mirror of https://gitee.com/openkylin/qemu.git
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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* BlockAIOCB allocation
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*
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* Copyright (c) 2003-2017 Fabrice Bellard and other QEMU contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "block/aio.h"
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void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs,
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BlockCompletionFunc *cb, void *opaque)
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{
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BlockAIOCB *acb;
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acb = g_malloc(aiocb_info->aiocb_size);
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acb->aiocb_info = aiocb_info;
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acb->bs = bs;
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acb->cb = cb;
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acb->opaque = opaque;
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acb->refcnt = 1;
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return acb;
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}
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void qemu_aio_ref(void *p)
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{
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BlockAIOCB *acb = p;
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acb->refcnt++;
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}
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void qemu_aio_unref(void *p)
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{
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BlockAIOCB *acb = p;
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assert(acb->refcnt > 0);
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if (--acb->refcnt == 0) {
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g_free(acb);
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}
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}
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