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Remove pointers from the stateful-goroutines example.

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The pointers are unnecessary and make the sample slightly more
complicated.

Fixes #221
This commit is contained in:
Eli Bendersky 2019-06-04 15:56:59 -07:00
parent d1886245ba
commit 6d8aa9b50a
3 changed files with 24 additions and 12 deletions
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9
examples/stateful-goroutines/stateful-goroutines.go
View File

@ -28,6 +28,7 @@ type readOp struct {
key int key int
resp chan int resp chan int
} }
type writeOp struct { type writeOp struct {
key int key int
val int val int
@ -43,8 +44,8 @@ func main() {
// The `reads` and `writes` channels will be used by // The `reads` and `writes` channels will be used by
// other goroutines to issue read and write requests, // other goroutines to issue read and write requests,
// respectively. // respectively.
reads := make(chan *readOp) reads := make(chan readOp)
writes := make(chan *writeOp) writes := make(chan writeOp)
// Here is the goroutine that owns the `state`, which // Here is the goroutine that owns the `state`, which
// is a map as in the previous example but now private // is a map as in the previous example but now private
@ -76,7 +77,7 @@ func main() {
for r := 0; r < 100; r++ { for r := 0; r < 100; r++ {
go func() { go func() {
for { for {
read := &readOp{ read := readOp{
key: rand.Intn(5), key: rand.Intn(5),
resp: make(chan int)} resp: make(chan int)}
reads <- read reads <- read
@ -92,7 +93,7 @@ func main() {
for w := 0; w < 10; w++ { for w := 0; w < 10; w++ {
go func() { go func() {
for { for {
write := &writeOp{ write := writeOp{
key: rand.Intn(5), key: rand.Intn(5),
val: rand.Intn(100), val: rand.Intn(100),
resp: make(chan bool)} resp: make(chan bool)}

4
examples/stateful-goroutines/stateful-goroutines.hash
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@ -1,2 +1,2 @@
ff8b7e93a43c284ada17f4387cc5dfeafa3ee316 330fde708b006d5571f9b94e7a63b4fead62bd36
dlfBGF-qff6 DxITfgl__z9

23
public/stateful-goroutines
View File

@ -34,7 +34,7 @@ by exactly 1 goroutine.</p>
</td> </td>
<td class="code leading"> <td class="code leading">
<a href="http://play.golang.org/p/dlfBGF-qff6"><img title="Run code" class="run" src="data:image/png;base64,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" /></a> <a href="http://play.golang.org/p/DxITfgl__z9"><img title="Run code" class="run" src="data:image/png;base64,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" /></a>
<div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span> <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
</pre></div> </pre></div>
@ -76,7 +76,18 @@ goroutine to respond.</p>
<span class="nx">key</span> <span class="kt">int</span> <span class="nx">key</span> <span class="kt">int</span>
<span class="nx">resp</span> <span class="kd">chan</span> <span class="kt">int</span> <span class="nx">resp</span> <span class="kd">chan</span> <span class="kt">int</span>
<span class="p">}</span> <span class="p">}</span>
<span class="kd">type</span> <span class="nx">writeOp</span> <span class="kd">struct</span> <span class="p">{</span> </pre></div>
</td>
</tr>
<tr>
<td class="docs">
</td>
<td class="code leading">
<div class="highlight"><pre><span class="kd">type</span> <span class="nx">writeOp</span> <span class="kd">struct</span> <span class="p">{</span>
<span class="nx">key</span> <span class="kt">int</span> <span class="nx">key</span> <span class="kt">int</span>
<span class="nx">val</span> <span class="kt">int</span> <span class="nx">val</span> <span class="kt">int</span>
<span class="nx">resp</span> <span class="kd">chan</span> <span class="kt">bool</span> <span class="nx">resp</span> <span class="kd">chan</span> <span class="kt">bool</span>
@ -121,8 +132,8 @@ respectively.</p>
</td> </td>
<td class="code leading"> <td class="code leading">
<div class="highlight"><pre> <span class="nx">reads</span> <span class="o">:=</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="o">*</span><span class="nx">readOp</span><span class="p">)</span> <div class="highlight"><pre> <span class="nx">reads</span> <span class="o">:=</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="nx">readOp</span><span class="p">)</span>
<span class="nx">writes</span> <span class="o">:=</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="o">*</span><span class="nx">writeOp</span><span class="p">)</span> <span class="nx">writes</span> <span class="o">:=</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="nx">writeOp</span><span class="p">)</span>
</pre></div> </pre></div>
</td> </td>
@ -174,7 +185,7 @@ result over the provided <code>resp</code> channel.</p>
<div class="highlight"><pre> <span class="k">for</span> <span class="nx">r</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">r</span> <span class="p">&lt;</span> <span class="mi">100</span><span class="p">;</span> <span class="nx">r</span><span class="o">++</span> <span class="p">{</span> <div class="highlight"><pre> <span class="k">for</span> <span class="nx">r</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">r</span> <span class="p">&lt;</span> <span class="mi">100</span><span class="p">;</span> <span class="nx">r</span><span class="o">++</span> <span class="p">{</span>
<span class="k">go</span> <span class="kd">func</span><span class="p">()</span> <span class="p">{</span> <span class="k">go</span> <span class="kd">func</span><span class="p">()</span> <span class="p">{</span>
<span class="k">for</span> <span class="p">{</span> <span class="k">for</span> <span class="p">{</span>
<span class="nx">read</span> <span class="o">:=</span> <span class="o">&amp;</span><span class="nx">readOp</span><span class="p">{</span> <span class="nx">read</span> <span class="o">:=</span> <span class="nx">readOp</span><span class="p">{</span>
<span class="nx">key</span><span class="p">:</span> <span class="nx">rand</span><span class="p">.</span><span class="nx">Intn</span><span class="p">(</span><span class="mi">5</span><span class="p">),</span> <span class="nx">key</span><span class="p">:</span> <span class="nx">rand</span><span class="p">.</span><span class="nx">Intn</span><span class="p">(</span><span class="mi">5</span><span class="p">),</span>
<span class="nx">resp</span><span class="p">:</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="kt">int</span><span class="p">)}</span> <span class="nx">resp</span><span class="p">:</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="kt">int</span><span class="p">)}</span>
<span class="nx">reads</span> <span class="o">&lt;-</span> <span class="nx">read</span> <span class="nx">reads</span> <span class="o">&lt;-</span> <span class="nx">read</span>
@ -200,7 +211,7 @@ approach.</p>
<div class="highlight"><pre> <span class="k">for</span> <span class="nx">w</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">w</span> <span class="p">&lt;</span> <span class="mi">10</span><span class="p">;</span> <span class="nx">w</span><span class="o">++</span> <span class="p">{</span> <div class="highlight"><pre> <span class="k">for</span> <span class="nx">w</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">w</span> <span class="p">&lt;</span> <span class="mi">10</span><span class="p">;</span> <span class="nx">w</span><span class="o">++</span> <span class="p">{</span>
<span class="k">go</span> <span class="kd">func</span><span class="p">()</span> <span class="p">{</span> <span class="k">go</span> <span class="kd">func</span><span class="p">()</span> <span class="p">{</span>
<span class="k">for</span> <span class="p">{</span> <span class="k">for</span> <span class="p">{</span>
<span class="nx">write</span> <span class="o">:=</span> <span class="o">&amp;</span><span class="nx">writeOp</span><span class="p">{</span> <span class="nx">write</span> <span class="o">:=</span> <span class="nx">writeOp</span><span class="p">{</span>
<span class="nx">key</span><span class="p">:</span> <span class="nx">rand</span><span class="p">.</span><span class="nx">Intn</span><span class="p">(</span><span class="mi">5</span><span class="p">),</span> <span class="nx">key</span><span class="p">:</span> <span class="nx">rand</span><span class="p">.</span><span class="nx">Intn</span><span class="p">(</span><span class="mi">5</span><span class="p">),</span>
<span class="nx">val</span><span class="p">:</span> <span class="nx">rand</span><span class="p">.</span><span class="nx">Intn</span><span class="p">(</span><span class="mi">100</span><span class="p">),</span> <span class="nx">val</span><span class="p">:</span> <span class="nx">rand</span><span class="p">.</span><span class="nx">Intn</span><span class="p">(</span><span class="mi">100</span><span class="p">),</span>
<span class="nx">resp</span><span class="p">:</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="kt">bool</span><span class="p">)}</span> <span class="nx">resp</span><span class="p">:</span> <span class="nb">make</span><span class="p">(</span><span class="kd">chan</span> <span class="kt">bool</span><span class="p">)}</span>