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windows: add mutex management functions

Browse Source 
Indeed Go has mutexes of its own, but these are considerably
different from the native Windows ones, that can work across processes
and be put in various namespaces. They're an essential part of Windows
systems programming and important for interfacing with various external
interfaces.

Change-Id: I03987800ed1c134442321678c2c7d7aa359ecb36
Reviewed-on: https://go-review.googlesource.com/c/sys/+/192497
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
2019-08-29 17:20:26 -06:00
parent 5fe476d890
commit 19e00faab6
3 changed files with 93 additions and 0 deletions
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4
windows/syscall_windows.go
View File

@@ -257,6 +257,10 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//sys SetEvent(event Handle) (err error) = kernel32.SetEvent
//sys ResetEvent(event Handle) (err error) = kernel32.ResetEvent
//sys PulseEvent(event Handle) (err error) = kernel32.PulseEvent
//sys CreateMutex(mutexAttrs *SecurityAttributes, initialOwner bool, name *uint16) (handle Handle, err error) = kernel32.CreateMutexW
//sys CreateMutexEx(mutexAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateMutexExW
//sys OpenMutex(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenMutexW
//sys ReleaseMutex(mutex Handle) (err error) = kernel32.ReleaseMutex
//sys SleepEx(milliseconds uint32, alertable bool) (ret uint32) = kernel32.SleepEx
//sys CreateJobObject(jobAttr *SecurityAttributes, name *uint16) (handle Handle, err error) = kernel32.CreateJobObjectW
//sys AssignProcessToJobObject(job Handle, process Handle) (err error) = kernel32.AssignProcessToJobObject

22
windows/types_windows.go
View File

@@ -1190,6 +1190,28 @@ const (
REG_QWORD = REG_QWORD_LITTLE_ENDIAN
)
const (
EVENT_MODIFY_STATE = 0x0002
EVENT_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | 0x3
MUTANT_QUERY_STATE = 0x0001
MUTANT_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | MUTANT_QUERY_STATE
SEMAPHORE_MODIFY_STATE = 0x0002
SEMAPHORE_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | 0x3
TIMER_QUERY_STATE = 0x0001
TIMER_MODIFY_STATE = 0x0002
TIMER_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | TIMER_QUERY_STATE | TIMER_MODIFY_STATE
MUTEX_MODIFY_STATE = MUTANT_QUERY_STATE
MUTEX_ALL_ACCESS = MUTANT_ALL_ACCESS
CREATE_EVENT_MANUAL_RESET = 0x1
CREATE_EVENT_INITIAL_SET = 0x2
CREATE_MUTEX_INITIAL_OWNER = 0x1
)
type AddrinfoW struct {
Flags int32
Family int32

67
windows/zsyscall_windows.go
View File

@@ -197,6 +197,10 @@ var (
procSetEvent = modkernel32.NewProc("SetEvent")
procResetEvent = modkernel32.NewProc("ResetEvent")
procPulseEvent = modkernel32.NewProc("PulseEvent")
procCreateMutexW = modkernel32.NewProc("CreateMutexW")
procCreateMutexExW = modkernel32.NewProc("CreateMutexExW")
procOpenMutexW = modkernel32.NewProc("OpenMutexW")
procReleaseMutex = modkernel32.NewProc("ReleaseMutex")
procSleepEx = modkernel32.NewProc("SleepEx")
procCreateJobObjectW = modkernel32.NewProc("CreateJobObjectW")
procAssignProcessToJobObject = modkernel32.NewProc("AssignProcessToJobObject")
@@ -2109,6 +2113,69 @@ func PulseEvent(event Handle) (err error) {
return
}
func CreateMutex(mutexAttrs *SecurityAttributes, initialOwner bool, name *uint16) (handle Handle, err error) {
var _p0 uint32
if initialOwner {
_p0 = 1
} else {
_p0 = 0
}
r0, _, e1 := syscall.Syscall(procCreateMutexW.Addr(), 3, uintptr(unsafe.Pointer(mutexAttrs)), uintptr(_p0), uintptr(unsafe.Pointer(name)))
handle = Handle(r0)
if handle == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func CreateMutexEx(mutexAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) {
r0, _, e1 := syscall.Syscall6(procCreateMutexExW.Addr(), 4, uintptr(unsafe.Pointer(mutexAttrs)), uintptr(unsafe.Pointer(name)), uintptr(flags), uintptr(desiredAccess), 0, 0)
handle = Handle(r0)
if handle == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func OpenMutex(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) {
var _p0 uint32
if inheritHandle {
_p0 = 1
} else {
_p0 = 0
}
r0, _, e1 := syscall.Syscall(procOpenMutexW.Addr(), 3, uintptr(desiredAccess), uintptr(_p0), uintptr(unsafe.Pointer(name)))
handle = Handle(r0)
if handle == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func ReleaseMutex(mutex Handle) (err error) {
r1, _, e1 := syscall.Syscall(procReleaseMutex.Addr(), 1, uintptr(mutex), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func SleepEx(milliseconds uint32, alertable bool) (ret uint32) {
var _p0 uint32
if alertable {