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windows: allow re-enabling priority boost

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The Go runtime disables priority boosting because it interferes with the
scheduler timer threads in some cases. But some apps might want to
re-enable it for specific reasons, so this commit adds the function to
do so.

Change-Id: Ida68b9f2b188560b46c322197461dd06453329e2
Reviewed-on: https://go-review.googlesource.com/c/sys/+/191839
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Jason A. Donenfeld
2019-08-26 06:50:32 -06:00
parent fb81701db8
commit acd9dae8e8
2 changed files with 20 additions and 0 deletions
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1
windows/syscall_windows.go
View File

@@ -269,6 +269,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//sys GenerateConsoleCtrlEvent(ctrlEvent uint32, processGroupID uint32) (err error)
//sys GetProcessId(process Handle) (id uint32, err error)
//sys OpenThread(desiredAccess uint32, inheritHandle bool, threadId uint32) (handle Handle, err error)
//sys SetProcessPriorityBoost(process Handle, disable bool) (err error) = kernel32.SetProcessPriorityBoost
// Volume Management Functions
//sys DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) = DefineDosDeviceW

19
windows/zsyscall_windows.go
View File

@@ -209,6 +209,7 @@ var (
procGenerateConsoleCtrlEvent = modkernel32.NewProc("GenerateConsoleCtrlEvent")
procGetProcessId = modkernel32.NewProc("GetProcessId")
procOpenThread = modkernel32.NewProc("OpenThread")
procSetProcessPriorityBoost = modkernel32.NewProc("SetProcessPriorityBoost")
procDefineDosDeviceW = modkernel32.NewProc("DefineDosDeviceW")
procDeleteVolumeMountPointW = modkernel32.NewProc("DeleteVolumeMountPointW")
procFindFirstVolumeW = modkernel32.NewProc("FindFirstVolumeW")
@@ -2256,6 +2257,24 @@ func OpenThread(desiredAccess uint32, inheritHandle bool, threadId uint32) (hand
return
}
func SetProcessPriorityBoost(process Handle, disable bool) (err error) {
var _p0 uint32
if disable {
_p0 = 1
} else {
_p0 = 0
}
r1, _, e1 := syscall.Syscall(procSetProcessPriorityBoost.Addr(), 2, uintptr(process), uintptr(_p0), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) {
r1, _, e1 := syscall.Syscall(procDefineDosDeviceW.Addr(), 3, uintptr(flags), uintptr(unsafe.Pointer(deviceName)), uintptr(unsafe.Pointer(targetPath)))
if r1 == 0 {