Pratyush Mallick / Mbed OS nano_dac

this is testing

noos_mbed/util/fifo.c@0:e8a1ba50c46b, 2021-01-14 (annotated)

Committer:
pmallick
Date:
Thu Jan 14 19:12:57 2021 +0530
Revision:
0:e8a1ba50c46b
this is testing

Who changed what in which revision?

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pmallick 0:e8a1ba50c46b 1 /***************************************************************************//**
pmallick 0:e8a1ba50c46b 2 * @file fifo.c
pmallick 0:e8a1ba50c46b 3 * @brief Implementation of fifo.
pmallick 0:e8a1ba50c46b 4 * @author Cristian Pop (cristian.pop@analog.com)
pmallick 0:e8a1ba50c46b 5 ********************************************************************************
pmallick 0:e8a1ba50c46b 6 * Copyright 2019(c) Analog Devices, Inc.
pmallick 0:e8a1ba50c46b 7 *
pmallick 0:e8a1ba50c46b 8 * All rights reserved.
pmallick 0:e8a1ba50c46b 9 *
pmallick 0:e8a1ba50c46b 10 * Redistribution and use in source and binary forms, with or without
pmallick 0:e8a1ba50c46b 11 * modification, are permitted provided that the following conditions are met:
pmallick 0:e8a1ba50c46b 12 * - Redistributions of source code must retain the above copyright
pmallick 0:e8a1ba50c46b 13 * notice, this list of conditions and the following disclaimer.
pmallick 0:e8a1ba50c46b 14 * - Redistributions in binary form must reproduce the above copyright
pmallick 0:e8a1ba50c46b 15 * notice, this list of conditions and the following disclaimer in
pmallick 0:e8a1ba50c46b 16 * the documentation and/or other materials provided with the
pmallick 0:e8a1ba50c46b 17 * distribution.
pmallick 0:e8a1ba50c46b 18 * - Neither the name of Analog Devices, Inc. nor the names of its
pmallick 0:e8a1ba50c46b 19 * contributors may be used to endorse or promote products derived
pmallick 0:e8a1ba50c46b 20 * from this software without specific prior written permission.
pmallick 0:e8a1ba50c46b 21 * - The use of this software may or may not infringe the patent rights
pmallick 0:e8a1ba50c46b 22 * of one or more patent holders. This license does not release you
pmallick 0:e8a1ba50c46b 23 * from the requirement that you obtain separate licenses from these
pmallick 0:e8a1ba50c46b 24 * patent holders to use this software.
pmallick 0:e8a1ba50c46b 25 * - Use of the software either in source or binary form, must be run
pmallick 0:e8a1ba50c46b 26 * on or directly connected to an Analog Devices Inc. component.
pmallick 0:e8a1ba50c46b 27 *
pmallick 0:e8a1ba50c46b 28 * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
pmallick 0:e8a1ba50c46b 29 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
pmallick 0:e8a1ba50c46b 30 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
pmallick 0:e8a1ba50c46b 31 * IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
pmallick 0:e8a1ba50c46b 32 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
pmallick 0:e8a1ba50c46b 33 * LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
pmallick 0:e8a1ba50c46b 34 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
pmallick 0:e8a1ba50c46b 35 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
pmallick 0:e8a1ba50c46b 36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
pmallick 0:e8a1ba50c46b 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
pmallick 0:e8a1ba50c46b 38 *******************************************************************************/
pmallick 0:e8a1ba50c46b 39
pmallick 0:e8a1ba50c46b 40 /******************************************************************************/
pmallick 0:e8a1ba50c46b 41 /***************************** Include Files **********************************/
pmallick 0:e8a1ba50c46b 42 /******************************************************************************/
pmallick 0:e8a1ba50c46b 43
pmallick 0:e8a1ba50c46b 44 #include <string.h>
pmallick 0:e8a1ba50c46b 45 #include <stdlib.h>
pmallick 0:e8a1ba50c46b 46 #include "fifo.h"
pmallick 0:e8a1ba50c46b 47 #include "error.h"
pmallick 0:e8a1ba50c46b 48
pmallick 0:e8a1ba50c46b 49 /******************************************************************************/
pmallick 0:e8a1ba50c46b 50 /************************ Functions Definitions *******************************/
pmallick 0:e8a1ba50c46b 51 /******************************************************************************/
pmallick 0:e8a1ba50c46b 52
pmallick 0:e8a1ba50c46b 53 /**
pmallick 0:e8a1ba50c46b 54 * @brief Create new fifo element
pmallick 0:e8a1ba50c46b 55 * @param buff - Data to be saved in fifo.
pmallick 0:e8a1ba50c46b 56 * @param len - Length of the data.
pmallick 0:e8a1ba50c46b 57 * @return fifo element in case of success, NULL otherwise
pmallick 0:e8a1ba50c46b 58 */
pmallick 0:e8a1ba50c46b 59 static struct fifo_element * fifo_new_element(char *buff, uint32_t len)
pmallick 0:e8a1ba50c46b 60 {
pmallick 0:e8a1ba50c46b 61 struct fifo_element *q = calloc(1, sizeof(struct fifo_element));
pmallick 0:e8a1ba50c46b 62 if (!q)
pmallick 0:e8a1ba50c46b 63 return NULL;
pmallick 0:e8a1ba50c46b 64
pmallick 0:e8a1ba50c46b 65 q->len = len;
pmallick 0:e8a1ba50c46b 66 q->data = calloc(1, len);
pmallick 0:e8a1ba50c46b 67 if (!(q->data)) {
pmallick 0:e8a1ba50c46b 68 free(q);
pmallick 0:e8a1ba50c46b 69 return NULL;
pmallick 0:e8a1ba50c46b 70 }
pmallick 0:e8a1ba50c46b 71 memcpy(q->data, buff, len);
pmallick 0:e8a1ba50c46b 72
pmallick 0:e8a1ba50c46b 73 return q;
pmallick 0:e8a1ba50c46b 74 }
pmallick 0:e8a1ba50c46b 75
pmallick 0:e8a1ba50c46b 76 /**
pmallick 0:e8a1ba50c46b 77 * @brief Get last element in fifo
pmallick 0:e8a1ba50c46b 78 * @param p_fifo - pointer to fifo
pmallick 0:e8a1ba50c46b 79 * @return fifo last element if exists, NULL otherwise
pmallick 0:e8a1ba50c46b 80 */
pmallick 0:e8a1ba50c46b 81 static struct fifo_element *fifo_get_last(struct fifo_element *p_fifo)
pmallick 0:e8a1ba50c46b 82 {
pmallick 0:e8a1ba50c46b 83 if(p_fifo == NULL)
pmallick 0:e8a1ba50c46b 84 return NULL;
pmallick 0:e8a1ba50c46b 85 while (p_fifo->next) {
pmallick 0:e8a1ba50c46b 86 p_fifo = p_fifo->next;
pmallick 0:e8a1ba50c46b 87 }
pmallick 0:e8a1ba50c46b 88
pmallick 0:e8a1ba50c46b 89 return p_fifo;
pmallick 0:e8a1ba50c46b 90 }
pmallick 0:e8a1ba50c46b 91
pmallick 0:e8a1ba50c46b 92 /**
pmallick 0:e8a1ba50c46b 93 * @brief Insert element to fifo, in the last position.
pmallick 0:e8a1ba50c46b 94 * @param p_fifo - Pointer to fifo.
pmallick 0:e8a1ba50c46b 95 * @param buff - Data to be saved in fifo.
pmallick 0:e8a1ba50c46b 96 * @param len - Length of the data.
pmallick 0:e8a1ba50c46b 97 * @return SUCCESS in case of success, FAILURE otherwise
pmallick 0:e8a1ba50c46b 98 */
pmallick 0:e8a1ba50c46b 99 int32_t fifo_insert(struct fifo_element **p_fifo, char *buff, uint32_t len)
pmallick 0:e8a1ba50c46b 100 {
pmallick 0:e8a1ba50c46b 101 struct fifo_element *p, *q;
pmallick 0:e8a1ba50c46b 102
pmallick 0:e8a1ba50c46b 103 if (len <= 0)
pmallick 0:e8a1ba50c46b 104 return FAILURE;
pmallick 0:e8a1ba50c46b 105
pmallick 0:e8a1ba50c46b 106 q = fifo_new_element(buff, len);
pmallick 0:e8a1ba50c46b 107 if (!q)
pmallick 0:e8a1ba50c46b 108 return FAILURE;
pmallick 0:e8a1ba50c46b 109
pmallick 0:e8a1ba50c46b 110 if (!(*p_fifo)) {
pmallick 0:e8a1ba50c46b 111 *p_fifo = q;
pmallick 0:e8a1ba50c46b 112 } else {
pmallick 0:e8a1ba50c46b 113 p = fifo_get_last(*p_fifo);
pmallick 0:e8a1ba50c46b 114 p->next = q;
pmallick 0:e8a1ba50c46b 115 }
pmallick 0:e8a1ba50c46b 116
pmallick 0:e8a1ba50c46b 117 return SUCCESS;
pmallick 0:e8a1ba50c46b 118 }
pmallick 0:e8a1ba50c46b 119
pmallick 0:e8a1ba50c46b 120 /**
pmallick 0:e8a1ba50c46b 121 * @brief Remove fifo head
pmallick 0:e8a1ba50c46b 122 * @param p_fifo - Pointer to fifo.
pmallick 0:e8a1ba50c46b 123 * @return next element in fifo if exists, NULL otherwise.
pmallick 0:e8a1ba50c46b 124 */
pmallick 0:e8a1ba50c46b 125 struct fifo_element * fifo_remove(struct fifo_element *p_fifo)
pmallick 0:e8a1ba50c46b 126 {
pmallick 0:e8a1ba50c46b 127 struct fifo_element *p = p_fifo;
pmallick 0:e8a1ba50c46b 128
pmallick 0:e8a1ba50c46b 129 if (p_fifo != NULL) {
pmallick 0:e8a1ba50c46b 130 p_fifo = p_fifo->next;
pmallick 0:e8a1ba50c46b 131 free(p->data);
pmallick 0:e8a1ba50c46b 132 free(p);
pmallick 0:e8a1ba50c46b 133 }
pmallick 0:e8a1ba50c46b 134
pmallick 0:e8a1ba50c46b 135 return p_fifo;
pmallick 0:e8a1ba50c46b 136 }