1 00:00:00,630 --> 00:00:01,750 Hello, welcome back. 2 00:00:01,770 --> 00:00:08,630 In this lesson, we going to see how to delete a task or in other words, kill a task, right? 3 00:00:08,670 --> 00:00:10,290 I'm going to make a copy of a. 4 00:00:12,770 --> 00:00:17,030 Well, let's see our resume talk project, I'm going to make a copy of this number nine. 5 00:00:17,600 --> 00:00:20,800 Controversy to copy and paste this over here. 6 00:00:22,070 --> 00:00:23,450 I call this number 12. 7 00:00:25,680 --> 00:00:26,670 Children, a task. 8 00:00:36,510 --> 00:00:38,390 And then copy over here. 9 00:00:39,330 --> 00:00:39,730 Right. 10 00:00:40,020 --> 00:00:49,920 So by default, the function for doing things like deleting a task are not enabled by the kernel, so 11 00:00:49,920 --> 00:00:53,100 we need to go to the configuration files to enable those features. 12 00:00:53,760 --> 00:00:59,640 OK, so to go to the configuration file where we would have to do is going to click on Simms's. 13 00:01:00,300 --> 00:01:02,250 I'm going to click on Simms's dot. 14 00:01:03,930 --> 00:01:11,400 One way to do it is to find the free config, each file, and we can do that by going to see him systems 15 00:01:11,430 --> 00:01:18,800 each and then go to free that each and then from free artists each go to free Archos conflict attatched. 16 00:01:19,170 --> 00:01:25,650 Another way is to click free actors to see, followed by here, which is a source for the open free 17 00:01:25,650 --> 00:01:26,490 artist to see. 18 00:01:26,850 --> 00:01:30,990 And in here we find free art or storage, but we do not find conflict. 19 00:01:30,990 --> 00:01:35,160 Orridge So I double click free artists that HLC open declaration. 20 00:01:35,690 --> 00:01:42,390 When we open declaration of this file and scroll down, we have free Arktos conflict each double click 21 00:01:42,390 --> 00:01:44,400 on this and then open declaration. 22 00:01:45,570 --> 00:01:53,750 And this file here gives the configurations of our current system over here config enable FPU. 23 00:01:53,910 --> 00:02:01,020 It says zero meaning we've not enabled FPU here MPU Memory Protection Unit that also says you were meeting 24 00:02:01,020 --> 00:02:01,810 with my neighborhood. 25 00:02:01,810 --> 00:02:06,360 It's static allocation is enabled, dynamic allocation is enabled. 26 00:02:06,720 --> 00:02:09,870 I hook it's not enabled. 27 00:02:10,050 --> 00:02:10,880 Take hook. 28 00:02:10,890 --> 00:02:12,090 It's not enabled. 29 00:02:13,010 --> 00:02:13,720 And see. 30 00:02:15,500 --> 00:02:16,070 Waddell's. 31 00:02:17,230 --> 00:02:21,170 Use mutex is not a neighborhood, it is a neighborhood, OK? 32 00:02:21,570 --> 00:02:23,960 Anywhere you see, zero means it's not a neighborhood. 33 00:02:24,400 --> 00:02:27,130 We came here to see if I want to lead the task. 34 00:02:27,820 --> 00:02:28,650 It's a neighborhood. 35 00:02:29,050 --> 00:02:30,130 So these are the functions. 36 00:02:30,130 --> 00:02:32,920 And neighborhood sets priorities and neighborhood gets priorities. 37 00:02:32,920 --> 00:02:35,620 And Neighborhood Daily Task is actually a neighborhood here. 38 00:02:36,610 --> 00:02:41,350 Task cleanup resource is disabled and all other functions are enabled. 39 00:02:41,530 --> 00:02:44,280 So we can see that the daily task is a neighborhood. 40 00:02:44,500 --> 00:02:49,360 If we change from one to zero over here, we wouldn't be able to use that particular function. 41 00:02:50,290 --> 00:02:50,830 OK. 42 00:02:53,060 --> 00:02:58,170 OK, so let's see how it works, I'm going to come down here, over here. 43 00:02:58,340 --> 00:02:59,740 This is our previous project. 44 00:02:59,750 --> 00:03:01,160 We built a copy of our. 45 00:03:03,000 --> 00:03:05,920 Let's see, let's make sure we are in our project. 46 00:03:05,940 --> 00:03:06,720 No, I live in. 47 00:03:07,650 --> 00:03:09,120 What was the project, no. 48 00:03:15,150 --> 00:03:15,810 Let's see. 49 00:03:18,090 --> 00:03:19,080 Killing the task. 50 00:03:19,530 --> 00:03:21,420 OK, I'm going to rename this the name. 51 00:03:22,440 --> 00:03:25,890 As Retina's 19 is supposed to be 12. 52 00:03:29,340 --> 00:03:30,960 OK, just bear with me. 53 00:03:34,670 --> 00:03:37,100 OK, so I'm going to open the window, see for. 54 00:03:40,920 --> 00:03:48,540 OK, so this is from our Resume Project Resume TASC project, where we suspended Red Read, suspended 55 00:03:48,540 --> 00:03:51,570 itself and then it was resumed by green. 56 00:03:52,320 --> 00:03:56,610 So what we're going to do is we're going to make red kill itself or red delete itself. 57 00:03:56,880 --> 00:03:59,370 I'm still going to keep this resume monitor. 58 00:04:00,520 --> 00:04:03,760 And then I'm going to change the flag here. 59 00:04:06,180 --> 00:04:06,660 From. 60 00:04:07,910 --> 00:04:12,680 The suspended officer is killed and then I'll simply call this. 61 00:04:14,580 --> 00:04:19,860 I could call this execution monitor rather than resume so that it doesn't get confusing. 62 00:04:23,220 --> 00:04:23,800 OK. 63 00:04:24,720 --> 00:04:30,210 Rather than suspend, I change, suspend, monitor to execution monitor, because we're not suspending 64 00:04:30,210 --> 00:04:30,460 here. 65 00:04:30,780 --> 00:04:31,710 So over here. 66 00:04:33,210 --> 00:04:39,060 Red is green to whenever red execute, we bring to increment execution monitor. 67 00:04:40,370 --> 00:04:46,370 And then we're going to see if execution is greater than 50, we're going to set skewed to true. 68 00:04:48,850 --> 00:04:57,280 And then we're going to set the execution one meter to zero and then going, we will call the X. We're 69 00:04:57,280 --> 00:05:04,870 going to call the V task delete function when we personally means delete this same task. 70 00:05:06,710 --> 00:05:07,220 Thank you. 71 00:05:11,990 --> 00:05:13,190 And what we're going to do is. 72 00:05:15,960 --> 00:05:22,410 I'm going to comment on this block in green, remember green control, I was supposed to resume right 73 00:05:22,410 --> 00:05:25,740 after it suspended Green to comment on this. 74 00:05:26,950 --> 00:05:35,620 A highlight this in comments like this, let's build this and see what we have read is going to execute 75 00:05:35,750 --> 00:05:41,050 execution monitor when it's passed is 50 is screen to delete itself. 76 00:05:41,590 --> 00:05:42,670 I'll click here to build. 77 00:05:56,620 --> 00:05:57,280 It's building. 78 00:05:59,270 --> 00:06:02,720 It's been successfully a click here to get onto the board. 79 00:06:04,620 --> 00:06:06,330 I'll see, OK, over here. 80 00:06:13,470 --> 00:06:14,400 Click here to switch. 81 00:06:19,710 --> 00:06:20,270 OK. 82 00:06:22,190 --> 00:06:26,750 So what is of interest is the counter variables of the three tasks. 83 00:06:28,000 --> 00:06:34,930 The profile as Plutarch profile of red and then green, when I click here to run, they are running, 84 00:06:34,930 --> 00:06:36,170 they're all running together. 85 00:06:36,220 --> 00:06:37,290 Let's see what happens. 86 00:06:40,310 --> 00:06:46,430 It would have been good to monitor execution monitor as well to an execution monitor, to live expressionists 87 00:06:47,120 --> 00:06:51,050 in a way, as soon as they hit 50 red stops moving. 88 00:06:51,980 --> 00:06:55,430 And it doesn't move again, Red has, in effect, killed itself. 89 00:06:55,910 --> 00:06:59,510 OK, so let's see, how is this different from suspension? 90 00:07:00,260 --> 00:07:04,940 Well, we're going to attempt to resume, read and see what happens. 91 00:07:05,690 --> 00:07:11,030 I'm going to come over here on comment this block and see over here if Eskild. 92 00:07:13,860 --> 00:07:20,560 If it's killed, then we're going to start running our resume monitor and after that, after resume 93 00:07:20,560 --> 00:07:28,620 monitors greater than 30, we want to resume read this wonderful read and then we're going to set Eskild 94 00:07:28,620 --> 00:07:30,360 back to force, just like we did. 95 00:07:30,360 --> 00:07:31,500 Four is suspend 96 00:07:34,650 --> 00:07:35,790 so quickly to build. 97 00:07:38,200 --> 00:07:40,930 It's built successfully a click here to get onto the boat. 98 00:07:46,200 --> 00:07:47,130 Click here to switch. 99 00:07:50,910 --> 00:07:53,280 What I'm going to do is I'm going to add Eskild. 100 00:07:55,090 --> 00:08:00,850 Oh, execution Wanita sorry, I'm going to add execution monitor to live expressions, I'll copy this. 101 00:08:01,260 --> 00:08:05,050 I'm going to remove this one here knownas or spend money to. 102 00:08:06,340 --> 00:08:08,620 OK, so now let's run this and see. 103 00:08:10,220 --> 00:08:16,700 As you can see, incrementing, execute and monitor, execution monitors incrementing as well, execution 104 00:08:16,700 --> 00:08:19,670 monitor, as soon as it hits 50 read is going to be killed. 105 00:08:21,420 --> 00:08:27,690 It's hits 15 already frozen now resume monitor, as soon as it hits 30 would attempt to resume, right, 106 00:08:28,170 --> 00:08:29,240 but it hits 30. 107 00:08:29,250 --> 00:08:30,110 Nothing happened. 108 00:08:30,130 --> 00:08:31,270 Read wasn't resumed. 109 00:08:31,860 --> 00:08:34,470 So Red was, in effect, deleted. 110 00:08:34,530 --> 00:08:36,780 This is different from suspending it. 111 00:08:37,620 --> 00:08:40,260 OK, so this all the risk for this lesson? 112 00:08:40,260 --> 00:08:44,620 If you have any questions, leave them in the questions and also area, you know, see you later. 113 00:08:44,620 --> 00:08:44,820 Have.