// Copyright 2018 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.

package unix_test

import (
	"testing"
	"time"

	"golang.org/x/sys/unix"
)

func TestPpoll(t *testing.T) {
	defer chtmpdir(t)()
	f, cleanup := mktmpfifo(t)
	defer cleanup()

	const timeout = 100 * time.Millisecond

	ok := make(chan bool, 1)
	go func() {
		select {
		case <-time.After(10 * timeout):
			t.Errorf("Ppoll: failed to timeout after %d", 10*timeout)
		case <-ok:
		}
	}()

	fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}}
	timeoutTs := unix.NsecToTimespec(int64(timeout))
	n, err := unix.Ppoll(fds, &timeoutTs, nil)
	ok <- true
	if err != nil {
		t.Errorf("Ppoll: unexpected error: %v", err)
		return
	}
	if n != 0 {
		t.Errorf("Ppoll: wrong number of events: got %v, expected %v", n, 0)
		return
	}
}

func TestSysctlUvmexp(t *testing.T) {
	uvm, err := unix.SysctlUvmexp("vm.uvmexp")
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("free = %v", uvm.Free)
}