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// Copyright (C) 2014 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package ignore
import (
"time"
"github.com/syncthing/syncthing/lib/ignore/ignoreresult"
)
type nower interface {
Now() time.Time
}
var clock = nower(defaultClock{})
type cache struct {
patterns []Pattern
entries map[string]cacheEntry
}
type cacheEntry struct {
result ignoreresult.R
access int64 // Unix nanosecond count. Sufficient until the year 2262.
}
func newCache(patterns []Pattern) *cache {
return &cache{
patterns: patterns,
entries: make(map[string]cacheEntry),
}
}
func (c *cache) clean(d time.Duration) {
for k, v := range c.entries {
if clock.Now().Sub(time.Unix(0, v.access)) > d {
delete(c.entries, k)
}
}
}
func (c *cache) get(key string) (ignoreresult.R, bool) {
entry, ok := c.entries[key]
if ok {
entry.access = clock.Now().UnixNano()
c.entries[key] = entry
}
return entry.result, ok
}
func (c *cache) set(key string, result ignoreresult.R) {
c.entries[key] = cacheEntry{result, time.Now().UnixNano()}
}
func (c *cache) len() int {
l := len(c.entries)
return l
}
type defaultClock struct{}
func (defaultClock) Now() time.Time {
return time.Now()
}
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