guacamole-spice-protocol/src/common/guac_list.c
2014-03-02 10:39:36 -08:00

85 lines
2.4 KiB
C

/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "guac_list.h"
#include <stdlib.h>
#include <pthread.h>
guac_common_list* guac_common_list_alloc() {
guac_common_list* list = malloc(sizeof(guac_common_list));
pthread_mutex_init(&list->_lock, NULL);
list->head = NULL;
return list;
}
void guac_common_list_free(guac_common_list* list) {
free(list);
}
guac_common_list_element* guac_common_list_add(guac_common_list* list,
void* data) {
/* Allocate element, initialize as new head */
guac_common_list_element* element =
malloc(sizeof(guac_common_list_element));
element->data = data;
element->next = list->head;
element->_ptr = &(list->head);
/* If head already existed, point it at this element */
if (list->head != NULL)
list->head->_ptr = &(element->next);
/* Set as new head */
list->head = element;
return element;
}
void guac_common_list_remove(guac_common_list* list,
guac_common_list_element* element) {
/* Point previous (or head) to next */
*(element->_ptr) = element->next;
if (element->next != NULL)
element->next->_ptr = element->_ptr;
free(element);
}
void guac_common_list_lock(guac_common_list* list) {
pthread_mutex_lock(&list->_lock);
}
void guac_common_list_unlock(guac_common_list* list) {
pthread_mutex_unlock(&list->_lock);
}