1/*
2Copyright (c) 2012, Code Aurora Forum. All rights reserved.
3
4Redistribution and use in source and binary forms, with or without
5modification, are permitted provided that the following conditions are
6met:
7    * Redistributions of source code must retain the above copyright
8      notice, this list of conditions and the following disclaimer.
9    * Redistributions in binary form must reproduce the above
10      copyright notice, this list of conditions and the following
11      disclaimer in the documentation and/or other materials provided
12      with the distribution.
13    * Neither the name of Code Aurora Forum, Inc. nor the names of its
14      contributors may be used to endorse or promote products derived
15      from this software without specific prior written permission.
16
17THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*/
29
30#include <pthread.h>
31#include "mm_jpeg_dbg.h"
32#include "mm_jpeg.h"
33
34int32_t mm_jpeg_queue_init(mm_jpeg_queue_t* queue)
35{
36    pthread_mutex_init(&queue->lock, NULL);
37    cam_list_init(&queue->head.list);
38    queue->size = 0;
39    return 0;
40}
41
42int32_t mm_jpeg_queue_enq(mm_jpeg_queue_t* queue, void* data)
43{
44    mm_jpeg_q_node_t* node =
45        (mm_jpeg_q_node_t *)malloc(sizeof(mm_jpeg_q_node_t));
46    if (NULL == node) {
47        CDBG_ERROR("%s: No memory for mm_jpeg_q_node_t", __func__);
48        return -1;
49    }
50
51    memset(node, 0, sizeof(mm_jpeg_q_node_t));
52    node->data = data;
53
54    pthread_mutex_lock(&queue->lock);
55    cam_list_add_tail_node(&node->list, &queue->head.list);
56    queue->size++;
57    pthread_mutex_unlock(&queue->lock);
58
59    return 0;
60
61}
62
63void* mm_jpeg_queue_deq(mm_jpeg_queue_t* queue)
64{
65    mm_jpeg_q_node_t* node = NULL;
66    void* data = NULL;
67    struct cam_list *head = NULL;
68    struct cam_list *pos = NULL;
69
70    pthread_mutex_lock(&queue->lock);
71    head = &queue->head.list;
72    pos = head->next;
73    if (pos != head) {
74        node = member_of(pos, mm_jpeg_q_node_t, list);
75        cam_list_del_node(&node->list);
76        queue->size--;
77    }
78    pthread_mutex_unlock(&queue->lock);
79
80    if (NULL != node) {
81        data = node->data;
82        free(node);
83    }
84
85    return data;
86}
87
88uint32_t mm_jpeg_queue_get_size(mm_jpeg_queue_t* queue)
89{
90    uint32_t size = 0;
91
92    pthread_mutex_lock(&queue->lock);
93    size = queue->size;
94    pthread_mutex_unlock(&queue->lock);
95
96    return size;
97
98}
99
100int32_t mm_jpeg_queue_deinit(mm_jpeg_queue_t* queue)
101{
102    mm_jpeg_queue_flush(queue);
103    pthread_mutex_destroy(&queue->lock);
104    return 0;
105}
106
107int32_t mm_jpeg_queue_flush(mm_jpeg_queue_t* queue)
108{
109    mm_jpeg_q_node_t* node = NULL;
110    void* data = NULL;
111    struct cam_list *head = NULL;
112    struct cam_list *pos = NULL;
113
114    pthread_mutex_lock(&queue->lock);
115    head = &queue->head.list;
116    pos = head->next;
117
118    while(pos != head) {
119        node = member_of(pos, mm_jpeg_q_node_t, list);
120        cam_list_del_node(&node->list);
121        queue->size--;
122
123        /* for now we only assume there is no ptr inside data
124         * so we free data directly */
125        if (NULL != node->data) {
126            free(node->data);
127        }
128        free(node);
129        pos = pos->next;
130    }
131    queue->size = 0;
132    pthread_mutex_unlock(&queue->lock);
133    return 0;
134}
135