libgo/misc/cgo/test/cthread.go

   1 // Copyright 2013 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 cgotest
   6
   7 // extern void doAdd(int, int);
   8 import "C"
   9
  10 import (
  11         "runtime"
  12         "sync"
  13         "testing"
  14 )
  15
  16 var sum struct {
  17         sync.Mutex
  18         i int
  19 }
  20
  21 //export Add
  22 func Add(x int) {
  23         defer func() {
  24                 recover()
  25         }()
  26         sum.Lock()
  27         sum.i += x
  28         sum.Unlock()
  29         var p *int
  30         *p = 2
  31 }
  32
  33 func testCthread(t *testing.T) {
  34         if runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
  35                 t.Skip("the iOS exec wrapper is unable to properly handle the panic from Add")
  36         }
  37         sum.i = 0
  38         C.doAdd(10, 6)
  39
  40         want := 10 * (10 - 1) / 2 * 6
  41         if sum.i != want {
  42                 t.Fatalf("sum=%d, want %d", sum.i, want)
  43         }
  44 }