33 lines
675 B
Go
33 lines
675 B
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information
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package sync2
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import (
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"context"
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"io"
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monkit "gopkg.in/spacemonkeygo/monkit.v2"
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)
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var mon = monkit.Package()
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type readerFunc func(p []byte) (n int, err error)
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func (rf readerFunc) Read(p []byte) (n int, err error) { return rf(p) }
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// Copy implements copying with cancellation
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func Copy(ctx context.Context, dst io.Writer, src io.Reader) (written int64, err error) {
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defer mon.Task()(&ctx)(&err)
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written, err = io.Copy(dst, readerFunc(func(p []byte) (int, error) {
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select {
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case <-ctx.Done():
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return 0, ctx.Err()
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default:
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return src.Read(p)
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}
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}))
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return written, err
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}
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