include/kpl/queue.h


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#pragma once

// KPL atomic queues

#include "kpl/macro.h"

typedef struct _kpl_task kpl_task;

typedef struct {
    kpl_task *_Atomic head, *tail;
    struct {
       kpl_task *_Atomic next;
    } dummy;
} kpl_task_queue;

void kpl_task_queue_init(kpl_task_queue *task_queue);

void kpl_task_queue_add(kpl_task_queue *task_queue, kpl_task *task);

kpl_task *kpl_task_queue_next(kpl_task_queue *task_queue);

typedef enum : int8_t {
    KPL_RING_QUEUE_MIN_POW2     = 4,
    KPL_RING_QUEUE_MAX_POW2     = 30
} kpl_ring_queue_pow2_sizes;

typedef struct {
    _Atomic ssize_t index;
    void *data;
} kpl_ring_queue_item;

typedef struct {
    size_t items_mask;
    _Atomic ssize_t head_index, tail_index;
    kpl_ring_queue_item *items;
} kpl_ring_queue;

bool kpl_ring_queue_init(kpl_ring_queue *ring_queue, int8_t size_pow2);

void kpl_ring_queue_free(kpl_ring_queue *ring_queue);

bool kpl_ring_queue_add(kpl_ring_queue *ring_queue, void *data);

void *kpl_ring_queue_next(kpl_ring_queue *ring_queue);