Commit 33101926 authored by Rob Pike's avatar Rob Pike

channel tests with new syntax

SVN=127436
parent f550cd67
...@@ -13,22 +13,22 @@ const N = 10 ...@@ -13,22 +13,22 @@ const N = 10
func AsynchFifo() { func AsynchFifo() {
ch := new(chan int, N); ch := new(chan int, N);
for i := 0; i < N; i++ { for i := 0; i < N; i++ {
>ch = i ch -< i
} }
for i := 0; i < N; i++ { for i := 0; i < N; i++ {
if <ch != i { if <-ch != i {
print "bad receive\n"; print "bad receive\n";
sys.exit(1); sys.exit(1);
} }
} }
} }
func Chain(ch *chan< int, val int, in *chan< int, out *chan> int) { func Chain(ch *chan<- int, val int, in *chan<- int, out *chan-< int) {
BUG := <in; <-in;
if <ch != val { if <-ch != val {
panic val; panic val
} }
>out = 1; out -< 1
} }
// thread together a daisy chain to read the elements in sequence // thread together a daisy chain to read the elements in sequence
...@@ -41,9 +41,9 @@ func SynchFifo() { ...@@ -41,9 +41,9 @@ func SynchFifo() {
go Chain(ch, i, in, out); go Chain(ch, i, in, out);
in = out; in = out;
} }
>start = 0; start -< 0;
for i := 0; i < N; i++ { for i := 0; i < N; i++ {
>ch = i ch -< i
} }
} }
......
...@@ -10,30 +10,30 @@ ...@@ -10,30 +10,30 @@
package main package main
// Send the sequence 2, 3, 4, ... to channel 'ch'. // Send the sequence 2, 3, 4, ... to channel 'ch'.
func Generate(ch *chan> int) { func Generate(ch *chan-< int) {
for i := 2; i<100; i++ { for i := 2; ; i++ {
>ch = i // Send 'i' to channel 'ch'. ch -< i // Send 'i' to channel 'ch'.
} }
} }
// Copy the values from channel 'in' to channel 'out', // Copy the values from channel 'in' to channel 'out',
// removing those divisible by 'prime'. // removing those divisible by 'prime'.
func Filter(in *chan< int, out *chan> int, prime int) { func Filter(in *chan<- int, out *chan-< int, prime int) {
for { for {
i := <in // Receive value of new variable 'i' from 'in'. i := <-in // Receive value of new variable 'i' from 'in'.
if i % prime != 0 { if i % prime != 0 {
>out = i // Send 'i' to channel 'out'. out -< i // Send 'i' to channel 'out'.
} }
} }
} }
// The prime sieve: Daisy-chain Filter processes together. // The prime sieve: Daisy-chain Filter processes together.
func Sieve(primes *chan> int) { func Sieve() {
ch := new(chan int); // Create a new channel. ch := new(chan int); // Create a new channel.
go Generate(ch); // Start Generate() as a subprocess. go Generate(ch); // Start Generate() as a subprocess.
for { for {
prime := <ch; prime := <-ch;
>primes = prime; print prime, "\n";
ch1 := new(chan int); ch1 := new(chan int);
go Filter(ch, ch1, prime); go Filter(ch, ch1, prime);
ch = ch1 ch = ch1
...@@ -43,30 +43,30 @@ func Sieve(primes *chan> int) { ...@@ -43,30 +43,30 @@ func Sieve(primes *chan> int) {
func main() { func main() {
primes := new(chan int); primes := new(chan int);
go Sieve(primes); go Sieve(primes);
if <primes != 2 { panic 2 } if <-primes != 2 { panic 2 }
if <primes != 3 { panic 3 } if <-primes != 3 { panic 3 }
if <primes != 5 { panic 5 } if <-primes != 5 { panic 5 }
if <primes != 7 { panic 7 } if <-primes != 7 { panic 7 }
if <primes != 11 { panic 11 } if <-primes != 11 { panic 11 }
if <primes != 13 { panic 13 } if <-primes != 13 { panic 13 }
if <primes != 17 { panic 17 } if <-primes != 17 { panic 17 }
if <primes != 19 { panic 19 } if <-primes != 19 { panic 19 }
if <primes != 23 { panic 23 } if <-primes != 23 { panic 23 }
if <primes != 29 { panic 29 } if <-primes != 29 { panic 29 }
if <primes != 31 { panic 31 } if <-primes != 31 { panic 31 }
if <primes != 37 { panic 37 } if <-primes != 37 { panic 37 }
if <primes != 41 { panic 41 } if <-primes != 41 { panic 41 }
if <primes != 43 { panic 43 } if <-primes != 43 { panic 43 }
if <primes != 47 { panic 47 } if <-primes != 47 { panic 47 }
if <primes != 53 { panic 53 } if <-primes != 53 { panic 53 }
if <primes != 59 { panic 59 } if <-primes != 59 { panic 59 }
if <primes != 61 { panic 61 } if <-primes != 61 { panic 61 }
if <primes != 67 { panic 67 } if <-primes != 67 { panic 67 }
if <primes != 71 { panic 71 } if <-primes != 71 { panic 71 }
if <primes != 73 { panic 73 } if <-primes != 73 { panic 73 }
if <primes != 79 { panic 79 } if <-primes != 79 { panic 79 }
if <primes != 83 { panic 83 } if <-primes != 83 { panic 83 }
if <primes != 89 { panic 89 } if <-primes != 89 { panic 89 }
if <primes != 97 { panic 97 } if <-primes != 97 { panic 97 }
sys.exit(0); sys.exit(0);
} }
...@@ -7,19 +7,19 @@ ...@@ -7,19 +7,19 @@
package main package main
// Send the sequence 2, 3, 4, ... to channel 'ch'. // Send the sequence 2, 3, 4, ... to channel 'ch'.
func Generate(ch *chan> int) { func Generate(ch *chan-< int) {
for i := 2; ; i++ { for i := 2; ; i++ {
>ch = i // Send 'i' to channel 'ch'. ch -< i // Send 'i' to channel 'ch'.
} }
} }
// Copy the values from channel 'in' to channel 'out', // Copy the values from channel 'in' to channel 'out',
// removing those divisible by 'prime'. // removing those divisible by 'prime'.
func Filter(in *chan< int, out *chan> int, prime int) { func Filter(in *chan<- int, out *chan-< int, prime int) {
for { for {
i := <in // Receive value of new variable 'i' from 'in'. i := <-in // Receive value of new variable 'i' from 'in'.
if i % prime != 0 { if i % prime != 0 {
>out = i // Send 'i' to channel 'out'. out -< i // Send 'i' to channel 'out'.
} }
} }
} }
...@@ -29,7 +29,7 @@ func Sieve() { ...@@ -29,7 +29,7 @@ func Sieve() {
ch := new(chan int); // Create a new channel. ch := new(chan int); // Create a new channel.
go Generate(ch); // Start Generate() as a subprocess. go Generate(ch); // Start Generate() as a subprocess.
for { for {
prime := <ch; prime := <-ch;
print prime, "\n"; print prime, "\n";
ch1 := new(chan int); ch1 := new(chan int);
go Filter(ch, ch1, prime); go Filter(ch, ch1, prime);
......
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