github.com/alexis81/domosgo@v0.0.0-20191016125037-5aee90a434af/Domos/src/golang.org/x/sys/unix/mmap_unix_test.go (about) 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 // +build darwin dragonfly freebsd linux netbsd openbsd solaris 6 7 package unix_test 8 9 import ( 10 "testing" 11 12 "golang.org/x/sys/unix" 13 ) 14 15 func TestMmap(t *testing.T) { 16 b, err := unix.Mmap(-1, 0, unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE) 17 if err != nil { 18 t.Fatalf("Mmap: %v", err) 19 } 20 if err := unix.Mprotect(b, unix.PROT_READ|unix.PROT_WRITE); err != nil { 21 t.Fatalf("Mprotect: %v", err) 22 } 23 24 b[0] = 42 25 26 if err := unix.Msync(b, unix.MS_SYNC); err != nil { 27 t.Fatalf("Msync: %v", err) 28 } 29 if err := unix.Madvise(b, unix.MADV_DONTNEED); err != nil { 30 t.Fatalf("Madvise: %v", err) 31 } 32 if err := unix.Munmap(b); err != nil { 33 t.Fatalf("Munmap: %v", err) 34 } 35 }