func (r *OutputDebugStringReceiver) createMemoryMappedFile() {
if nil != r.err {
return
}
var str *uint16
str, r.err = windows.UTF16PtrFromString("DBWIN_BUFFER")
if nil != r.err {
return
}
r.buffer, r.err = windows.CreateFileMapping(
windows.InvalidHandle,
nil,
0x4,
0,
4096,
str)
if nil != r.err {
return
}
r.view, r.err = windows.MapViewOfFile(r.buffer, 0x4, 0, 0, 0)
}
func mmap(fd int, length int) (data []byte, err error) {
h, errno := windows.CreateFileMapping(windows.Handle(fd), nil,
uint32(windows.PAGE_READONLY), 0, uint32(length), nil)
if h == 0 {
return nil, os.NewSyscallError("CreateFileMapping", errno)
}
addr, errno := windows.MapViewOfFile(h, uint32(windows.FILE_MAP_READ), 0,
0, uintptr(length))
if addr == 0 {
return nil, os.NewSyscallError("MapViewOfFile", errno)
}
handleLock.Lock()
handleMap[addr] = h
handleLock.Unlock()
m := memoryMap{}
dh := m.header()
dh.Data = addr
dh.Len = length
dh.Cap = dh.Len
return m, nil
}