1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "WorkerThread.h"
18
19#define LOG_NDEBUG 0
20#define LOG_TAG "EmulatedCamera_WorkerThread"
21#include <cutils/log.h>
22
23#include <algorithm>
24
25namespace android {
26
27WorkerThread::WorkerThread(const char* threadName,
28                           EmulatedCameraDevice* cameraDevice,
29                           EmulatedCamera* cameraHAL)
30    : Thread(true),   // Callbacks may involve Java calls.
31      mCameraDevice(cameraDevice),
32      mCameraHAL(cameraHAL),
33      mRunning(false),
34      mThreadName(threadName) {
35}
36
37status_t WorkerThread::startThread(bool oneBurst) {
38    ALOGV("Starting worker thread, oneBurst=%s", oneBurst ? "true" : "false");
39    mOneBurst = oneBurst;
40    {
41        Mutex::Autolock lock(mRunningMutex);
42        mRunning = true;
43    }
44    return run(mThreadName, ANDROID_PRIORITY_URGENT_DISPLAY, 0);
45}
46
47status_t WorkerThread::stopThread() {
48    ALOGV("%s: Stopping worker thread...", __FUNCTION__);
49
50    Mutex::Autolock lock(mRunningMutex);
51    mRunning = false;
52    mRunningCondition.signal();
53    return NO_ERROR;
54}
55
56status_t WorkerThread::wakeThread() {
57    ALOGV("%s: Waking emulated camera device's worker thread...", __FUNCTION__);
58
59    mRunningCondition.signal();
60    return NO_ERROR;
61}
62
63status_t WorkerThread::joinThread() {
64    return join();
65}
66
67status_t WorkerThread::readyToRun()
68{
69    status_t res = onThreadStart();
70    if (res != NO_ERROR) {
71        return res;
72    }
73    return NO_ERROR;
74}
75
76bool WorkerThread::threadLoop() {
77    if (inWorkerThread() && !mOneBurst) {
78        /* Only return true if we're running. If mRunning has been set to false
79         * we fall through to ensure that onThreadExit is called. */
80        Mutex::Autolock lock(mRunningMutex);
81        if (mRunning) {
82            return true;
83        }
84    }
85    onThreadExit();
86    ALOGV("%s: Exiting thread, mOneBurst=%s",
87          __FUNCTION__, mOneBurst ? "true" : "false");
88    return false;
89}
90
91}  // namespace android
92
93