mirror of https://github.com/perkeep/perkeep.git
63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package localdisk
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import (
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"os"
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"camlistore.org/pkg/blob"
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"camlistore.org/pkg/syncutil"
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"camlistore.org/pkg/types"
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)
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const maxParallelStats = 20
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var statGate = syncutil.NewGate(maxParallelStats)
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func (ds *DiskStorage) StatBlobs(dest chan<- blob.SizedRef, blobs []blob.Ref) error {
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if len(blobs) == 0 {
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return nil
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}
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statSend := func(ref blob.Ref) error {
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fi, err := os.Stat(ds.blobPath(ref))
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switch {
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case err == nil && fi.Mode().IsRegular():
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dest <- blob.SizedRef{Ref: ref, Size: types.U32(fi.Size())}
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return nil
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case err != nil && !os.IsNotExist(err):
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return err
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}
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return nil
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}
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if len(blobs) == 1 {
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return statSend(blobs[0])
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}
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var wg syncutil.Group
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for _, ref := range blobs {
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ref := ref
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statGate.Start()
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wg.Go(func() error {
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defer statGate.Done()
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return statSend(ref)
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})
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}
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return wg.Err()
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}
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