rsc.io/go@v0.0.0-20150416155037-e040fd465409/misc/cgo/testcarchive/src/libgo/libgo.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package main
     6  
     7  import (
     8  	_ "p"
     9  	"syscall"
    10  	"time"
    11  )
    12  
    13  import "C"
    14  
    15  var initCh = make(chan int, 1)
    16  var ranMain bool
    17  
    18  func init() {
    19  	// emulate an exceedingly slow package initialization function
    20  	time.Sleep(100 * time.Millisecond)
    21  	initCh <- 42
    22  }
    23  
    24  func main() { ranMain = true }
    25  
    26  //export DidInitRun
    27  func DidInitRun() bool {
    28  	select {
    29  	case x := <-initCh:
    30  		if x != 42 {
    31  			// Just in case initCh was not correctly made.
    32  			println("want init value of 42, got: ", x)
    33  			syscall.Exit(2)
    34  		}
    35  		return true
    36  	default:
    37  		return false
    38  	}
    39  }
    40  
    41  //export DidMainRun
    42  func DidMainRun() bool { return ranMain }