rtbuf/rtbuf/gtk3/queue.c

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• Hash : adb9e235
  Author : Thomas de Grivel
  Date : 2023-01-14T18:26:30
  

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• gtk3/queue.c

• /* rtbuf
   * Copyright 2018-2023 kmx.io <contact@kmx.io>
   *
   * Permission is hereby granted to use this software excepted
   * on Apple computers granted the above copyright notice and
   * this permission paragraph are included in all copies and
   * substantial portions of this software.
   *
   * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
   * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
   * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
   * THIS SOFTWARE.
   */
  #include <assert.h>
  #include <stdlib.h>
  #include "queue.h"
  
  void queue_init (s_queue *q)
  {
    assert(q);
    q->head = NULL;
    q->tail = NULL;
    q->length = 0;
  }
  
  void queue_destroy (s_queue *q)
  {
    assert(q);
    list_delete_all(q->head);
    q->head = NULL;
    q->tail = NULL;
    q->length = 0;
  }
  
  s_queue * queue_new ()
  {
    s_queue *q = malloc(sizeof(s_queue));
    if (q)
      queue_init(q);
    return q;
  }
  
  void queue_delete (s_queue *q)
  {
    assert(q);
    queue_destroy(q);
    free(q);
  }
  
  void queue_enqueue (s_queue *q, void *item)
  {
    s_list *l;
    assert(q);
    l = list_new(item, NULL);
    assert(l);
    if (q->length == 0) {
      q->head = q->tail = l;
    }
    else {
      assert(q->tail);
      q->tail->next = l;
      q->tail = l;
    }
    q->length++;
  }
  
  void * queue_dequeue (s_queue *q)
  {
    s_list *head;
    void *item;
    assert(q);
    assert(q->length > 0);
    assert(q->head);
    head = q->head;
    item = head->item;
    q->head = head->next;
    if (q->head == NULL)
      q->tail = NULL;
    q->length--;
    list_delete(head);
    return item;
  }
  

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