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windows: Implement WaitForMultipleObjects

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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>
This commit is contained in:
Jason A. Donenfeld
2019-02-04 10:32:48 +00:00
committed by Alex Brainman
parent 7ae0202eb7
commit 980327fe3c
2 changed files with 33 additions and 0 deletions
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windows/syscall_windows.go
+13
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@@ -172,6 +172,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//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 @@ func LoadSetFileCompletionNotificationModes() error {
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))