[参考译文] CC1312R：队列无法删除元素

尊敬的 Faker：

如果你查看 Queue.h、就会发现 Queue_enqueue 中没有发生存储器分配。 这意味着您必须自行分配和取消分配每个元素。

在您发布的代码中、每个元素都是根据编译器的工作方式引用其自身的。

以下是工作代码：

/*
 * Copyright (c) 2015-2019, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
 *
 *Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
 *
 *Neither the name of Texas Instruments Incorporated nor the names of
  its contributors may be used to endorse or promote products derived
  from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
======== empty.c ========
 */

/* For usleep() */
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <stddef.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
// #include <ti/drivers/I2C.h>
// #include <ti/drivers/SPI.h>
// #include <ti/drivers/Watchdog.h>
// Import Display Driver definitions
#include <ti/display/Display.h>

/* Driver configuration */
#include "ti_drivers_config.h"

#include <ti/sysbios/knl/Queue.h>

typedef struct Rec {
    Queue_Elem _elem;
    int data;
} Rec;

int mainThread(void)
{
    Queue_Handle q;
    Rec r1, r2;
    Rec* rp;
    // Initialize optional Display parameters
    Display_Handle    handle;
    Display_Params    params;
    Display_Params_init(&params);

    // Open Display implementation
    handle = Display_open(Display_Type_UART, &params);

    if (handle == NULL) {
        // Display_open() failed
        while(1);
    }

    // create a Queue instance 'q'
    q = Queue_create(NULL, NULL);

    for (int i = 0; i < 3; i++)
    {
        Rec *r;

        r = malloc(sizeof(Rec));
        r->data = 300 * i;

        Queue_enqueue(q, &r->_elem);
    }

    // deQ the records and print their data values until Q is empty
    while ((Queue_Handle)(rp = Queue_dequeue(q)) != q) {
        Display_printf(handle, 0, 0, "%d\n", rp->data);
        free(rp);
    }

    return (0);
}

此致、

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