unix: add Poll function on NetBSD

Tested with TestPoll extracted from syscall_linux_test.go. Once Poll is
supported on all OSes this test can be moved to syscall_unix_test.go.

Change-Id: I61ec50c5ea7d6db43f7688ed925d6ed26a6bbc3a
Reviewed-on: https://go-review.googlesource.com/73650
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/syscall_netbsd.go

@@ -124,6 +124,15 @@ func sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 	return -1, ENOSYS
 }
 
+//sys   poll(fds *PollFd, nfds int, timeout int) (n int, err error)
+
+func Poll(fds []PollFd, timeout int) (n int, err error) {
+	if len(fds) == 0 {
+		return poll(nil, 0, timeout)
+	}
+	return poll(&fds[0], len(fds), timeout)
+}
+
 /*
  * Exposed directly
  */
@@ -422,7 +431,6 @@ func sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 // ntp_adjtime
 // pmc_control
 // pmc_get_info
-// poll
 // pollts
 // preadv
 // profil

unix/types_netbsd.go

@@ -17,6 +17,7 @@ package unix
 #define KERNEL
 #include <dirent.h>
 #include <fcntl.h>
+#include <poll.h>
 #include <signal.h>
 #include <termios.h>
 #include <stdio.h>
@@ -234,6 +235,23 @@ const (
 	AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW
 )
 
+// poll
+
+type PollFd C.struct_pollfd
+
+const (
+	POLLERR    = C.POLLERR
+	POLLHUP    = C.POLLHUP
+	POLLIN     = C.POLLIN
+	POLLNVAL   = C.POLLNVAL
+	POLLOUT    = C.POLLOUT
+	POLLPRI    = C.POLLPRI
+	POLLRDBAND = C.POLLRDBAND
+	POLLRDNORM = C.POLLRDNORM
+	POLLWRBAND = C.POLLWRBAND
+	POLLWRNORM = C.POLLWRNORM
+)
+
 // Sysctl
 
 type Sysctlnode C.struct_sysctlnode

unix/zsyscall_netbsd_386.go

@@ -395,6 +395,17 @@ func getdents(fd int, buf []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
+	r0, _, e1 := Syscall(SYS_POLL, uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_netbsd_amd64.go

@@ -395,6 +395,17 @@ func getdents(fd int, buf []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
+	r0, _, e1 := Syscall(SYS_POLL, uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_netbsd_arm.go

@@ -395,6 +395,17 @@ func getdents(fd int, buf []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
+	r0, _, e1 := Syscall(SYS_POLL, uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/ztypes_netbsd_386.go

@@ -1,5 +1,5 @@
-// Created by cgo -godefs - DO NOT EDIT
-// cgo -godefs types_netbsd.go
+// cgo -godefs types_netbsd.go | go run mkpost.go
+// Code generated by the command above; see README.md. DO NOT EDIT.
 
 // +build 386,netbsd
 
@@ -387,6 +387,25 @@ const (
 	AT_SYMLINK_NOFOLLOW = 0x200
 )
 
+type PollFd struct {
+	Fd      int32
+	Events  int16
+	Revents int16
+}
+
+const (
+	POLLERR    = 0x8
+	POLLHUP    = 0x10
+	POLLIN     = 0x1
+	POLLNVAL   = 0x20
+	POLLOUT    = 0x4
+	POLLPRI    = 0x2
+	POLLRDBAND = 0x80
+	POLLRDNORM = 0x40
+	POLLWRBAND = 0x100
+	POLLWRNORM = 0x4
+)
+
 type Sysctlnode struct {
 	Flags           uint32
 	Num             int32

unix/ztypes_netbsd_amd64.go

@@ -1,5 +1,5 @@
-// Created by cgo -godefs - DO NOT EDIT
-// cgo -godefs types_netbsd.go
+// cgo -godefs types_netbsd.go | go run mkpost.go
+// Code generated by the command above; see README.md. DO NOT EDIT.
 
 // +build amd64,netbsd
 
@@ -394,6 +394,25 @@ const (
 	AT_SYMLINK_NOFOLLOW = 0x200
 )
 
+type PollFd struct {
+	Fd      int32
+	Events  int16
+	Revents int16
+}
+
+const (
+	POLLERR    = 0x8
+	POLLHUP    = 0x10
+	POLLIN     = 0x1
+	POLLNVAL   = 0x20
+	POLLOUT    = 0x4
+	POLLPRI    = 0x2
+	POLLRDBAND = 0x80
+	POLLRDNORM = 0x40
+	POLLWRBAND = 0x100
+	POLLWRNORM = 0x4
+)
+
 type Sysctlnode struct {
 	Flags           uint32
 	Num             int32

unix/ztypes_netbsd_arm.go

@@ -1,5 +1,5 @@
-// Created by cgo -godefs - DO NOT EDIT
-// cgo -godefs types_netbsd.go
+// cgo -godefs types_netbsd.go | go run mkpost.go
+// Code generated by the command above; see README.md. DO NOT EDIT.
 
 // +build arm,netbsd
 
@@ -392,6 +392,25 @@ const (
 	AT_SYMLINK_NOFOLLOW = 0x200
 )
 
+type PollFd struct {
+	Fd      int32
+	Events  int16
+	Revents int16
+}
+
+const (
+	POLLERR    = 0x8
+	POLLHUP    = 0x10
+	POLLIN     = 0x1
+	POLLNVAL   = 0x20
+	POLLOUT    = 0x4
+	POLLPRI    = 0x2
+	POLLRDBAND = 0x80
+	POLLRDNORM = 0x40
+	POLLWRBAND = 0x100
+	POLLWRNORM = 0x4
+)
+
 type Sysctlnode struct {
 	Flags           uint32
 	Num             int32