mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-11-04 22:23:03 +00:00
47 lines
844 B
Go
47 lines
844 B
Go
//go:build !windows && !wasm && !illumos
|
|
// +build !windows,!wasm,!illumos
|
|
|
|
package buf
|
|
|
|
import (
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
type posixReader struct {
|
|
iovecs []syscall.Iovec
|
|
}
|
|
|
|
func (r *posixReader) Init(bs []*Buffer) {
|
|
iovecs := r.iovecs
|
|
if iovecs == nil {
|
|
iovecs = make([]syscall.Iovec, 0, len(bs))
|
|
}
|
|
for idx, b := range bs {
|
|
iovecs = append(iovecs, syscall.Iovec{
|
|
Base: &(b.v[0]),
|
|
})
|
|
iovecs[idx].SetLen(int(Size))
|
|
}
|
|
r.iovecs = iovecs
|
|
}
|
|
|
|
func (r *posixReader) Read(fd uintptr) int32 {
|
|
n, _, e := syscall.Syscall(syscall.SYS_READV, fd, uintptr(unsafe.Pointer(&r.iovecs[0])), uintptr(len(r.iovecs)))
|
|
if e != 0 {
|
|
return -1
|
|
}
|
|
return int32(n)
|
|
}
|
|
|
|
func (r *posixReader) Clear() {
|
|
for idx := range r.iovecs {
|
|
r.iovecs[idx].Base = nil
|
|
}
|
|
r.iovecs = r.iovecs[:0]
|
|
}
|
|
|
|
func newMultiReader() multiReader {
|
|
return &posixReader{}
|
|
}
|