syscall: mingw Sleep

R=rsc, brainman
CC=golang-dev
https://golang.org/cl/961047

src/pkg/syscall/syscall_mingw.go

@@ -121,9 +121,18 @@ func getSysProcAddr(m uint32, pname string) uintptr {
 //sys	GetComputerName(buf *uint16, n *uint32) (ok bool, errno int) = GetComputerNameW
 //sys	SetEndOfFile(handle int32) (ok bool, errno int)
 //sys	GetSystemTimeAsFileTime(time *Filetime)
+//sys   sleep(msec uint32) = Sleep
 
 // syscall interface implementation for other packages
 
+func Sleep(nsec int64) (errno int) {
+	nsec += 999999 // round up to milliseconds
+	msec := uint32(nsec / 1e6)
+	sleep(msec)
+	errno = 0
+	return
+}
+
 func Errstr(errno int) string {
 	if errno == EMINGW {
 		return "not supported by windows"

src/pkg/syscall/zsyscall_mingw_386.go

-// mksyscall_mingw.sh -l32 syscall_mingw.go syscall_mingw_386.go
+// mksyscall_mingw.sh -l32 syscall_mingw.go zsyscall_mingw_386.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
@@ -33,6 +33,7 @@ var (
 	procGetComputerNameW           = getSysProcAddr(modKERNEL32, "GetComputerNameW")
 	procSetEndOfFile               = getSysProcAddr(modKERNEL32, "SetEndOfFile")
 	procGetSystemTimeAsFileTime    = getSysProcAddr(modKERNEL32, "GetSystemTimeAsFileTime")
+	procSleep                      = getSysProcAddr(modKERNEL32, "Sleep")
 )
 
 func GetLastError() (lasterrno int) {
@@ -315,3 +316,8 @@ func GetSystemTimeAsFileTime(time *Filetime) {
 	Syscall(procGetSystemTimeAsFileTime, uintptr(unsafe.Pointer(time)), 0, 0)
 	return
 }
+
+func sleep(msec uint32) {
+	Syscall(procSleep, uintptr(msec), 0, 0)
+	return
+}