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48 lines
823 B
48 lines
823 B
4 years ago
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// +build !windows
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// +build !wasm
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// +build !illumos
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package buf
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import (
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"syscall"
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"unsafe"
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)
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type posixReader struct {
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iovecs []syscall.Iovec
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}
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func (r *posixReader) Init(bs []*Buffer) {
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iovecs := r.iovecs
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if iovecs == nil {
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iovecs = make([]syscall.Iovec, 0, len(bs))
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}
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for idx, b := range bs {
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iovecs = append(iovecs, syscall.Iovec{
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Base: &(b.v[0]),
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})
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iovecs[idx].SetLen(int(Size))
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}
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r.iovecs = iovecs
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}
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func (r *posixReader) Read(fd uintptr) int32 {
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n, _, e := syscall.Syscall(syscall.SYS_READV, fd, uintptr(unsafe.Pointer(&r.iovecs[0])), uintptr(len(r.iovecs)))
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if e != 0 {
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return -1
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}
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return int32(n)
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}
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func (r *posixReader) Clear() {
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for idx := range r.iovecs {
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r.iovecs[idx].Base = nil
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}
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r.iovecs = r.iovecs[:0]
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}
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func newMultiReader() multiReader {
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return &posixReader{}
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}
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