Wiesner András
05288d7a3c
- IGMPv2 capabilities added (report membership, leave group) - ICMP capabilities added (ping) - Tx Message Queue added
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
//
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// Created by epagris on 2023.01.13..
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//
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#include <memory.h>
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#include <stdbool.h>
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#include "msg_queue.h"
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#include "dynmem.h"
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MsgQueue *mq_create(uint32_t size) {
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MsgQueue * mq = (MsgQueue *) dynmem_alloc(sizeof(MsgQueue) + size * sizeof(RawPckt));
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mq->size = size;
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mq->readIdx = 0;
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mq->writeIdx = 0;
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memset(mq->pckts, 0, mq->size * sizeof(RawPckt));
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return mq;
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}
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void mq_clear(MsgQueue * mq) {
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mq->readIdx = 0;
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mq->writeIdx = 0;
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memset(mq->pckts, 0, mq->size * sizeof(RawPckt));
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}
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uint32_t mq_avail(const MsgQueue * mq) {
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return mq->writeIdx - mq->readIdx;
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}
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#define MQ_NEXT(size,current) (((current)+1)%(size))
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bool mq_push(MsgQueue * mq, const RawPckt * raw) {
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if (MQ_NEXT(mq->size, mq->writeIdx) == mq->readIdx) { // cannot push, queue is full
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return false;
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}
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// can push
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mq->pckts[mq->writeIdx++] = *raw;
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// advance write pointer
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mq->writeIdx = MQ_NEXT(mq->size, mq->writeIdx);
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return true;
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}
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RawPckt mq_top(MsgQueue * mq) {
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return mq->pckts[mq->readIdx];
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}
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void mq_pop(MsgQueue * mq) {
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if (mq_avail(mq) > 0) { // if there's something to pop
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mq->readIdx = MQ_NEXT(mq->size, mq->readIdx);
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}
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}
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