summaryrefslogtreecommitdiff
path: root/mobicore/daemon/Daemon/Device/NotificationQueue.cpp
blob: a034c4cd127be0d457c8b66b69748232ed5b4556 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
/** @addtogroup MCD_MCDIMPL_DAEMON_DEV
 * @{
 * @file
 *
 *
 * Copyright (c) 2013 TRUSTONIC LIMITED
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the TRUSTONIC LIMITED nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "NotificationQueue.h"
#include <stddef.h>

#include "log.h"

//------------------------------------------------------------------------------
NotificationQueue::NotificationQueue(
    notificationQueue_t *i,
    notificationQueue_t *o,
    uint32_t size
) : in(i), out(o)
{
    in->hdr.queueSize = size;
    out->hdr.queueSize = size;
}


//------------------------------------------------------------------------------
void NotificationQueue::putNotification(
    notification_t *notification
)
{
    mutex.lock();
    if ((out->hdr.writeCnt - out->hdr.readCnt) < out->hdr.queueSize) {
        out->notification[out->hdr.writeCnt & (out->hdr.queueSize - 1)]
        = *notification;
        out->hdr.writeCnt++;
    }
    mutex.unlock();
}


//------------------------------------------------------------------------------
notification_t *NotificationQueue::getNotification(
    void
)
{
    notification_t *ret = NULL;
    mutex.lock();
    if ((in->hdr.writeCnt - in->hdr.readCnt) > 0) {
        ret = &(in->notification[in->hdr.readCnt & (in->hdr.queueSize - 1)]);
        in->hdr.readCnt++;
    }
    mutex.unlock();
    return ret;
}

/** @} */