66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
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// All rights reserved. Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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package scanner
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import (
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"os"
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"path/filepath"
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"sync"
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"github.com/syncthing/syncthing/protocol"
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)
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// The parallell hasher reads FileInfo structures from the inbox, hashes the
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// file to populate the Blocks element and sends it to the outbox. A number of
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// workers are used in parallel. The outbox will become closed when the inbox
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// is closed and all items handled.
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func newParallelHasher(dir string, blockSize, workers int, outbox, inbox chan protocol.FileInfo) {
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var wg sync.WaitGroup
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wg.Add(workers)
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for i := 0; i < workers; i++ {
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go func() {
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hashFile(dir, blockSize, outbox, inbox)
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wg.Done()
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}()
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}
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go func() {
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wg.Wait()
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close(outbox)
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}()
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}
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func hashFile(dir string, blockSize int, outbox, inbox chan protocol.FileInfo) {
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for f := range inbox {
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if protocol.IsDirectory(f.Flags) || protocol.IsDeleted(f.Flags) {
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outbox <- f
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continue
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}
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fd, err := os.Open(filepath.Join(dir, f.Name))
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if err != nil {
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if debug {
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l.Debugln("open:", err)
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}
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continue
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}
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blocks, err := Blocks(fd, blockSize)
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fd.Close()
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if err != nil {
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if debug {
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l.Debugln("hash error:", f.Name, err)
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}
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continue
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}
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f.Blocks = blocks
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outbox <- f
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}
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}
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