1 | package main |
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2 | |
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3 | import ( |
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4 | "fmt" |
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5 | "sync" |
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6 | "time" |
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7 | "runtime" |
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8 | ) |
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9 | |
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10 | var Channels, ChannelSize int = 2, 100 |
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11 | var cons_done, prod_done bool = false, false; |
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12 | var total_operations uint64 = 0 |
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13 | var m sync.Mutex |
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14 | |
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15 | var prodJoin chan int = make(chan int) |
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16 | var consJoin chan int = make(chan int) |
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17 | |
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18 | func selectconsumer( chans [] chan uint64 ) { |
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19 | var count uint64 = 0 |
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20 | for { |
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21 | if cons_done { break } |
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22 | select { |
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23 | case <- chans[0]: |
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24 | case <- chans[1]: |
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25 | } |
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26 | if ! prod_done { count++ } |
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27 | } |
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28 | m.Lock() |
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29 | total_operations += count |
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30 | m.Unlock() |
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31 | consJoin <- 0 |
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32 | } |
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33 | |
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34 | func consumer( chans [] chan uint64 ) { |
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35 | var count uint64 = 0 |
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36 | for { |
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37 | if cons_done { break } |
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38 | <-chans[1] |
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39 | if ! prod_done { count++ } |
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40 | } |
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41 | m.Lock() |
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42 | total_operations += count |
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43 | m.Unlock() |
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44 | consJoin <- 0 |
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45 | } |
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46 | |
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47 | func selectproducer( chans [] chan uint64 ) { |
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48 | var count uint64 = 0 |
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49 | var checksum uint64 = 0 |
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50 | for { |
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51 | if prod_done { break } |
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52 | checksum = checksum ^ count |
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53 | select { |
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54 | case chans[0] <- count: |
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55 | case chans[1] <- count: |
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56 | } |
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57 | count++ |
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58 | } |
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59 | prodJoin <- 0 |
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60 | } |
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61 | |
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62 | func producer( chans [] chan uint64 ) { |
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63 | var count uint64 = 0 |
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64 | var checksum uint64 = 0 |
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65 | for { |
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66 | if prod_done { break } |
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67 | checksum = checksum ^ count |
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68 | chans[1] <- count |
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69 | count++ |
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70 | } |
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71 | prodJoin <- 0 |
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72 | } |
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73 | |
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74 | |
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75 | func main() { |
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76 | runtime.GOMAXPROCS( 4 ); |
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77 | |
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78 | // fmt.Println("Processors: ",Processors," Channels: ",Channels," ProdsPerChan: ",ProdsPerChan," ConsPerChan: ",ConsPerChan," Channel Size: ",ChannelSize) |
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79 | |
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80 | chans := make( [] chan uint64, Channels ) |
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81 | for i := range chans { |
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82 | chans[i] = make(chan uint64, ChannelSize) |
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83 | } |
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84 | |
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85 | |
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86 | go selectproducer( chans ) |
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87 | go selectconsumer( chans ) |
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88 | go producer( chans ) |
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89 | go consumer( chans ) |
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90 | |
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91 | |
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92 | // wait 10 seconds |
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93 | time.Sleep(time.Second * 10) |
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94 | // fmt.Println("prod done\n") |
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95 | prod_done = true |
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96 | for j := 0; j < 2; j++ { |
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97 | <-prodJoin |
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98 | } |
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99 | // fmt.Println("cons done\n") |
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100 | cons_done = true |
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101 | for i := range chans { |
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102 | close(chans[i]) |
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103 | } |
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104 | |
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105 | for j := 0; j < 2; j++{ |
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106 | <-consJoin |
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107 | } |
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108 | fmt.Println(total_operations) |
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109 | } |
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