1 00:00:00,360 --> 00:00:07,590 Hello, welcome back and listen, we going to see how to work with mutex we saw how to use semaphores. 2 00:00:08,100 --> 00:00:14,910 I've made a copy of our last project, which is our always for and I've called this one which mutex 3 00:00:14,910 --> 00:00:15,840 it is over here. 4 00:00:16,230 --> 00:00:18,740 I'm going to expand it and open the main door. 5 00:00:18,750 --> 00:00:20,100 See far from here. 6 00:00:22,260 --> 00:00:31,530 And we simply going to convert this project to a mutex so a mutex takes a simple structure, a simple 7 00:00:31,530 --> 00:00:35,070 structure of attributes we need. 8 00:00:35,070 --> 00:00:38,460 No, actually let's go and find a mutex. 9 00:00:39,120 --> 00:00:40,590 This is all documentation. 10 00:00:42,750 --> 00:00:44,890 We have to track everything down together. 11 00:00:45,030 --> 00:00:45,980 It's better that way. 12 00:00:50,270 --> 00:00:52,040 So this is mutex management. 13 00:00:54,290 --> 00:00:58,070 OK, so the mutex has an attribute. 14 00:00:59,060 --> 00:01:03,560 OK, and then there is the new text, new function, let's see this. 15 00:01:05,680 --> 00:01:07,900 The function simply takes the attributes. 16 00:01:08,770 --> 00:01:17,500 OK, so over here we have an attribute for our semaphore, which we call currently, which we are calling 17 00:01:17,500 --> 00:01:18,960 you at for our troops. 18 00:01:19,870 --> 00:01:23,410 So we're going to replace this with a mutex attribute. 19 00:01:23,770 --> 00:01:27,860 So this attribute is of type always mutex Atiyyah. 20 00:01:29,590 --> 00:01:35,800 So I simply replace this with a mutex attribute, and I'm giving this a new name, you automatics, 21 00:01:36,370 --> 00:01:39,310 and then the name of the troops or the attributes is you. 22 00:01:39,640 --> 00:01:41,440 You are mutex attributes. 23 00:01:42,220 --> 00:01:47,200 So then I'm going to come down here to create the mutex where we created a SEMAFO. 24 00:01:48,040 --> 00:01:51,460 Over here, we simply replace the function here. 25 00:01:53,780 --> 00:01:54,860 With mutex. 26 00:01:58,940 --> 00:02:08,390 So before we do that, we have to create an I.D. to hold our mutex so we're going to create a US mutex 27 00:02:08,390 --> 00:02:09,890 ID data type. 28 00:02:11,030 --> 00:02:17,210 Over here, we have a semaphore type, we're going to delete this and have a mutex type going to call 29 00:02:17,210 --> 00:02:19,520 this, you add MOUT. 30 00:02:20,210 --> 00:02:22,250 OK, right. 31 00:02:22,850 --> 00:02:27,290 So once this is done, we'll go ahead to create a new mutex. 32 00:02:28,010 --> 00:02:31,040 So I'll scroll down here where we created a SEMAFO. 33 00:02:31,050 --> 00:02:34,340 I'm going to come in this out and create a new mutex. 34 00:02:35,700 --> 00:02:38,800 Then, like we said, simply takes the attributes as argument. 35 00:02:38,840 --> 00:02:40,910 This what we saw in the documentation. 36 00:02:41,490 --> 00:02:50,690 OK, so once this is done, we can simply go and replace our SEMAFO Akwa of release with mutex. 37 00:02:51,020 --> 00:02:57,080 So over here, rather than see SEMAFO acquire, we simply save mutex acquire. 38 00:03:01,840 --> 00:03:11,260 Always mutex Akwa and rather than see always SEMAFO release, you say always mutex release. 39 00:03:13,700 --> 00:03:21,340 And then we do it for the other one, this one here, red, a little controller ask rather than, say, 40 00:03:21,360 --> 00:03:31,580 WMI for Akwa you say always mutex Akwa and we release by calling the voice always mutex release function 41 00:03:31,580 --> 00:03:32,150 like this. 42 00:03:33,230 --> 00:03:35,150 OK, let's do wait and see what we've got. 43 00:03:37,280 --> 00:03:38,390 Click over here to build. 44 00:03:43,510 --> 00:03:44,170 It's built in. 45 00:03:47,270 --> 00:03:51,660 Oh, OK, so I forgot to change the ID of the function. 46 00:03:52,190 --> 00:03:56,870 He has to be the mutex ID you are to ID a copy this. 47 00:03:57,910 --> 00:04:02,560 Replace it here and replace it here, let's build. 48 00:04:07,380 --> 00:04:08,280 Click here to build. 49 00:04:16,360 --> 00:04:24,970 Oh, sorry about that, I forgot to replace in the release, so we acquire and then we release, we 50 00:04:24,970 --> 00:04:26,560 acquire and then we release. 51 00:04:30,990 --> 00:04:31,770 We had to build. 52 00:04:46,720 --> 00:04:56,050 It's pure successfully, we're going to run this right click over here, I'll see dbag us SDM 30 to. 53 00:04:57,340 --> 00:04:58,840 So like this, forty three. 54 00:05:01,160 --> 00:05:02,960 It's opening, I say, OK. 55 00:05:12,040 --> 00:05:13,210 Well, click here to switch. 56 00:05:21,860 --> 00:05:22,360 Then. 57 00:05:23,630 --> 00:05:27,200 I screw this over here, I'll minimize this. 58 00:05:31,540 --> 00:05:37,930 I'm going to clear this and then I'll pull this over here and then I'll click to run. 59 00:05:42,950 --> 00:05:43,930 Nothing is running. 60 00:05:44,360 --> 00:05:45,590 Let's pause and see. 61 00:05:48,220 --> 00:05:52,150 How were you at, says, waiting for the UDS? 62 00:05:53,750 --> 00:05:54,270 OK. 63 00:05:54,440 --> 00:05:55,520 The port is closed. 64 00:05:56,560 --> 00:05:59,360 I'll click to run and then open up ports for the. 65 00:06:00,440 --> 00:06:03,160 As you can see, we have the same results as I was. 66 00:06:04,160 --> 00:06:06,260 OK, so this how to use the mutex. 67 00:06:06,950 --> 00:06:10,190 So there is and I'll see you later. 68 00:06:10,220 --> 00:06:10,960 Have a nice day.