queue.c

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/* str_queue.c
*
* Copyright (c) 2014-2015, Tuan PM <tuanpm at live dot com>
* 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 Redis 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.
*/
#include "queue.h"
#include "proto.h"

#include <esp8266.h>

uint8_t *last_rb_p_r;
uint8_t *last_rb_p_w;
uint32_t last_fill_cnt;

void ICACHE_FLASH_ATTR QUEUE_Init(QUEUE *queue, int bufferSize)
{
    queue->buf = (uint8_t*)os_zalloc(bufferSize);
    RINGBUF_Init(&queue->rb, queue->buf, bufferSize);
}
int32_t ICACHE_FLASH_ATTR QUEUE_Puts(QUEUE *queue, uint8_t* buffer, uint16_t len)
{
    uint32_t ret;
    
    last_rb_p_r = queue->rb.p_r;
    last_rb_p_w = queue->rb.p_w;
    last_fill_cnt = queue->rb.fill_cnt;
    
    ret = PROTO_AddRb(&queue->rb, buffer, len);
    if (ret == -1) {
        // rolling ring buffer back
        queue->rb.p_r = last_rb_p_r;
        queue->rb.p_w = last_rb_p_w;
        queue->rb.fill_cnt = last_fill_cnt;
    }
    return ret;
}
int32_t ICACHE_FLASH_ATTR QUEUE_Gets(QUEUE *queue, uint8_t* buffer, uint16_t* len, uint16_t maxLen)
{
    return PROTO_ParseRb(&queue->rb, buffer, len, maxLen);
}

BOOL ICACHE_FLASH_ATTR QUEUE_IsEmpty(QUEUE *queue)
{
    if(queue->rb.fill_cnt<=0)
        return TRUE;
    return FALSE;
}