mirror of
https://github.com/golang/go
synced 2024-11-22 11:24:49 -07:00
0432f289f7
* remember #defined names, so that C.stdout can refer
to the real name (on OS X) __stdoutp.
* better handling of #defined constant expressions
* allow n, err = C.strtol("asdf", 0, 123) to get errno as os.Error
* write all output files to current directory
* don't require gcc output if there was no input
Fixes #533.
Fixes #709.
Fixes #756.
R=r
CC=dho, golang-dev, iant
https://golang.org/cl/1734047
48 lines
928 B
Go
48 lines
928 B
Go
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Compute Fibonacci numbers with two goroutines
|
|
// that pass integers back and forth. No actual
|
|
// concurrency, just threads and synchronization
|
|
// and foreign code on multiple pthreads.
|
|
|
|
package main
|
|
|
|
import (
|
|
"runtime"
|
|
"stdio"
|
|
"strconv"
|
|
)
|
|
|
|
func fibber(c, out chan int64, i int64) {
|
|
// Keep the fibbers in dedicated operating system
|
|
// threads, so that this program tests coordination
|
|
// between pthreads and not just goroutines.
|
|
runtime.LockOSThread()
|
|
|
|
if i == 0 {
|
|
c <- i
|
|
}
|
|
for {
|
|
j := <-c
|
|
stdio.Stdout.WriteString(strconv.Itoa64(j) + "\n")
|
|
out <- j
|
|
<-out
|
|
i += j
|
|
c <- i
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
c := make(chan int64)
|
|
out := make(chan int64)
|
|
go fibber(c, out, 0)
|
|
go fibber(c, out, 1)
|
|
<-out
|
|
for i := 0; i < 90; i++ {
|
|
out <- 1
|
|
<-out
|
|
}
|
|
}
|