59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
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//go:build plus
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package caches
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import (
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"github.com/TeaOSLab/EdgeNode/internal/utils/mmap"
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"os"
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)
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func (this *FileStorage) tryMMAPReader(isPartial bool, estimatedSize int64, path string) (Reader, error) {
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// TODO 因为在实践中MMAP耗费了太多CPU，在未解决之前先暂停支持
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return nil, nil
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var options = this.options // copy
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if estimatedSize > 0 &&
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!isPartial &&
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(options != nil && options.EnableMMAP) &&
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IsValidForMMAPSize(estimatedSize) {
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var isOk bool
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defer func() {
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if !isOk {
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_ = this.removeCacheFile(path)
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}
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}()
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sharedMMAP, err := mmap.OpenSharedMMAP(path)
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if err != nil {
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if os.IsNotExist(err) {
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isOk = true
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return nil, ErrNotFound
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}
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return nil, err
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}
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reader, err := NewMMAPFileReader(sharedMMAP)
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if err != nil {
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if os.IsNotExist(err) {
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isOk = true
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return nil, ErrNotFound
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}
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return nil, err
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}
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err = reader.Init()
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if err != nil {
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if os.IsNotExist(err) {
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isOk = true
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return nil, ErrNotFound
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}
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return nil, err
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}
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isOk = true
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return reader, nil
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}
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return nil, nil
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}
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