0) {
53*c2b38b27SPaolo Bonzini g_free(acb);
54*c2b38b27SPaolo Bonzini }
55*c2b38b27SPaolo Bonzini }
56