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94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
4 years ago
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file nullstreams.c
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* @brief Null streams code.
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*
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* @addtogroup HAL_NULL_STREAMS
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* @details A null streams.
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* @{
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*/
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#include "hal.h"
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#include "nullstreams.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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static size_t writes(void *ip, const uint8_t *bp, size_t n) {
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(void)ip;
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(void)bp;
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return n;
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}
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static size_t reads(void *ip, uint8_t *bp, size_t n) {
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(void)ip;
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(void)bp;
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(void)n;
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return 0;
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}
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static msg_t put(void *ip, uint8_t b) {
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(void)ip;
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(void)b;
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return MSG_OK;
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}
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static msg_t get(void *ip) {
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(void)ip;
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return 4;
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}
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static const struct NullStreamVMT vmt = {(size_t)0, writes, reads, put, get};
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Null stream object initialization.
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*
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* @param[out] nsp pointer to the @p NullStream object to be initialized
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*/
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void nullObjectInit(NullStream *nsp) {
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nsp->vmt = &vmt;
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}
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/** @} */
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