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internal/syscall/windows: add LockFileEx and UnlockFileEx for use in cmd/go

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Updates #26794

Change-Id: Ic1d3078176721f3d2e5d8188c234383037babbaf
Reviewed-on: https://go-review.googlesource.com/c/145177
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
This commit is contained in:
Bryan C. Mills 2018-10-16 16:05:51 -04:00
parent bd4b6ca781
commit 3a0d6091d6
2 changed files with 38 additions and 0 deletions
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12
src/internal/syscall/windows/syscall_windows.go
View File

@ -12,7 +12,11 @@ import (
const (
ERROR_SHARING_VIOLATION syscall.Errno = 32
ERROR_LOCK_VIOLATION syscall.Errno = 33
ERROR_NOT_SUPPORTED syscall.Errno = 50
ERROR_CALL_NOT_IMPLEMENTED syscall.Errno = 120
ERROR_INVALID_NAME syscall.Errno = 123
ERROR_LOCK_FAILED syscall.Errno = 167
ERROR_NO_UNICODE_TRANSLATION syscall.Errno = 1113
)
@ -255,6 +259,14 @@ func Rename(oldpath, newpath string) error {
return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING)
}
//sys LockFileEx(file syscall.Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) = kernel32.LockFileEx
//sys UnlockFileEx(file syscall.Handle, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) = kernel32.UnlockFileEx
const (
LOCKFILE_FAIL_IMMEDIATELY = 0x00000001
LOCKFILE_EXCLUSIVE_LOCK = 0x00000002
)
const MB_ERR_INVALID_CHARS = 8
//sys GetACP() (acp uint32) = kernel32.GetACP

26
src/internal/syscall/windows/zsyscall_windows.go
View File

@ -49,6 +49,8 @@ var (
procMoveFileExW = modkernel32.NewProc("MoveFileExW")
procGetModuleFileNameW = modkernel32.NewProc("GetModuleFileNameW")
procWSASocketW = modws2_32.NewProc("WSASocketW")
procLockFileEx = modkernel32.NewProc("LockFileEx")
procUnlockFileEx = modkernel32.NewProc("UnlockFileEx")
procGetACP = modkernel32.NewProc("GetACP")
procGetConsoleCP = modkernel32.NewProc("GetConsoleCP")
procMultiByteToWideChar = modkernel32.NewProc("MultiByteToWideChar")
@ -127,6 +129,30 @@ func WSASocket(af int32, typ int32, protocol int32, protinfo *syscall.WSAProtoco
return
}
func LockFileEx(file syscall.Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) {
r1, _, e1 := syscall.Syscall6(procLockFileEx.Addr(), 6, uintptr(file), uintptr(flags), uintptr(reserved), uintptr(bytesLow), uintptr(bytesHigh), uintptr(unsafe.Pointer(overlapped)))
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func UnlockFileEx(file syscall.Handle, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) {
r1, _, e1 := syscall.Syscall6(procUnlockFileEx.Addr(), 5, uintptr(file), uintptr(reserved), uintptr(bytesLow), uintptr(bytesHigh), uintptr(unsafe.Pointer(overlapped)), 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func GetACP() (acp uint32) {
r0, _, _ := syscall.Syscall(procGetACP.Addr(), 0, 0, 0, 0)
acp = uint32(r0)