github.com/xraypb/xray-core@v1.6.6/common/buf/readv_windows.go (about)

     1  package buf
     2  
     3  import (
     4  	"syscall"
     5  )
     6  
     7  type windowsReader struct {
     8  	bufs []syscall.WSABuf
     9  }
    10  
    11  func (r *windowsReader) Init(bs []*Buffer) {
    12  	if r.bufs == nil {
    13  		r.bufs = make([]syscall.WSABuf, 0, len(bs))
    14  	}
    15  	for _, b := range bs {
    16  		r.bufs = append(r.bufs, syscall.WSABuf{Len: uint32(Size), Buf: &b.v[0]})
    17  	}
    18  }
    19  
    20  func (r *windowsReader) Clear() {
    21  	for idx := range r.bufs {
    22  		r.bufs[idx].Buf = nil
    23  	}
    24  	r.bufs = r.bufs[:0]
    25  }
    26  
    27  func (r *windowsReader) Read(fd uintptr) int32 {
    28  	var nBytes uint32
    29  	var flags uint32
    30  	err := syscall.WSARecv(syscall.Handle(fd), &r.bufs[0], uint32(len(r.bufs)), &nBytes, &flags, nil, nil)
    31  	if err != nil {
    32  		return -1
    33  	}
    34  	return int32(nBytes)
    35  }
    36  
    37  func newMultiReader() multiReader {
    38  	return new(windowsReader)
    39  }