src/cmd/cgo/internal/test/issue8517_windows.go

   1 // Copyright 2014 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 //void testHandleLeaks();
   8 import "C"
   9
  10 import (
  11         "syscall"
  12         "testing"
  13         "unsafe"
  14 )
  15
  16 var issue8517counter int
  17
  18 var (
  19         kernel32              = syscall.MustLoadDLL("kernel32.dll")
  20         getProcessHandleCount = kernel32.MustFindProc("GetProcessHandleCount")
  21 )
  22
  23 func processHandleCount(t *testing.T) int {
  24         const current_process = ^uintptr(0)
  25         var c uint32
  26         r, _, err := getProcessHandleCount.Call(current_process, uintptr(unsafe.Pointer(&c)))
  27         if r == 0 {
  28                 t.Fatal(err)
  29         }
  30         return int(c)
  31 }
  32
  33 func test8517(t *testing.T) {
  34         c1 := processHandleCount(t)
  35         C.testHandleLeaks()
  36         c2 := processHandleCount(t)
  37         if c1+issue8517counter <= c2 {
  38                 t.Fatalf("too many handles leaked: issue8517counter=%v c1=%v c2=%v", issue8517counter, c1, c2)
  39         }
  40 }
  41
  42 //export testHandleLeaksCallback
  43 func testHandleLeaksCallback() {
  44         issue8517counter++
  45 }