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更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
los_seq_buf.h
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/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __LOS_SEQ_BUF_H__
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#define __LOS_SEQ_BUF_H__
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#include "stdarg.h"
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#include "stddef.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern
"C"
{
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#endif
/* __cplusplus */
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#endif
/* __cplusplus */
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#define SEQBUF_PAGE_SIZE 4096
//4K 一页
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#define SEQBUF_LIMIT_SIZE (256 * SEQBUF_PAGE_SIZE)
//缓冲区最大空间为1M
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//序列化BUF
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struct
SeqBuf
{
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char
*
buf
;
//内容
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size_t
size
;
//buf大小
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size_t
count
;
//当前位置
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void
*
private
;
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};
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struct
SeqBuf
*
LosBufCreat
(
void
);
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int
LosBufPrintf
(
struct
SeqBuf
*seqBuf,
const
char
*fmt, ...);
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int
LosBufVprintf
(
struct
SeqBuf
*seqBuf,
const
char
*fmt, va_list argList);
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int
LosBufRelease
(
struct
SeqBuf
*seqBuf);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif
/* __cplusplus */
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#endif
/* __cplusplus */
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#endif
LosBufRelease
int LosBufRelease(struct SeqBuf *seqBuf)
释放 seq buf
Definition:
los_seq_buf.c:145
LosBufPrintf
int LosBufPrintf(struct SeqBuf *seqBuf, const char *fmt,...)
支持可变参数 写 buf
Definition:
los_seq_buf.c:133
LosBufCreat
struct SeqBuf * LosBufCreat(void)
创建seq buf
Definition:
los_seq_buf.c:76
LosBufVprintf
int LosBufVprintf(struct SeqBuf *seqBuf, const char *fmt, va_list argList)
真正写 buf 函数,调整 size/count的值,count可理解为偏移位
Definition:
los_seq_buf.c:90
SeqBuf
Definition:
los_seq_buf.h:48
SeqBuf::size
size_t size
Definition:
los_seq_buf.h:50
SeqBuf::buf
char * buf
Definition:
los_seq_buf.h:49
SeqBuf::count
size_t count
Definition:
los_seq_buf.h:51
lib
libscrew
include
los_seq_buf.h
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