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47 lines
823 B
47 lines
823 B
// +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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