46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package fusefrontend_reverse
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import (
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"sync"
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)
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// rPathCacheContainer is a simple one entry path cache. Because the dirIV
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// is generated deterministically from the directory path, there is no need
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// to ever invalidate entries.
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type rPathCacheContainer struct {
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sync.Mutex
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// Relative ciphertext path to the directory
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cPath string
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// Relative plaintext path
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pPath string
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// Directory IV of the directory
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dirIV []byte
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}
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// lookup relative ciphertext path "cPath". Returns dirIV, relative
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// plaintext path.
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func (c *rPathCacheContainer) lookup(cPath string) ([]byte, string) {
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c.Lock()
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defer c.Unlock()
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if cPath == c.cPath {
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// hit
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return c.dirIV, c.pPath
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}
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// miss
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return nil, ""
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}
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// store - write entry for the directory at relative ciphertext path "cPath"
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// into the cache.
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// "dirIV" = directory IV of the directory, "pPath" = relative plaintext path
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func (c *rPathCacheContainer) store(cPath string, dirIV []byte, pPath string) {
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c.Lock()
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defer c.Unlock()
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c.cPath = cPath
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c.dirIV = dirIV
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c.pPath = pPath
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}
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// rPathCache: see rPathCacheContainer above for a detailed description
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var rPathCache rPathCacheContainer
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