docs/examples/tutorial/clibraries/c-algorithms/src/queue.h


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/* queue.h */

typedef struct _Queue Queue;
typedef void *QueueValue;

Queue *queue_new(void);
void queue_free(Queue *queue);

int queue_push_head(Queue *queue, QueueValue data);
QueueValue queue_pop_head(Queue *queue);
QueueValue queue_peek_head(Queue *queue);

int queue_push_tail(Queue *queue, QueueValue data);
QueueValue queue_pop_tail(Queue *queue);
QueueValue queue_peek_tail(Queue *queue);

int queue_is_empty(Queue *queue);