mirror of https://gitee.com/openkylin/qemu.git
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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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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#ifndef QEMU_FILE_INTERNAL_H
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#define QEMU_FILE_INTERNAL_H 1
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#include "qemu-common.h"
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#include "qemu/iov.h"
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#define IO_BUF_SIZE 32768
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#define MAX_IOV_SIZE MIN(IOV_MAX, 64)
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struct QEMUFile {
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const QEMUFileOps *ops;
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void *opaque;
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int64_t bytes_xfer;
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int64_t xfer_limit;
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int64_t pos; /* start of buffer when writing, end of buffer
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when reading */
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int buf_index;
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int buf_size; /* 0 when writing */
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uint8_t buf[IO_BUF_SIZE];
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struct iovec iov[MAX_IOV_SIZE];
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unsigned int iovcnt;
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int last_error;
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};
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#endif
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