├── 01.go
├── 02.go
├── 1a.go
└── README.md


/01.go:
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 1 | package main
 2 | 
 3 | import "fmt"
 4 | 
 5 | const (
 6 | 	N_INCREMENTS = 10000000
 7 | )
 8 | 
 9 | func main() {
10 | 	
11 | 	counter := 0
12 | 	donechan := make(chan bool)
13 | 
14 | 	go func(done chan<- bool) {
15 | 		for i := 0; i < N_INCREMENTS; i++ {
16 | 			counter++
17 | 		}
18 | 		done <- true
19 | 	}(donechan)
20 | 	
21 | 	for i := 0; i < N_INCREMENTS; i++ {
22 | 		counter++
23 | 	}
24 | 	
25 | 	_ = <-donechan
26 | 	
27 | 	fmt.Println("Count: ", counter)
28 | 
29 | }


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/02.go:
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 1 | package main
 2 | 
 3 | import (
 4 | 	"fmt"
 5 | 	"sync"
 6 | )
 7 | 
 8 | const (
 9 | 	N_INCREMENTS = 10000000
10 | )
11 | 
12 | func main() {
13 | 	
14 | 	counter := 0
15 | 	donechan := make(chan bool)
16 | 	var m sync.Mutex
17 | 
18 | 	go func(done chan<- bool) {
19 | 		for i := 0; i < N_INCREMENTS; i++ {
20 | 			m.Lock()
21 | 			counter++
22 | 			m.Unlock()
23 | 		}
24 | 		done <- true
25 | 	}(donechan)
26 | 	
27 | 	for i := 0; i < N_INCREMENTS; i++ {
28 | 		m.Lock()
29 | 		counter++
30 | 		m.Unlock()
31 | 	}
32 | 	
33 | 	_ = <-donechan
34 | 	
35 | 	fmt.Println("Count: ", counter)
36 | 
37 | }


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/1a.go:
--------------------------------------------------------------------------------
 1 | package main
 2 | 
 3 | import (
 4 | 	"fmt"
 5 | 	"sync"
 6 | )
 7 | 
 8 | const (
 9 | 	N_INCREMENTS = 100000000
10 | )
11 | 
12 | func main() {
13 | 
14 | 	counter := 0
15 | 	donechan := make(chan bool)
16 | 	var m sync.Mutex
17 | 
18 | 	go func(done chan<- bool) {
19 | 		for i := 0; i < N_INCREMENTS; i++ {
20 | 			m.Lock()
21 | 			counter++
22 | 			m.Unlock()
23 | 		}
24 | 		done <- true
25 | 	}(donechan)
26 | 
27 | 	for i := 0; i < N_INCREMENTS; i++ {
28 | 		m.Lock()
29 | 		counter++
30 | 		m.Unlock()
31 | 	}
32 | 
33 | 	_ = <-donechan
34 | 
35 | 
36 | 	fmt.Println("Counter: ", counter)
37 | 
38 | }


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/README.md:
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 1 | intro-to-go2
 2 | ============
 3 | 
 4 | This repository contains code snippets discussed in 15-440, lecture 5 (given on 1/28/2014).
 5 | 
 6 | To clone this repository, execute the following command:
 7 | 
 8 | ```sh
 9 | git clone https://github.com/cmu440/intro-to-go2
10 | ```
11 | 
12 | To run the file named `01.go`, simply execute:
13 | 
14 | ```sh
15 | go run 01.go
16 | ```
17 | 


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