Created
February 28, 2023 03:51
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// custom channels in go | |
// I learned how go-channels can be implemented in C++ and decided to make it in go haha wtf | |
// I saw this https://st.xorian.net/blog/2012/08/go-style-channel-in-c/ great article | |
package main | |
import ( | |
"log" | |
"sync" | |
) | |
type Channel[T any] struct { | |
mu sync.Mutex | |
queue []T | |
closed bool | |
} | |
func NewChannel[T any]() *Channel[T] { | |
return &Channel[T]{} | |
} | |
func (c *Channel[T]) Set(v T) { | |
c.mu.Lock() | |
defer c.mu.Unlock() | |
if c.closed { | |
log.Panic("channel is closed") | |
} | |
c.queue = append(c.queue, v) | |
} | |
func (c *Channel[T]) Get(v *T) bool { | |
c.mu.Lock() | |
defer c.mu.Unlock() | |
if len(c.queue) == 0 { | |
return false | |
} | |
*v = c.queue[0] | |
c.queue = c.queue[1:] | |
return true | |
} | |
func (c *Channel[T]) Close() { | |
c.mu.Lock() | |
defer c.mu.Unlock() | |
c.closed = true | |
} | |
func main() { | |
channel := NewChannel[int]() | |
wg := sync.WaitGroup{} | |
wg.Add(1) | |
go func() { | |
for i := 0; i < 5; i++ { | |
channel.Set(i) | |
} | |
channel.Close() | |
wg.Done() | |
}() | |
wg.Wait() | |
x := 0 | |
for channel.Get(&x) { | |
println(x) | |
} | |
} |
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