queue.h

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#ifndef __QUEUE_H__
#define __QUEUE_H__

/*struct queue_node {
        void *item; ///<Stored value
        struct queue_node *next; ///<Link to next node
};*/

typedef struct {
        struct queue_node *head; 
        struct queue_node *tail; 
        unsigned int size; 
} queue_t;

void queue_init(queue_t *q);
void queue_destroy(queue_t *q);

void *queue_dequeue(queue_t *q);
void *queue_at(queue_t *q, int pos);
void *queue_remove_at(queue_t *q, int pos);
void queue_enqueue(queue_t *q, void *item);
unsigned int queue_size(queue_t *q);

void queue_iterate(queue_t *q, void (*iter_func)(void *, void *), void *arg);

#endif