1 package com.csizg.jniport;
2
3
4 import java.util.ArrayList;
5 import java.util.List;
6
7 /**
8 * 与芯片交互线程
9 */
10 public class SpiQueue implements Runnable {
11
12 private static final String TAG = SpiQueue.class.getSimpleName();
13
14 private static final byte INIT = 0;// 初始化
15 private static final byte RUNNING = 1;// 执行中
16 private static final byte WITING = 2;// 暂停等待中
17 private static final byte DONE = 3;// 结束
18
19 private byte state = INIT;// 执行状态
20
21 private static SpiQueue spiQueue = null;
22
23 private SpiQueue() {
24
25 }
26
27 public static SpiQueue getSpiQueue() {
28 if (spiQueue == null) {
29 spiQueue = new SpiQueue();
30 }
31 return spiQueue;
32 }
33
34 private Thread thread;
35 private List<SpiTask> tasks = new ArrayList<>();
36
37 @Override
38 public void run() {
39 state = RUNNING;
40 while (state != DONE) {
41 synchronized (this) {
42 SpiTask currentTask = getNextTask();
43 if (currentTask == null) {
44 System.out.println(TAG + " run " + "no task todo begin to waiting");
45 try {
46 state = WITING;
47 wait();
48 } catch (InterruptedException e) {
49 e.printStackTrace();
50 }
51 } else {
52 try {
53 Thread.sleep(10);
54 } catch (InterruptedException e) {
55 e.printStackTrace();
56 }
57 System.out.println(TAG + " run " + "currentTask = " + currentTask.toString());
58 }
59 }
60 }
61
62 }
63
64 private synchronized SpiTask getNextTask() {
65 System.out.println(TAG + " getNextTask " + "tasks.size() = " + tasks.size());
66 if (tasks.size() > 0) {
67 SpiTask task = tasks.remove(0);
68 return task;
69 }
70 return null;
71 }
72
73 public synchronized void addTask(SpiTask task) {
74 System.out.println(TAG + " addTask " + "tasks.size() = " + tasks.size() + ", new task : " + task.getCode());
75 if (state == DONE) {
76 System.out.println(TAG + " addTask " + "Thread is DONE : task : " + task.getCode());
77 return;
78 }
79 tasks.add(task);
80 if (state != RUNNING) {
81 synchronized (this) {
82 state = RUNNING;
83 System.out.println(TAG + " addTask notifyAll ");
84 notifyAll();
85 }
86 }
87 }
88
89 public synchronized void start() {
90 System.out.println(TAG + " start " + "state = " + state);
91 if (state == RUNNING || state == WITING) {
92 return;
93 }
94 state = INIT;
95 // 运行本线程
96 tasks.clear();
97 if (thread != null) {
98 thread.interrupt();
99 }
100 thread = new Thread(this);
101 thread.start();
102 }
103
104
105 public synchronized void stop() {
106 state = DONE;
107 tasks.clear();
108 synchronized (this) {
109 notifyAll();
110 }
111 }
112 }
