mirror of
https://github.com/octoleo/syncthing.git
synced 2024-12-24 20:00:26 +00:00
85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. If not, see <http://www.gnu.org/licenses/>.
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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/internal/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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fi, err := fd.Stat()
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if err != nil {
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fd.Close()
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if debug {
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l.Debugln("stat:", err)
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}
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continue
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}
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blocks, err := Blocks(fd, blockSize, fi.Size())
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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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