windows: Implement WaitForMultipleObjects
This is a very classic and highly useful Windows API that I'm surprised
it's still not here.
Change-Id: If54319099cd94dd727126c579dd5a681979321cd
Reviewed-on: https://go-review.googlesource.com/c/160937
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
diff --git a/windows/syscall_windows.go b/windows/syscall_windows.go
index 8a00b71..f72fa55 100644
--- a/windows/syscall_windows.go
+++ b/windows/syscall_windows.go
@@ -172,6 +172,7 @@
//sys GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error)
//sys DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error)
//sys WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff]
+//sys waitForMultipleObjects(count uint32, handles uintptr, waitAll bool, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff] = WaitForMultipleObjects
//sys GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPathW
//sys CreatePipe(readhandle *Handle, writehandle *Handle, sa *SecurityAttributes, size uint32) (err error)
//sys GetFileType(filehandle Handle) (n uint32, err error)
@@ -589,6 +590,18 @@
return procSetFileCompletionNotificationModes.Find()
}
+func WaitForMultipleObjects(handles []Handle, waitAll bool, waitMilliseconds uint32) (event uint32, err error) {
+ // Every other win32 array API takes arguments as "pointer, count", except for this function. So we
+ // can't declare it as a usual [] type, because mksyscall will use the opposite order. We therefore
+ // trivially stub this ourselves.
+
+ var handlePtr *Handle
+ if len(handles) > 0 {
+ handlePtr = &handles[0]
+ }
+ return waitForMultipleObjects(uint32(len(handles)), uintptr(unsafe.Pointer(handlePtr)), waitAll, waitMilliseconds)
+}
+
// net api calls
const socket_error = uintptr(^uint32(0))
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index fc56aec..e4b54e2 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -112,6 +112,7 @@
procGetProcessTimes = modkernel32.NewProc("GetProcessTimes")
procDuplicateHandle = modkernel32.NewProc("DuplicateHandle")
procWaitForSingleObject = modkernel32.NewProc("WaitForSingleObject")
+ procWaitForMultipleObjects = modkernel32.NewProc("WaitForMultipleObjects")
procGetTempPathW = modkernel32.NewProc("GetTempPathW")
procCreatePipe = modkernel32.NewProc("CreatePipe")
procGetFileType = modkernel32.NewProc("GetFileType")
@@ -1084,6 +1085,25 @@
return
}
+func waitForMultipleObjects(count uint32, handles uintptr, waitAll bool, waitMilliseconds uint32) (event uint32, err error) {
+ var _p0 uint32
+ if waitAll {
+ _p0 = 1
+ } else {
+ _p0 = 0
+ }
+ r0, _, e1 := syscall.Syscall6(procWaitForMultipleObjects.Addr(), 4, uintptr(count), uintptr(handles), uintptr(_p0), uintptr(waitMilliseconds), 0, 0)
+ event = uint32(r0)
+ if event == 0xffffffff {
+ if e1 != 0 {
+ err = errnoErr(e1)
+ } else {
+ err = syscall.EINVAL
+ }
+ }
+ return
+}
+
func GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) {
r0, _, e1 := syscall.Syscall(procGetTempPathW.Addr(), 2, uintptr(buflen), uintptr(unsafe.Pointer(buf)), 0)
n = uint32(r0)
