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v2fly/common/io/writer.go

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package io
import (
"io"
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"github.com/v2ray/v2ray-core/common"
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"github.com/v2ray/v2ray-core/common/alloc"
)
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// Writer extends io.Writer with alloc.Buffer.
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type Writer interface {
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common.Releasable
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// Write writes an alloc.Buffer into underlying writer.
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Write(*alloc.Buffer) error
}
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// AdaptiveWriter is a Writer that writes alloc.Buffer into underlying writer.
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type AdaptiveWriter struct {
writer io.Writer
}
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// NewAdaptiveWriter creates a new AdaptiveWriter.
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func NewAdaptiveWriter(writer io.Writer) *AdaptiveWriter {
return &AdaptiveWriter{
writer: writer,
}
}
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// Write implements Writer.Write(). Write() takes ownership of the given buffer.
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func (this *AdaptiveWriter) Write(buffer *alloc.Buffer) error {
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defer buffer.Release()
for !buffer.IsEmpty() {
nBytes, err := this.writer.Write(buffer.Value)
if err != nil {
return err
}
buffer.SliceFrom(nBytes)
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}
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return nil
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}
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func (this *AdaptiveWriter) Release() {
this.writer = nil
}