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fix race in DBReadCache

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This commit is contained in:
nikk gitanes
2024-04-10 00:04:48 +03:00
parent 78db941fd7
commit 9f93de6305
1 changed files with 15 additions and 4 deletions
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19
server/settings/dbreadcache.go
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@@ -1,11 +1,15 @@
package settings package settings
import "server/log" import (
"server/log"
"sync"
)
type DBReadCache struct { type DBReadCache struct {
db TorrServerDB db TorrServerDB
listCache map[string][]string listCache map[string][]string
dataCache map[[2]string][]byte dataCache map[[2]string][]byte
dataCacheMutex sync.RWMutex
} }
func NewDBReadCache(db TorrServerDB) TorrServerDB { func NewDBReadCache(db TorrServerDB) TorrServerDB {
@@ -26,11 +30,16 @@ func (v *DBReadCache) CloseDB() {
func (v *DBReadCache) Get(xPath, name string) []byte { func (v *DBReadCache) Get(xPath, name string) []byte {
cacheKey := v.makeDataCacheKey(xPath, name) cacheKey := v.makeDataCacheKey(xPath, name)
v.dataCacheMutex.RLock()
defer v.dataCacheMutex.RUnlock()
if data, ok := v.dataCache[cacheKey]; ok { if data, ok := v.dataCache[cacheKey]; ok {
return data return data
} }
v.dataCacheMutex.RUnlock()
data := v.db.Get(xPath, name) data := v.db.Get(xPath, name)
v.dataCacheMutex.Lock()
v.dataCache[cacheKey] = data v.dataCache[cacheKey] = data
v.dataCacheMutex.Unlock()
return data return data
} }
@@ -40,7 +49,9 @@ func (v *DBReadCache) Set(xPath, name string, value []byte) {
return return
} }
cacheKey := v.makeDataCacheKey(xPath, name) cacheKey := v.makeDataCacheKey(xPath, name)
v.dataCacheMutex.Lock()
v.dataCache[cacheKey] = value v.dataCache[cacheKey] = value
v.dataCacheMutex.Unlock()
delete(v.listCache, xPath) delete(v.listCache, xPath)
v.db.Set(xPath, name, value) v.db.Set(xPath, name, value)
} }