mirror of
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP
synced 2025-10-24 12:02:37 +08:00
a4124602cc
This commit brings in the refactoring and restructuring changes from IntegrationTesting1 branch to the main branch. It also includes additional unit tests for 100% coverage. The rationale behind not creating a PR is that the conflicts were too huge to be resolved correctly. Thus, a force push to the main branch is being done.
129 lines
5.2 KiB
C
129 lines
5.2 KiB
C
/*
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* FreeRTOS+TCP V2.3.4
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* 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 all
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* 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, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://aws.amazon.com/freertos
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* http://www.FreeRTOS.org
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*/
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/*
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* FreeRTOS_Stream_Buffer.h
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*
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* A circular character buffer
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* An implementation of a circular buffer without a length field
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* If LENGTH defines the size of the buffer, a maximum of (LENGTH-1) bytes can be stored
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* In order to add or read data from the buffer, memcpy() will be called at most 2 times
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*/
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#ifndef FREERTOS_STREAM_BUFFER_H
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#define FREERTOS_STREAM_BUFFER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* structure to store all the details of a stream buffer.
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*/
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typedef struct xSTREAM_BUFFER
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{
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volatile size_t uxTail; /**< next item to read */
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volatile size_t uxMid; /**< iterator within the valid items */
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volatile size_t uxHead; /**< next position store a new item */
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volatile size_t uxFront; /**< iterator within the free space */
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size_t LENGTH; /**< const value: number of reserved elements */
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uint8_t ucArray[ sizeof( size_t ) ]; /**< array big enough to store any pointer address */
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} StreamBuffer_t;
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void vStreamBufferClear( StreamBuffer_t * pxBuffer );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferSpace( const StreamBuffer_t * pxBuffer,
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const size_t uxLower,
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const size_t uxUpper );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferDistance( const StreamBuffer_t * pxBuffer,
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const size_t uxLower,
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const size_t uxUpper );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferGetSpace( const StreamBuffer_t * pxBuffer );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferFrontSpace( const StreamBuffer_t * pxBuffer );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferGetSize( const StreamBuffer_t * pxBuffer );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferMidSpace( const StreamBuffer_t * pxBuffer );
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/*-----------------------------------------------------------*/
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void vStreamBufferMoveMid( StreamBuffer_t * pxBuffer,
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size_t uxCount );
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/*-----------------------------------------------------------*/
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BaseType_t xStreamBufferLessThenEqual( const StreamBuffer_t * pxBuffer,
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const size_t uxLeft,
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const size_t uxRight );
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/*-----------------------------------------------------------*/
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size_t uxStreamBufferGetPtr( StreamBuffer_t * pxBuffer,
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uint8_t ** ppucData );
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/*
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* Add bytes to a stream buffer.
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*
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* pxBuffer - The buffer to which the bytes will be added.
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* uxOffset - If uxOffset > 0, data will be written at an offset from uxHead
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* while uxHead will not be moved yet.
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* pucData - A pointer to the data to be added.
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* uxCount - The number of bytes to add.
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*/
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size_t uxStreamBufferAdd( StreamBuffer_t * pxBuffer,
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size_t uxOffset,
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const uint8_t * pucData,
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size_t uxByteCount );
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/*
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* Read bytes from a stream buffer.
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*
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* pxBuffer - The buffer from which the bytes will be read.
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* uxOffset - Can be used to read data located at a certain offset from 'uxTail'.
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* pucData - A pointer to the buffer into which data will be read.
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* uxMaxCount - The number of bytes to read.
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* xPeek - If set to pdTRUE the data will remain in the buffer.
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*/
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size_t uxStreamBufferGet( StreamBuffer_t * pxBuffer,
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size_t uxOffset,
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uint8_t * pucData,
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size_t uxMaxCount,
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BaseType_t xPeek );
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* !defined( FREERTOS_STREAM_BUFFER_H ) */
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