idle_invalidator.cpp revision b166940edca6e312463461438e2aa66e9852c26a 
1/*
2 * Copyright (c) 2012, The Linux Foundation. All rights reserved.
3
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
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 The Linux Foundation 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 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "idle_invalidator.h"
31#include <unistd.h>
32
33#define II_DEBUG 0
34
35static const char *threadName = "Invalidator";
36InvalidatorHandler IdleInvalidator::mHandler = NULL;
37android::sp<IdleInvalidator> IdleInvalidator::sInstance(0);
38
39IdleInvalidator::IdleInvalidator(): Thread(false), mHwcContext(0),
40    mSleepAgain(false), mSleepTime(0) {
41        ALOGD_IF(II_DEBUG, "%s", __func__);
42    }
43
44int IdleInvalidator::init(InvalidatorHandler reg_handler, void* user_data,
45                          unsigned int idleSleepTime) {
46    ALOGD_IF(II_DEBUG, "%s", __func__);
47
48    /* store registered handler */
49    mHandler = reg_handler;
50    mHwcContext = user_data;
51    mSleepTime = idleSleepTime; //Time in millis
52    return 0;
53}
54
55bool IdleInvalidator::threadLoop() {
56    ALOGD_IF(II_DEBUG, "%s", __func__);
57    usleep(mSleepTime * 500);
58    if(mSleepAgain) {
59        //We need to sleep again!
60        mSleepAgain = false;
61        return true;
62    }
63
64    mHandler((void*)mHwcContext);
65    return false;
66}
67
68int IdleInvalidator::readyToRun() {
69    ALOGD_IF(II_DEBUG, "%s", __func__);
70    return 0; /*NO_ERROR*/
71}
72
73void IdleInvalidator::onFirstRef() {
74    ALOGD_IF(II_DEBUG, "%s", __func__);
75}
76
77void IdleInvalidator::markForSleep() {
78    mSleepAgain = true;
79    //Triggers the threadLoop to run, if not already running.
80    run(threadName, android::PRIORITY_AUDIO);
81}
82
83IdleInvalidator *IdleInvalidator::getInstance() {
84    ALOGD_IF(II_DEBUG, "%s", __func__);
85    if(sInstance.get() == NULL)
86        sInstance = new IdleInvalidator();
87    return sInstance.get();
88}
89