rushs/evalexpr/src/fifo_setup_destroy.c


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#include <stdlib.h>

#include "fifo.h"

struct fifo *fifo_init(void)
{
    struct fifo *f = malloc(sizeof(struct fifo));
    if (f == NULL)
    {
        return NULL;
    }

    f->size = 0;
    f->head = NULL;
    f->tail = NULL;

    return f;
}

void fifo_clear(struct fifo *fifo)
{
    for (struct list *l = fifo->head; l != fifo->tail;)
    {
        struct list *tmp = l->next;
        free(l->data);
        free(l);
        l = tmp;
    }
    if (fifo->tail)
    {
        free(fifo->tail->data);
        free(fifo->tail);
    }

    fifo->head = NULL;
    fifo->tail = NULL;
    fifo->size = 0;
}

void fifo_destroy(struct fifo *fifo)
{
    fifo_clear(fifo);
    free(fifo);
}